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https://en.wikipedia.org/wiki/Robert%20B.%20Davis | Robert B. Davis (June 23, 1926December 21, 1997) was an American mathematician and mathematics educator.
Davis was born in Fall River, Massachusetts.
He graduated from MIT with a B.S, M.S, and Ph.D. (1951) in mathematics. He was a professor and researcher at the University of New Hampshire, Syracuse University, the University of Illinois and Rutgers University, where he was named New Jersey Professor of Mathematics Education in 1988. He was one of the founders of the Madison Project, a study of mathematics education which spanned 15 years. The project is named for Madison Junior High School in Syracuse, where it began. The project moved to Webster College near St, Louis, Missouri in 1961.
Davis was the founding editor of The Journal of Mathematical Behavior (originally The Journal of Children's Mathematical Behavior), with Herbert Ginsburg in 1971.
Davis was given the Ross Taylor/Glenn Gilbert National Leadership Award posthumously by the National Council of Supervisors of Mathematics in 1998.
Selected publications
References
1926 births
1997 deaths
20th-century American mathematicians
Massachusetts Institute of Technology School of Science alumni
Mathematicians from New York (state)
Mathematics educators
People from Fall River, Massachusetts
Rutgers University faculty
Syracuse University faculty
University of New Hampshire alumni |
https://en.wikipedia.org/wiki/Functional%20additive%20models | In statistics, functional additive models (FAM) can be viewed as extensions of generalized functional linear models where the linearity assumption between the response (scalar or functional) and the functional linear predictor is replaced by an additivity assumption.
Overview
Functional Additive Model
In these models, functional predictors () are paired with responses () that can be either scalar or functional. The response can follow a continuous or discrete distribution and this distribution may be in the exponential family. In the latter case, there would be a canonical link that connects predictors and responses. Functional predictors (or responses) can be viewed as random trajectories generated by a square-integrable stochastic process. Using functional principal component analysis and the Karhunen-Loève expansion, these processes can be equivalently expressed as a countable sequence of their functional principal component scores (FPCs) and eigenfunctions. In the FAM the responses (scalar or functional) conditional on the predictor functions are modeled as function of the functional principal component scores of the predictor function in an additive structure. This model can be categorized as a Frequency Additive Model since it is additive in the predictor FPC scores.
Continuously Additive Model
The Continuously Additive Model (CAM) assumes additivity in the time domain. The functional predictors are assumed to be smooth across the time domain since the times contained in an interval domain are an uncountable set, an unrestricted time-additive model is not feasible. This motivates to approximate sums of additive functions by integrals so that the traditional vector additive model be replaced by a smooth additive surface. CAM can handle generalized responses paired with multiple functional predictors.
Functional Generalized Additive Model
The Functional Generalized Additive Model (FGAM) is an extension of generalized additive model with a scalar response and a functional predictor. This model can also deal with multiple functional predictors.
The CAM and the FGAM are essentially equivalent apart from implementation details and therefore can be covered under one description. They can be categorized as Time-Additive Models.
Functional Additive Model
Model
Functional Additive Model for scalar and functional responses respectively, are given by
where and are FPC scores of the processes and respectively,
and are the eigenfunctions of processes and respectively, and and are arbitrary smooth functions.
To ensure identifiability one may require,
Implementation
The above model is considered under the assumption that the true FPC scores for predictor processes are known.
In general, estimation in the generalized additive model requires backfitting algorithm or smooth backfitting to account for the dependencies between predictors. Now FPCs are always uncorrelated and if the predictor processes are assumed to be gaussian then th |
https://en.wikipedia.org/wiki/Claude%20Dechales | Claude François Milliet Dechales (1621 – 28 March 1678) was a French Jesuit priest and mathematician. He published a treatise on mathematics and a translation of the works of Euclid, though of lesser quality than that of Gilles Personne de Roberval.
Biography
Born in Chambéry, Savoy, Claude Dechales (De Challes) was the son of Hector Milliet de Challes (1568–1642), first president of Sovereign Senate of Savoy.
He entered the Jesuits at the age of fifteen on 21 September 1636. He participated in the French Jesuit mission to the Ottoman Empire and taught literature in the schools of his order for nine years. Back in France, Louis XIV had him appointed professor of hydrography in Marseille where he taught navigation and military engineering. He then moved to the Trinity College in Lyon in 1674, where he simultaneously taught philosophy (4 years), mathematics (6 years) and theology (5 years). He published in Lyon his famous Cursus seu Mondus Matematicus.
At the end of his life, Dechales taught mathematics in a college in Turin in Piedmont, where he died, on 28 March 1678.
Publications
1660–1672 : Huict livres des Elemens d'Euclide rendus plus faciles par le R.P. Claude François Milliet Dechales, de la Compagnie de Jésus (B. Coral, Lyon).
1674 : a second edition of Euclide, Elementorum Euclidis libri octo, ad faciliorem captum accommodati (Lyon, Anisson).
1674 : Cursus seu Mondus Matematicus Ex officina anissonina (Anisson).
1677 : L'art de fortifier, de défendre et d'attaquer les places, suivant les méthodes françoises, hollandoises, italiennes et espagnoles (Paris), and L'art de naviger demontré par principes et confirmé par plusieurs observations tirées de l'experience (Paris).
1682 : Traité du mouvement local et du ressort dans lequel, leur nature, & leurs causes, sont curieusement recherchées, & ou les loix qu'ils observent dans l'acceleration & les pendules, & encore dans la percussion & la reflexion des corps, sont solidement establies, à Lyon chez Anisson et Posuel.
1685 : Euclide translated in English under the title The elements of Euclid explain'd, in a new, but most easie method : together with the use of every proposition through all parts of the mathematicks.
References
Sources
Nardi, Antonio, "An eccentric adherent of Galileo. The jesuit François Milliet Dechales between Galileo and Newton", Archives internationales d'histoire des sciences 49 (142), January 1999
Le scholasticon, by Jacob Schmutz.
Vincent Jullien : les Eléments de géométrie de Gilles Personne de Roberval,
French Jesuits
French mathematicians
1621 births
Jesuit scientists
1678 deaths |
https://en.wikipedia.org/wiki/Jeferson%20%28footballer%2C%20born%201987%29 | Jeferson Francisco dos Santos Barroso (born April 17, 1987 in São Paulo), known as Jeferson, is a Brazilian footballer who plays for São José as midfielder.
Career statistics
References
External links
1987 births
Living people
Brazilian men's footballers
Men's association football midfielders
São José Esporte Clube players
Grêmio Catanduvense de Futebol players
Clube Atlético Sorocaba players
América Futebol Clube (SP) players
São Bernardo Futebol Clube players
União Agrícola Barbarense Futebol Clube players
Associação Atlética Francana players
Footballers from São Paulo |
https://en.wikipedia.org/wiki/Moreil%C3%A2ndia%20%28footballer%29 | José Jefsson Cordeiro de Sá (born April 13, 1989 in Moreilândia), known as Moreilândia, is a Brazilian footballer who plays for Salgueiro as midfielder.
Career statistics
References
External links
1989 births
Living people
Brazilian men's footballers
Men's association football midfielders
Campeonato Brasileiro Série C players
Campeonato Brasileiro Série D players
Grêmio Catanduvense de Futebol players
Mogi Mirim Esporte Clube players
C.D. Trofense players
Salgueiro Atlético Clube players |
https://en.wikipedia.org/wiki/Rina%20Zazkis | Rina Zazkis is a Canadian scholar in education and mathematics. She is a Professor in the Faculty of Education at Simon Fraser University and a Canada Research Chair in STEM Teaching and Learning.
Career
Zazkis began her academic career at Simon Fraser University (SFU) in 1991 as an Assistant Professor. She was eventually promoted to Full Professor in the Faculty of Education by 2000. In 2011, she was a recipient of the Dean of Graduate Studies Awards for Excellence.
In 2017, she was appointed a Canada Research Chair in STEM Teaching and Learning. Two years later she received the 2019 Partners In Research National Award.
References
Year of birth missing (living people)
Living people
Academic staff of Simon Fraser University
Canadian educators
Canadian women educators |
https://en.wikipedia.org/wiki/Gercimar | Gercimar Maximiliano de Matos Junior (born August 28, 1990), known as Gercimar, is a Brazilian footballer who plays for São Caetano as midfielder.
Career statistics
References
External links
1990 births
Living people
Brazilian men's footballers
Men's association football midfielders
Campeonato Brasileiro Série B players
Campeonato Brasileiro Série D players
Associação Atlética Ponte Preta players
Guaratinguetá Futebol players
Clube de Regatas Brasil players
América Futebol Clube (RN) players
Rio Branco Esporte Clube players
Ituano FC players
Associação Desportiva São Caetano players |
https://en.wikipedia.org/wiki/Mateus%20Borelli | Mateus da Silva Santos Borelli (born October 19, 1993), known as Mateus Borelli, is a Brazilian footballer who plays for Almirante Barroso as midfielder.
Career statistics
References
External links
1993 births
Living people
Brazilian men's footballers
Men's association football midfielders
Campeonato Brasileiro Série B players
Guaratinguetá Futebol players
Rio Branco Esporte Clube players |
https://en.wikipedia.org/wiki/Tangent%E2%80%93secant%20theorem | In Euclidean geometry, the tangent-secant theorem describes the relation of line segments created by a secant and a tangent line with the associated circle.
This result is found as Proposition 36 in Book 3 of Euclid's Elements.
Given a secant intersecting the circle at points and and a tangent intersecting the circle at point and given that and intersect at point , the following equation holds:
The tangent-secant theorem can be proven using similar triangles (see graphic).
Like the intersecting chords theorem and the intersecting secants theorem, the tangent-secant theorem represents one of the three basic cases of a more general theorem about two intersecting lines and a circle, namely, the power of point theorem.
References
S. Gottwald: The VNR Concise Encyclopedia of Mathematics. Springer, 2012, , pp. 175-176
Michael L. O'Leary: Revolutions in Geometry. Wiley, 2010, , p. 161
Schülerduden - Mathematik I. Bibliographisches Institut & F.A. Brockhaus, 8. Auflage, Mannheim 2008, , pp. 415-417 (German)
External links
Tangent Secant Theorem at proofwiki.org
Power of a Point Theorem auf cut-the-knot.org
Theorems about circles |
https://en.wikipedia.org/wiki/Hans%20Munthe-Kaas | Hans Zanna Munthe-Kaas (born 28 March 1961) is a Norwegian mathematician at the University of Bergen, and UiT The Arctic University of Norway working in the area of computational mathematics in the borderland between pure and applied mathematics and computer science.
He took his PhD at the Norwegian Institute of Technology in 1989, called to full Professor 1997 and has since 2005 been Professor of Mathematics. Since 2021 he is also working at UiT The Arctic University of Norway in Tromsø where he heads the newly established Lie-Størmer Center for fundamental structures in computational and pure mathematics.
Research
The work of Munthe-Kaas is centred on applications of differential geometry and Lie group techniques in geometric integration and structure preserving algorithms for numerical integration of differential equations. A central aspect is the analysis of structure preservation by algebraic and combinatorial techniques (B-series and Lie–Butcher series).
In the mid-1990s Munthe-Kaas developed what are now known as Runge–Kutta–Munthe-Kaas methods, a generalisation of Runge–Kutta methods to integration of differential equations evolving on Lie groups. The analysis of numerical Lie group integrators leads to the study of new types of formal power series for flows on manifolds (Lie–Butcher series). Lie–Butcher theory combines classical B-series with Lie-series.
Algebraically, B-series are based on pre-Lie algebras, whereas the generalised Lie–Butcher series are based on the concept of post-Lie algebras. Applications in numerical integration on manifolds has led to fundamental research in the structure of post-Lie algebras and their relations to differential geometry, with ramifications in many different areas of applications.
Honors and awards
Munthe-Kaas received Exxon Mobil Award for best PhD at NTNU, 1989, and the Carl-Erik Frōberg Prize in Numerical Mathematics 1996 for the paper "Lie–Butcher theory for Runge–Kutta Methods". Munthe-Kaas is elected member of Academia Europaea, the Norwegian Academy of Science and Letters, the Royal Norwegian Society of Sciences and Letters and the Norwegian Academy of Technological Sciences. Munthe-Kaas is the chair of the international Abel prize committee (2018-2022), he is President of the Scientific Council of Centre International de Mathématiques Pures et Appliquées (CIMPA) (2017–present) and he is Editor-in-Chief of Journal Foundations of Computational Mathematics (2017–present). Munthe-Kaas was secretary of Foundations of Computational Mathematics (2005–2011) and member of the Board of the Abel Prize in Mathematics (2010–2018).
Personal life
Munthe-Kaas married Antonella Zanna, an Italian numerical analyst, in 1997; they have four children and a dog.
References
1961 births
Living people
Norwegian mathematicians
Norwegian Institute of Technology alumni
Academic staff of the University of Bergen
Members of the Norwegian Academy of Science and Letters
Royal Norwegian Society of Sciences an |
https://en.wikipedia.org/wiki/Glenea%20algebraica | Glenea algebraica is a species of beetle in the family Cerambycidae. It was described by James Thomson in 1857. It is known from Borneo, Malaysia, Java and Sumatra.
Varietas
Glenea algebraica var. analytica Pascoe, 1867
Glenea algebraica var. griseofrontalis Breuning, 1956
Glenea algebraica var. griseosuturalis Pic, 1943
Glenea algebraica var. mediovittata Pic, 1943
Glenea algebraica var. tenuefasciata Breuning, 1956
References
algebraica
Beetles described in 1857 |
https://en.wikipedia.org/wiki/Nick%20Kyrgios%20career%20statistics | This is a list of the main career statistics of Australian professional tennis player Nick Kyrgios whose professional career started in 2013. To date, Kyrgios has won seven ATP singles titles and his highest attained singles ranking is No. 13 which he reached on 24 October 2016.
Performance timelines
Singles
Current through the 2023 Stuttgart Open.
Note: Kyrgios received a walkover in the second-round match of the 2015 French Open against Kyle Edmund and in the 2022 Wimbledon semifinals against Rafael Nadal, which do not count as a win.
Doubles
Significant finals
Grand Slam finals
Singles: 1 (1 runner-up)
Doubles: 1 (1 title)
ATP Masters 1000
Singles: 1 (1 runner-up)
ATP career finals
Singles: 11 (7 titles, 4 runner-ups)
Doubles: 4 (4 titles)
ATP Challengers and ITF Futures finals
Singles: 6 (5 titles, 1 runner-up)
Doubles: 2 (1 title, 1 runner-up)
Record against top-10 players
Kyrgios' ATP-only record against players who have been ranked in the top-10, with those who are active in boldface.
Top 10 wins per season
Kyrgios has a record against players who were, at the time the match was played, ranked in the top 10.
*
National representation
Davis Cup (11–6)
ATP Cup (4–1)
Team competition finals: 1 (1 title)
Team Tennis Leagues
League finals: 2 (2 championships)
''*(HC): Head Coach, (F): Franchise Player, (W): Wildcard Player, (R): Roster Player, (S): Substitute Player
See also
Australia Davis Cup team
List of Australia Davis Cup team representatives
List of Grand Slam men's doubles champions
Fastest recorded tennis serves
References
External links
Kyrgios, Nick
Sport in Australia
Tennis in Australia |
https://en.wikipedia.org/wiki/Unemployment%20in%20Turkey | Unemployment in Turkey measured by the Office for National Statistics show unemployment in Turkey at 3 647 000 (12.7%) as of December 2017. Though unemployment is a general problem for the whole world, the degree of unemployment in Turkey is especially high in respect to the other countries in the region at the same economic level. In the year 2017, the data on "youth unemployment", which indicates unemployment between 15 and 25 according to the data of the Turkish Statistical Institute (TUİK), showed a worse performance than the general unemployment rate and increased by 4.8 percentage points to 24 percent.
On 10 September 2020, a data released by the Turkish Statistical Institute (TurkStat) reported that the unemployment rate in Turkey rose to 13.4%. In July 2019, the statistics went up by 0.4% and the number of unemployed person of age 15 and over, slipped by 152,000 year-on-year. Meanwhile, the same figures flipped in 2020, as the number of unemployed people rose to 4.1 million by the end of June 2020. According to the Turkish Statistical Institute, the employment rate reached 42.4%, which was observed to be descending significantly by 4% on an annual basis.
References
External links
Turkish Statistical Institute, Labor Force Statistics, June 2016
Turkey
Labor in Turkey |
https://en.wikipedia.org/wiki/Fausto%20%28footballer%2C%20born%201980%29 | Fausto Luis Momente Silva (born December 12, 1980 in Mirandópolis), known as Fausto, is a retired Brazilian footballer who played as forward.
Career statistics
References
External links
1980 births
Living people
Brazilian men's footballers
Men's association football forwards
Clube Atlético Linense players
Atlético Monte Azul players
Botafogo Futebol Clube (SP) players
Botafogo Futebol Clube (PB) players
América Futebol Clube (SP) players
Sertãozinho Futebol Clube players
União Agrícola Barbarense Futebol Clube players
Viktoria Aschaffenburg players
P.A.E. G.S. Diagoras players
Anápolis Futebol Clube players
Goiás Esporte Clube players
Esporte Clube Juventude players
Marília Atlético Clube players
People from Mirandópolis
Footballers from São Paulo (state) |
https://en.wikipedia.org/wiki/Allan%20Gomiero | Allan Maxwel Borges Gomiero (born February 15, 1988 in Campinas), known as Allan Borges, Allan Gomiero or simply Allan, is a Brazilian footballer who played as midfielder.
Career statistics
References
External links
1988 births
Living people
Brazilian men's footballers
Men's association football forwards
Associação Atlética Internacional (Limeira) players
Ituano FC players
Treze Futebol Clube players
Capivariano Futebol Clube players
Clube Atlético Votuporanguense players
Footballers from Campinas |
https://en.wikipedia.org/wiki/Kathleen%20Utgoff | Kathleen Utgoff, an American economist, was Commissioner of the Bureau of Labor Statistics from 2002–2006.
Education
Utgoff holds a BA degree in Economics from California State University, Northridge, and a PhD in Economics from UCLA (1978).
Career
Utgoff began her career at the Center for Naval Analyses and served as a senior economist at the Council of Economic Advisers during the Reagan administration. President Reagan appointed her as executive director of the Pension Benefit Guarantee Corporation in 1985.
During her time as Commissioner of the Bureau of Labor Statistics, BLS increased the number of data series published and expanded internet-based data collection. Utgoff is also credited with establishing an "unofficial motto" for BLS: "When asked whether the glass is half full or half empty, the bureau’s response is, It’s an eight-ounce glass with four ounces of liquid."
Selected works
Utgoff, Kathleen Classen. "Compensation levels and quit rates in the public sector." Journal of Human Resources (1983): 394-406.
Utgoff, Kathleen P., and Zvi Bodie. "The PBGC: A costly lesson in the economics of federal insurance." In Government Risk-Bearing, pp. 145–166. Springer, Dordrecht, 1993.
Utgoff, Kathleen P. "Pension Reform Strengthens Defined-Benefit Plans." Compensation and Benefits Management 4 (1988): 273-5.
References
American women economists
Economists from California
20th-century American economists
21st-century American economists
Bureau of Labor Statistics
United States Department of Labor officials
George W. Bush administration personnel
American civil servants
American women civil servants
California State University, Northridge alumni
University of California, Los Angeles alumni
Labor economists
Living people
Year of birth missing (living people)
21st-century American women |
https://en.wikipedia.org/wiki/William%20Schooling | Sir William Schooling (16 December 1860 – 18 February 1936) was a British expert on insurance and statistics. He was named a CBE in the 1918 Birthday Honours and a KBE in 1920 for his work with the War Savings Committee.
Schooling was the editor of Bourne's Directory, a listing of British insurance companies, and the author of several books on insurance and on the history of the Hudson's Bay Company.
With Mark Barr, he also did pioneering work on the mathematics of the golden ratio.
References
1860 births
1936 deaths
British statisticians
Golden ratio |
https://en.wikipedia.org/wiki/Symmetrohedron | In geometry, a symmetrohedron is a high-symmetry polyhedron containing convex regular polygons on symmetry axes with gaps on the convex hull filled by irregular polygons.
The name was coined by Craig S. Kaplan and George W. Hart.
The trivial cases are the Platonic solids, Archimedean solids with all regular polygons. A first class is called bowtie which contain pairs of trapezoidal faces. A second class has kite faces. Another class are called LCM symmetrohedra.
Symbolic notation
Each symmetrohedron is described by a symbolic expression G(l; m; n; α). G represents the symmetry group (T,O,I). The values l, m and n are the multipliers ; a multiplier of m will cause a regular km-gon to be placed at every k-fold axis of G. In the notation, the axis degrees are assumed to be sorted in descending order, 5,3,2 for I, 4,3,2 for O, and 3,3,2 for T . We also allow two special values for the multipliers: *, indicating that no polygons should be placed on the given axes, and 0, indicating that the final solid must have a vertex (a zero-sided polygon) on the axes. We require that one or two of l, m, and n be positive integers. The final parameter, α, controls the relative sizes of the non-degenerate axis-gons.
Conway polyhedron notation is another way to describe these polyhedra, starting with a regular form, and applying prefix operators. The notation doesn't imply which faces should be made regular beyond the uniform solutions of the Archimedean solids.
1-generator point
These symmetrohedra are produced by a single generator point within a fundamental domains, reflective symmetry across domain boundaries. Edges exist perpendicular to each triangle boundary, and regular faces exist centered on each of the 3 triangle corners.
The symmetrohedra can be extended to euclidean tilings, using the symmetry of the regular square tiling, and dual pairs of triangular and hexagonal tilings. Tilings, Q is square symmetry p4m, H is hexagonal symmetry p6m.
Coxeter-Dynkin diagrams exist for these uniform polyhedron solutions, representing the position of the generator point within the fundamental domain. Each node represents one of 3 mirrors on the edge of the triangle. A mirror node is ringed if the generator point is active, off the mirror, and creates new edges between the point and its mirror image.
2-generator points
3-generator points
See also
Near-miss Johnson solid
Conway polyhedron notation
References
External links
Symmetrohedra on RobertLovesPi.net.
Antiprism Free software that includes Symmetro for generating and viewing these polyhedra with Kaplan-Hart notation.
Polyhedra |
https://en.wikipedia.org/wiki/Marcelo%20Godri | Marcelo Godri (born February 20, 1987 in Blumenau) is a Brazilian footballer who plays for Votuporanguense as defender.
Career statistics
References
External links
1987 births
Living people
Sportspeople from Blumenau
Brazilian men's footballers
Men's association football defenders
Campeonato Brasileiro Série B players
Campeonato Brasileiro Série C players
Campeonato Brasileiro Série D players
Clube Atlético Bragantino players
Esporte Clube Santo André players
São Bernardo Futebol Clube players
Atlético Monte Azul players
Grêmio Barueri Futebol players
Grêmio Osasco Audax Esporte Clube players
Treze Futebol Clube players
Esporte Clube Taubaté players
Clube Atlético Votuporanguense players
Footballers from Santa Catarina (state) |
https://en.wikipedia.org/wiki/Raul%20%28footballer%2C%20born%201986%29 | Raul Ferreira dos Anjos (born 31 October 1986), known as Raul, is a Brazilian footballer who plays as forward for Portuguesa.
Career statistics
References
External links
1986 births
Living people
Brazilian men's footballers
Men's association football forwards
Campeonato Brasileiro Série B players
Campeonato Brasileiro Série C players
Campeonato Brasileiro Série D players
São Bernardo Futebol Clube players
Esporte Clube Santo André players
Esporte Clube Juventude players
Associação Ferroviária de Esportes players
Red Bull Bragantino II players
Campinense Clube players
América Futebol Clube (RN) players
Associação Portuguesa de Desportos players
Clube Atlético Linense players
Footballers from São Bernardo do Campo |
https://en.wikipedia.org/wiki/Patrick%20Drewes | Patrick Drewes (born 4 February 1993) is a German professional footballer who plays as a goalkeeper for club Karlsruher SC.
Career statistics
References
External links
1993 births
Living people
People from Delmenhorst
German men's footballers
Footballers from Lower Saxony
Men's association football goalkeepers
2. Bundesliga players
3. Liga players
Regionalliga players
Swiss Challenge League players
VfL Wolfsburg II players
VfL Wolfsburg players
FC Wil players
SC Preußen Münster players
Würzburger Kickers players
VfL Bochum players
SV Sandhausen players
Karlsruher SC players
German expatriate men's footballers
German expatriate sportspeople in Switzerland
Expatriate men's footballers in Switzerland |
https://en.wikipedia.org/wiki/M.%20Zahid%20Hasan | M. Zahid Hasan is the Eugene Higgins Professor of Physics at Princeton University. His primary research area is quantum physics and quantum topology.
Biography
Born in Dhaka, Bangladesh, Hasan completed his higher secondary schooling at Dhanmondi Government Boys' High School and Dhaka College, then studied physics and mathematics at the University of Texas at Austin. He obtained his Ph.D. in 2002 from Stanford University, working at SLAC/Stanford National Accelerator Laboratory and Brookhaven National Laboratory.
After a term as a Robert H. Dicke Fellow in fundamental physics at Princeton and visiting appointments at Bell Labs (in Murray Hill, New Jersey), SLAC/Stanford National Accelerator Laboratory and Lawrence Berkeley National Laboratory, Hasan joined the faculty rank at Princeton University.
Hasan is the Principal Investigator of Laboratory for Topological Quantum Matter and Advanced Spectroscopy at Princeton University and a Visiting Faculty Scientist at Lawrence Berkeley National Laboratory in California Since 2014 he has been an EPiQS-Moore Investigator, awarded by the Betty and Gordon Moore foundation in Palo Alto (California) for his research on emergent quantum phenomena in topological matter. He has been a Vanguard Fellow of the Aspen Institute (Washington DC) since 2014. Hasan is an elected fellow of the American Academy of Arts and Sciences.
Research
Hasan's research is focused on fundamental physics - either searching for, or in-depth exploration of novel phases of electronic quantum matter. He co-proposed and co-led the scattering-spectroscopy MERLIN beam-line and end-station facility at the Lawrence Berkeley National Laboratory. and developed a laboratory for ultrafast and coherent quantum phenomena at Princeton University.
References
Living people
Princeton University faculty
Stanford University alumni
Year of birth missing (living people) |
https://en.wikipedia.org/wiki/Jefferson%20Maranh%C3%A3o%20%28footballer%2C%20born%201989%29 | Jefferson Viana Correa (born June 10, 1989 in São Luís), known as Jefferson Maranhão, is a Brazilian footballer who plays for Sertãozinho as midfielder.
Career statistics
References
External links
1989 births
Living people
Brazilian men's footballers
Men's association football midfielders
Campeonato Brasileiro Série B players
Campeonato Brasileiro Série C players
Campeonato Brasileiro Série D players
Moto Club de São Luís players
Ituano FC players
Avaí FC players
Paraná Clube players
Mogi Mirim Esporte Clube players
Brasiliense FC players
Clube Atlético Sorocaba players
Clube de Regatas Brasil players
Mirassol Futebol Clube players
Clube Atlético Linense players
Madureira Esporte Clube players
Sertãozinho Futebol Clube players |
https://en.wikipedia.org/wiki/NUTS%20statistical%20regions%20of%20Serbia | As a candidate country of the European Union, Serbia (RS) is in the process of being included in the Nomenclature of Territorial Units for Statistics (NUTS). However, due to the ongoing dispute with Kosovo, it has not yet agreed with the European Commission and Eurostat. The proposed three NUTS levels are:
Local administrative units
Below the NUTS levels, the two LAU (Local Administrative Units) levels are:
See also
Administrative divisions of Serbia
ISO 3166-2 codes of Serbia
References
External links
Overview map of EU Countries - NUTS level 1
Serbia
Nuts |
https://en.wikipedia.org/wiki/Australian%20cricket%20team%20in%202016%E2%80%9317 | This article contains information, results and statistics regarding the Australian national cricket team in the 2016 and 2016–17 cricket seasons. Statisticians class the 2016–17 season as matches played between May 2016 and April 2017.
Player contracts
The 2016 - 17 list, or roster, was announced on 1 April 2016. Note that uncontracted players are still available to be selected to play for the national cricket team.
Match summary
2016 season
ODI Tri-Series in West Indies
2nd ODI
3rd ODI
4th ODI
5th ODI
7th ODI
8th ODI
Final
Tour of Sri Lanka
1st Test
2nd Test
3rd Test
1st ODI
2nd ODI
3rd ODI
4th ODI
5th ODI
1st T20I
2nd T20I
2016–17 season
ODI Series in South Africa
1st ODI
2nd ODI
3rd ODI
4th ODI
5th ODI
South Africa Test Series in Australia
1st Test
2nd Test
3rd Test
Pakistan tour in Australia
1st Test
2nd Test
3rd Test
1st ODI
2nd ODI
3rd ODI
4th ODI
5th ODI
ODI Series in New Zealand
1st ODI
2nd ODI
3rd ODI
Sri Lanka T20I Series in Australia
1st T20I
2nd T20I
3rd T20I
Test Series in India
1st Test
2nd Test
3rd Test
Draw
4th Test
See also
Australia national cricket team
References
2016-17 |
https://en.wikipedia.org/wiki/Smoothing%20problem%20%28stochastic%20processes%29 | The smoothing problem (not to be confused with smoothing in statistics, image processing and other contexts) is the problem of estimating an unknown probability density function recursively over time using incremental incoming measurements. It is one of the main problems defined by Norbert Wiener. A smoother is an algorithm that implements a solution to this problem, typically based on recursive Bayesian estimation. The smoothing problem is closely related to the filtering problem, both of which are studied in Bayesian smoothing theory.
A smoother is often a two-pass process, composed of forward and backward passes. Consider doing estimation (prediction/retrodiction) about an ongoing process (e.g. tracking a missile) based on incoming observations. When new observations arrive, estimations about past needs to be updated to have a smoother (more accurate) estimation of the whole estimated path until now (taking into account the newer observations). Without a backward pass (for retrodiction), the sequence of predictions in an online filtering algorithm does not look smooth. In other words, retrospectively, it is as if we are using future observations for improving estimation of a point in past, when those observations about future points become available. Note that time of estimation (which determines which observations are available) can be different to the time of the point that the prediction is about (that is subject to prediction/retrodiction). The observations about later times can be used to update and improved the estimations about earlier times. Doing so leads to smoother-looking estimations (retrodiction) about the whole path.
Examples of smoothers
Some variants include:
Rauch–Tung–Striebel (RTS) smoother
Gaussian smoothers (e.g., extended Kalman smoother or sigma-point smoothers) for non-linear state-space models.
Particle smoothers
The confusion in terms and the relation between Filtering and Smoothing problems
The terms Smoothing and Filtering are used for four concepts that may initially be confusing: Smoothing (in two senses: estimation and convolution), and Filtering (again in two senses: estimation and convolution).
Smoothing (estimation) and smoothing (convolution) despite being labelled with the same name in English language, can mean totally different mathematical procedures. The requirements of problems they solve are different. These concepts are distinguished by the context (signal processing versus estimation of stochastic processes).
The historical reason for this confusion is that initially, the Wiener's suggested a "smoothing" filter that was just a convolution. Later on his proposed solutions for obtaining a smoother estimation separate developments as two distinct concepts. One was about attaining a smoother estimation by taking into account past observations, and the other one was smoothing using filter design (design of a convolution filter).
Both the smoothing problem (in sense of estimation) and the fil |
https://en.wikipedia.org/wiki/Outage%20probability | In Information theory, outage probability of a communication channel is the probability that a given information rate is not supported, because of variable channel capacity. Outage probability is defined as the probability that information rate is less than the required threshold information rate. It is the probability that an outage will occur within a specified time period.
Slow-fading channel
For example, the channel capacity for slow-fading channel is C = log2(1 + h2 SNR), where h is the fading coefficient and SNR is a signal to noise ratio without fading. As C is random, no constant rate is available. There may be a chance that information rate may go below to required threshold level. For slow fading channel, outage probability = P(C < r) = P(log2(1 + h2 SNR) < r), where r is the required threshold information rate.
See also
Shannon–Hartley theorem
Fading channel
References
Information theory |
https://en.wikipedia.org/wiki/Samuelson%E2%80%93Berkowitz%20algorithm | In mathematics, the Samuelson–Berkowitz algorithm efficiently computes the characteristic polynomial of an matrix whose entries may be elements of any unital commutative ring. Unlike the Faddeev–LeVerrier algorithm, it performs no divisions, so may be applied to a wider range of algebraic structures.
Description of the algorithm
The Samuelson–Berkowitz algorithm applied to a matrix produces a vector whose entries are the coefficient of the characteristic polynomial of . It computes this coefficients vector recursively as the product of a Toeplitz matrix and the coefficients vector an principal submatrix.
Let be an matrix partitioned so that
The first principal submatrix of is the matrix . Associate with the Toeplitz matrix
defined by
if is ,
if is ,
and in general
That is, all super diagonals of consist of zeros, the main diagonal consists of ones, the first subdiagonal consists of and the th subdiagonal
consists of .
The algorithm is then applied recursively to , producing the Toeplitz matrix times the characteristic polynomial of , etc. Finally, the characteristic polynomial of the matrix is simply . The Samuelson–Berkowitz algorithm then states that the vector defined by
contains the coefficients of the characteristic polynomial of .
Because each of the may be computed independently, the algorithm is highly parallelizable.
References
Linear algebra
Polynomials
Numerical linear algebra |
https://en.wikipedia.org/wiki/Flow%20sampling | In statistics, in flow sampling, as opposed to stock sampling, observations are collected as they enter the particular state of interest during a particular interval. When dealing with duration data (such as employment spells or mortality outcomes), the data sampling method has a direct impact on subsequent analyses and inference. An example in demography would be sampling the number of people who die within a given time frame (e.g. a specific calendar year); a popular example in economics would be the number of people leaving unemployment within a given time frame (e.g. a specific quarter). Researchers imposing similar assumptions but using different sampling methods, can reach fundamentally different conclusions if the joint distribution across the flow and stock samples differ.
Typically, flow samples suffer from right censoring. After a certain amount of time, as the sampling interval ends, the individuals in the sample are not followed any longer, outcomes are recorded and the data is analyzed. In the unemployment example outlined above, we observe the exact duration for individuals leaving unemployment within the time frame. For people that haven't left unemployment yet, we only observe the lower bound of the unemployment spell. The difference between stock and flow sampling can also help explain why certain statistics that measure similar duration measures can differ in important ways. Consider, for instance, the Average Interrupted Duration (AID), the average period for which people that are currently unemployed have been unemployed, and ACD, the average duration of the complete unemployment spell for employed people. Salant shows that heterogeneity in hazard rates between the stock and the flow distribution provides a key to understanding why these two statistics differ. For instance, if the probability of getting a job offer goes down with time unemployed, E[T] < E[S], where S and T stand for observed and actual duration respectively.
Renewal theory is the appropriate tool for handling these issues, and a wide range of estimators have been proposed. These estimators range from fully parametric models such as the Mixed Proportional Hazard model, to nonparametric and semiparametric methods.
References
Sampling (statistics) |
https://en.wikipedia.org/wiki/Risky%20sexual%20behavior | Risky sexual behavior is the description of the activity that will increase the probability that a person engaging in sexual activity with another person infected with a sexually transmitted infection will be infected or become pregnant, or make a partner pregnant. It can mean two similar things: the behavior itself, and the description of the partner's behavior. The behavior could be unprotected vaginal, oral, or anal intercourse. The partner could be a nonexclusive partner, HIV-positive, or an intravenous drug user. Drug use is associated with risky sexual behaviors.
Factors
Risky sexual behavior can be:
Barebacking, i.e. sex without a condom.
Mouth-to-genital contact.
Starting sexual activity at a young age.
Having multiple sex partners.
Having a high-risk partner, someone who has multiple sex partners or infections.
Anal sex without condom and proper lubrication.
Sex with a partner who has ever injected drugs.
Engaging in sex work.
Risky sexual behavior includes unprotected intercourse, multiple sex partners, and illicit drug use. The use of alcohol and illicit drugs greatly increases the risk of gonorrhea, chlamydia, trichomoniasis, hepatitis B, and HIV/AIDS. Trauma from penile-anal sex has been identified as a risky sexual behavior.
Risky sexual behaviors can lead to serious consequences both for person and their partner(s). This sometimes includes cervical cancer, ectopic pregnancy and infertility. An association exists between those with a higher incidence of body art (body piercings and tattoos) and risky sexual behavior.
Epidemiology
According to the National Youth Behavior Risk Survey, 19% of all sexually active adolescents in the US consumed alcohol or used other drugs before their last sexual intercourse. In contrast, adolescents who reported no substance use were found to be the least likely to engage in sexual risk-taking.
Most Canadian and American adolescents aged 15 to 19 years describe having had sexual intercourse at least one time. In the same population, 23.9% and 45.5% of young, adolescent females describe having sex with two or more sexual partners during the previous year. Of the males in the same population, 32.1% of Canadian males had two or more partners and 50.8% of American males also describe a similar experience.
Alcohol is the most commonly used substance among youth aged 18–25 years. 10% of young adults had an alcohol use disorder in 2018, which is greater than the prevalence among all other age cohorts. Research indicates that alcohol can lead to risky sexual behavior including lack of condom use, sexual intercourse with a non-primary partner, as well as lower likelihood of using contraception in general.
Among older age cohorts, a similar positive trend can be observed in risky sexual behavior when combined with alcohol use. For instance, research on older men who have sex with men (MSM) showed that the likelihood of engaging in risky sexual activities increased with the use of alcohol and other |
https://en.wikipedia.org/wiki/Erd%C5%91s%E2%80%93Moser%20equation | In number theory, the Erdős–Moser equation is
where and are positive integers. The only known solution is 11 + 21 = 31, and Paul Erdős conjectured that no further solutions exist.
Constraints on solutions
Leo Moser in 1953 proved that, in any further solutions, 2 must divide k and that m ≥ 101,000,000.
In 1966, it was shown that 6 ≤ k + 2 < m < 2k.
In 1994, it was shown that lcm(1,2,...,200) divides k and that any prime factor of m + 1 must be irregular and > 10000.
Moser's method was extended in 1999 to show that m > 1.485 × 109,321,155.
In 2002, it was shown that all primes between 200 and 1000 must divide k.
In 2009, it was shown that 2k / (2m – 3) must be a convergent of ln(2); large-scale computation of ln(2) was then used to show that m > 2.7139 × 101,667,658,416.
References
Diophantine equations
Moser equation
Unsolved problems in number theory |
https://en.wikipedia.org/wiki/Olabisi%20Ugbebor | Olabisi Oreofe Ugbebor (née Grace Olabisi Falode, born 29 January 1951) is the first female professor in mathematics in Nigeria. Born in Lagos, she studied mathematics at the University of Ibadan and then at the University of London, where she obtained a PhD in 1976.
Education and academic career
Born in Lagos, Ugbebor had her secondary education at Queen's College, Lagos. She completed her first degree in mathematics from University of Ibadan in 1972. In 1973, she had a postgraduate diploma in statistics at University College London, before completing her thesis on Sample Path Properties of Brownian Motion (1976) at the age of 25. While at Unibadan, she was the only female student in her class. She is also the first Nigerian woman to get a PhD and become a professor in mathematics. In 2017, she was made a Fellow of the Mathematics Association of Nigeria.
Publications
He's Polynomials for Analytical Solutions of the Black-Scholes Pricing Model for Stock Option Valuation
The modified Black-Scholes model via constant elasticity of variance for stock options valuation
Analytical Solutions of a Continuous Arithmetic Asian Model for Option Pricing using Projected Differential Transform Method
Fast Fourier Transform of Multi-Assets Options under Economic Recession Induced Uncertainties
Approximate solutions of a variable volatility driven black-scholes option pricing model
CONSTRUCTION OF ANALYTICAL SOLUTIONS TO THE BLACK-SCHOLES OPTION VALUATION MODEL BY MEANS OF HE’S POLYNOMIALS TECHNIQUE\
Analytical solutions of a time-fractional nonlinear transaction-cost model for stock option valuation in an illiquid market setting driven by a relaxed Black-Scholes assumption
Membership of learned societies
Reciprocity Member, London Mathematical Society
Member, Nigerian Mathematical Society
Member, Mathematics Association of Nigeria.
Member, African Economic Society.
Member, Bernoulli Society for Mathematical Statistics and Probability(1988-1992)
Member, Third World Organisation of Women in Science, Italy, 1993-date.
References
External links
Home page
https://www.researchgate.net/scientific-contributions/OO-Ugbebor-2087991282
1951 births
Scientists from Lagos
Nigerian women academics
20th-century Nigerian mathematicians
Women mathematicians
University of Ibadan alumni
Academic staff of the University of Ibadan
Alumni of the University of London
Living people
21st-century Nigerian mathematicians |
https://en.wikipedia.org/wiki/Ebadollah%20S.%20Mahmoodian | Ebadollah S. Mahmoodian (born 18 May 1943 in Zanjan, Iran) is a retired professor of mathematics at the Mathematical Sciences Department of Sharif University of Technology.
He received his Bachelor of Science in 1965 at University of Tehran and his master's degree in 1968 at Shiraz University. He got a Master's and a PhD degree from the University of Pennsylvania in 1971 and 1975, respectively. His thesis advisor were Albert Nijenhuis and Herbert Wilf. He was a professor of mathematics at the Mathematical Sciences Department of Sharif University of Technology since 1983. He co-edited Combinatorics Advances.
Mahmoodian has contributions in graph theory, in particular graph colouring. He has also worked on combinatorial designs, in particular, defining sets, and the relations between all those areas. Mahmoodian is also known for mentoring and research collaborations with Maryam Mirzakhani during her studies at Sharif University.
References
Further reading
External links
Publications on Google scholar
20th-century Iranian mathematicians
Graph theorists
Academic staff of Sharif University of Technology
People from Zanjan, Iran
1943 births
Living people
Iranian Science and Culture Hall of Fame recipients in Mathematics and Physics |
https://en.wikipedia.org/wiki/Alexei%20Klishin | Alexei Nikolayevich Klishin (born 1 October 1973) is a retired Kazakh football midfielder.
Career statistics
International
Statistics accurate as of 22 March 2017
International goals
Notes
External links
1973 births
Living people
Kazakhstani men's footballers
Men's association football midfielders
Kazakhstan men's international footballers
Kazakhstan Premier League players
Skonto FC players
FC Kairat players
FC Shakhter Karagandy players
Kazakhstani expatriate men's footballers
Expatriate men's footballers in Estonia
Kazakhstani expatriate sportspeople in Estonia
Expatriate men's footballers in Latvia
Kazakhstani expatriate sportspeople in Latvia
FC Megasport players
Sportspeople from Karaganda
Soviet men's footballers |
https://en.wikipedia.org/wiki/Jiang%20Lifu | Jiang Lifu (4 July 1890 – 3 February 1978) was a Chinese mathematician and educator widely regarded as the Father of modern Chinese mathematics. His main research areas are the theory of syringine geometry and matrix.
Life
Born in 1890 during the late Qing Dynasty, Jiang Lifu was a native of Pingyang County in Wenzhou.
He received a Bachelor of Science degree from the University of California in May 1915 and entered Harvard University in 1916, where he obtained his second degree there in 1919.
In 1920, he founded the Department of Studies at Nankai University and was the only teacher teaching in that department. It was also stated by many of his former students that his teaching was very strict. In 1934, Jiang went to the University of Hamburg and the University of Göttingen. During World War II, he went to teach at the war-time formed National Southwestern Associated University, and was selected to be the new mathematics society chairman.
Family
Jiang Lifu had a son, Jiang Boju, who is a professor of mathematics at Peking University.
References
1890 births
1978 deaths
Mathematicians from Zhejiang
Harvard University alumni
University of California alumni
Academic staff of the National Southwestern Associated University
Academic staff of Nankai University
Scientists from Wenzhou
Academic staff of Sun Yat-sen University
Educators from Wenzhou |
https://en.wikipedia.org/wiki/University%20Professor%20of%20Natural%20Philosophy%20%28Dublin%29 | The University Chair of Natural Philosophy is a professorship in the School of Mathematics at Trinity College Dublin. It was established in 1847.
From 1724 to 1847 the Erasmus Smith's Professorship of Natural and Experimental Philosophy had a mathematical and theoretical orientation, with many holders being also mathematicians. Several, such as Bartholomew Lloyd (1822) and James MacCullagh (1843), previously held the Erasmus Smith's Professor of Mathematics position. In 1847 the University Chair of Natural Philosophy was founded and took on the applied mathematics and theoretical physics role, while Erasmus Smith's Professor of Natural and Experimental Philosophy (1724) effectively became the chair of experimental physics.
List of the professors
1847–1870: John Jellett (1817–1888)
1870–1884: Richard Townsend (1821–1884)
1884–1890: Benjamin Williamson (1827–1916)
1890–1902: Francis Tarleton (1841–1920)
1902–1910: Frederick Purser (1839–1910)
1910–1925: Matthew Fry (1863–1943)
1925–1930: J. L. Synge (1897–1995)
1930–1957: Albert McConnell (1903–1993)
1957–1962: vacant
1962–1966: John Chisholm (born 1926)
1966–1997: David Spearman (born 1937)
1997–2002: vacant
2002–present: Samson Shatashvili
See also
List of professorships at the University of Dublin
Natural philosophy
References
1847 establishments in Ireland
Natural Philosophy, University
Natural Philosophy, University, Dublin
Natural Philosophy, University, Dublin |
https://en.wikipedia.org/wiki/Boron%20nitride%20nanosheet | Boron nitride nanosheet is a two-dimensional crystalline form of the hexagonal boron nitride (h-BN), which has a thickness of one to few atomic layers. It is similar in geometry as well as physical and thermal properties to its all-carbon analog graphene, but has very different chemical and electronic properties – contrary to the black and highly conducting graphene, BN nanosheets are electrical insulators with a band gap of ~5.9 eV, and therefore appear white in color.
Uniform monoatomic BN nanosheets can be deposited by catalytic decomposition of borazine at a temperature ~1100 °C in a chemical vapor deposition setup, over substrate areas up to about 10 cm2. Owing to their hexagonal atomic structure, small lattice mismatch with graphene (~2%), and high uniformity they are used as substrates for graphene-based devices.
Structure
BN nanosheets consist of sp2-conjugated boron and nitrogen atoms that form a honeycomb structure. They contain two different edges: armchair and zig-zag. The armchair edge consists of either boron or nitrogen atoms, while the zig-zag edge consists of alternating boron and nitrogen atoms. These 2D structures can stack on top of each other and are held by Van der Waals forces to form few-layer boron nitride nanosheets. In these structures, the boron atoms of one sheet are positioned on top or below the nitrogen atoms due to electron-deficient nature of boron and electron-rich nature of nitrogen.
Synthesis
CVD
Chemical vapor deposition is the most common method to produce BN nanosheets because it is a well-established and highly controllable process that yields high-quality material over areas exceeding 10 cm2. There is a wide range of boron and nitride precursors for CVD synthesis, such as borazine, and their selection depends on toxicity, stability, reactivity, and the nature of the CVD method.
Mechanical cleavage
Mechanical cleaving methods of boron nitride use shear forces to break the weak van der Waals interactions between the BN layers. Cleaved nanosheets have low defect densities and retain the lateral size of the original substrate. Inspired by its use in the isolation of graphene, micromechanical cleavage, also known as the Scotch-tape method, has been used to consistently isolate few-layer and monolayer boron nitride nanosheets by subsequent exfoliation of the starting material with adhesive tape. The disadvantage of this technique is that it is not scalable for large-scale production.
Boron nitride sheets can be also exfoliated by ball milling, where shear forces are applied on the face of bulk boron nitride by rolling balls. This technique yields large quantities of low-quality material with poor control over its properties.
Unzipping of boron nitride nanotubes
BN nanosheets can be synthesized by the unzipping boron nitride nanotubes via potassium intercalation or etching by plasma or an inert gas. Here the intercalation method has a relatively low yield as boron nitride is resistive to the effects |
https://en.wikipedia.org/wiki/Eric%20Bradlow | Eric Thomas Bradlow is K.P. Chao Professor, Professor of Marketing, Statistics, Education and Economics, Chairperson Wharton Marketing Department, and Vice-Dean of Analytics at the Wharton School of the University of Pennsylvania. He is known for his work on marketing research methods, missing data problems, and psychometrics. He is a fellow of the American Statistical Association and a fellow the American Education Research Association. Professor Bradlow is also co-founder of GBH Insights, a leading data-focused marketing strategy and insights firm that caters to Fortune 500 companies.
Awards
American Marketing Association, EXPLOR Award (2007)
2006 Research Committee of the Society of General Internal Medicine Best Paper Award
Inaugural Fellow of the University of Pennsylvania, (2009)
Finalist, John D.C. Little Award (2008) for best paper in Marketing Science or Management Science
Finalist, Paul E. Green Award for the best paper in Journal of Marketing Research, 2004.
Finalist 1997 American Statistical Association Savage Award Dissertation Prize
Books
Wainer, H., Bradlow, E.T., and Wang, X. (2007), “Testlet Response Theory and Its Applications”, Cambridge University Press, .
Bradlow, E.T., Niedermeier, K., Williams, P. (2009), “Marketing in the Financial Services Industry”, McGraw-Hill, New York.
Selected publications
Chandon, P., Hutchinson, J. W., Bradlow, E. T., & Young, S. H. (2009). Does in-store marketing work? Effects of the number and position of shelf facings on brand attention and evaluation at the point of purchase. Journal of Marketing, 73(6), 1-17.
Hui, Sam K., Eric T. Bradlow, and Peter S. Fader. "Testing behavioral hypotheses using an integrated model of grocery store shopping path and purchase behavior." Journal of consumer research 36, no. 3 (2009): 478-493.
Werner, Rachel M., and Eric T. Bradlow. "Relationship between Medicare’s hospital compare performance measures and mortality rates." Jama 296, no. 22 (2006): 2694-2702.
Park, Young-Hoon, and Eric T. Bradlow. "An integrated model for bidding behavior in Internet auctions: Whether, who, when, and how much." Journal of Marketing Research 42, no. 4 (2005): 470-482.
Bradlow, Eric T., and Peter S. Fader. "A Bayesian lifetime model for the “Hot 100” Billboard songs." Journal of the American Statistical Association 96, no. 454 (2001): 368-381.
Wainer, Howard, Eric T. Bradlow, and Zuru Du. "Testlet response theory: An analog for the 3PL model useful in testlet-based adaptive testing." In Computerized adaptive testing: Theory and practice, pp. 245–269. Springer Netherlands, 2000.
Bradlow, Eric T., Howard Wainer, and Xiaohui Wang. "A Bayesian random effects model for testlets." Psychometrika 64, no. 2 (1999): 153-168.
Hoch, Stephen J., Eric T. Bradlow, and Brian Wansink. "The variety of an assortment." Marketing Science 18, no. 4 (1999): 527-546.
References
Living people
American statisticians
Harvard University alumni
Wharton School of the University of Pennsylvania faculty
Fel |
https://en.wikipedia.org/wiki/Loring%20W.%20Tu | Loring W. Tu (杜武亮, Wade–Giles: Tu Wu-liang) is a Taiwanese-American mathematician working in algebraic topology and geometry.
Life
He was born in Taipei, Taiwan. He is the grandson of Taiwanese pharmacologist Tu Tsung-ming. He is a younger brother of Charles Tu, who is a professor of electrical and computer engineering (ECE) at the University of California, San Diego.
He currently works at Tufts University.
Career
He attended McGill University and Princeton University as an undergraduate. He completed his Ph.D. at Harvard University. His doctoral advisor was Phillip A. Griffiths. His dissertation thesis was titled Hodge Theory and the Local Torelli Problem.
He is currently a professor of mathematics at Tufts University.
He has frequently collaborated with Raoul Bott.
Bibliography
Some of his books and papers are:
Introductory Lectures on Equivariant Cohomology (2020)
Differential Geometry: Connections, Curvature, and Characteristic Classes (2017)
An Introduction to Manifolds (2007)
Hodge Theory And The Local Torelli Problem (1983)
Differential Forms In Algebraic Topology (1982, with Raoul Bott)
References
External links
21st-century American mathematicians
1952 births
Living people
McGill University alumni
Princeton University alumni
Harvard Graduate School of Arts and Sciences alumni
Tufts University faculty
20th-century American mathematicians |
https://en.wikipedia.org/wiki/Bebeto%20%28footballer%2C%20born%201990%29 | Roberto de Jesus Machado (born 1 January 1990), known as Bebeto, is a Brazilian footballer who plays as a right-back for Portuguese club Tondela.
Career statistics
References
External links
1990 births
Living people
Brazilian men's footballers
Brazilian expatriate men's footballers
Men's association football defenders
Men's association football fullbacks
Campeonato Brasileiro Série B players
Campeonato Brasileiro Série C players
Campeonato Brasileiro Série D players
Primeira Liga players
Liga Portugal 2 players
Esporte Clube Bahia players
Associação Desportiva Bahia de Feira players
Paulista Futebol Clube players
Esporte Clube Rio Verde players
Sociedade Esportiva e Recreativa Caxias do Sul players
Esporte Clube São Bento players
C.S. Marítimo players
C.D. Tondela players
Expatriate men's footballers in Portugal
Footballers from Sergipe
People from Lagarto, Sergipe |
https://en.wikipedia.org/wiki/Bida%20%28footballer%29 | Valmir Roseno Santos (born 2 August 1984), known as Bida, is a Brazilian footballer who plays as midfielder for Mixto.
Career statistics
References
External links
1984 births
Living people
Brazilian men's footballers
Men's association football midfielders
Campeonato Brasileiro Série A players
Campeonato Brasileiro Série B players
Esporte Clube Vitória players
Santos FC players
Atlético Clube Goianiense players
Associação Atlética Ponte Preta players
Vila Nova Futebol Clube players
ABC Futebol Clube players
Mixto Esporte Clube players |
https://en.wikipedia.org/wiki/7825 | 7825 (seven thousand, eight hundred [and] twenty-five) is the natural number following 7824 and preceding 7826.
In mathematics
7825 is the smallest number n when it is impossible to assign two colors to natural numbers 1 through n such that every Pythagorean triple is multicolored, i.e. where the Boolean Pythagorean triples problem becomes false. The 200-terabyte proof to verify this is the largest ever made.
7825 is a magic constant of n × n normal magic square and n-Queens Problem for n = 25.
References
Integers |
https://en.wikipedia.org/wiki/The%20Mystery%20of%20the%20Sardine | The Mystery of the Sardine is a novel by Polish-English writer Stefan Themerson.
Initially the novel was called Euclid was an Ass, named thus for a tract written on Euclidean geometry by one of the characters. The manuscript came to the attention of the Dutch publisher De Harmonie, which had taken over Themerson's own Gaberbocchus Press, through which he had published his and his wife Franciszka's work, on a small scale. In 1985 a Dutch translation by Carol Limonard was published by De Bezige Bij. Through a Dutch-speaking person with connections to the English publisher Faber and Faber, it became published in English in 1986; Faber and Faber subsequently released more of Themerson's writing, including his last, Hobson's Island (1988). The novel was republished by Dalkey Archive Press.
A reviewer from Kirkus Reviews was less than impressed: "....a book whose best touch unfortunately is the title.... [It has] some political asides and some heavy-handed social comedy, and churn it very slowly into a stringy mass, and you have this book's sour-tasting fudge. Self-conscious to a fault but not even close to compelling". Justin Warshaw with the Times Literary Supplement noted that "the Mystery of the Sardine is never solved nor is it ever quite clear what it actually entails". In an appreciation of the Themersons published in 2015, Michael Caines noted that the TLS earlier praised the novel for its "many rum non sequiturs". American novelist Jonathan Lethem listed it as his summer reading in August 2015.
In 2005, a movie by Dutch filmmaker Erik van Zuylen based on Themerson's novel was released. Variety praised the film's technical qualities, but noted that it was unlikely to gain much traction outside of the Netherlands: "A large black dog with a sardine can around his neck is the unlikely suicide bomber apparently directed against philosophy lecturer Tim (Victor Low), who loses both legs in the blast. Trying to make sense of it, Tim obsessively goes over the period leading up to the attack, but nothing adds up. The mystery deepens when his wife, Vera (Renee Fokker), discovers a freshly painted representation of the attack in a local church. Embellishing the plot are absurdist side characters, notably a disheveled man often seen walking backwards. Tech credits are unassailable".
References
1985 novels
Farrar, Straus and Giroux books
Faber and Faber books |
https://en.wikipedia.org/wiki/Alauddin%20Khalji%27s%20raid%20on%20Bhilsa | {
"type": "FeatureCollection",
"features": [
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"type": "Feature",
"properties": { "marker-symbol": "monument", "title": "Kara" },
"geometry": { "type": "Point", "coordinates": [81.3640022, 25.6958063] }
},
{
"type": "Feature",
"properties": { "marker-symbol": "monument", "title": "Bhilsa" },
"geometry": { "type": "Point", "coordinates": [77.8081363, 23.5251102] }
}
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}
As a general of Jalal-ud-din Khalji, his nephew Alauddin Khalji (then known as Ali Gurshasp) raided the Paramara city of Bhilsa in 1293 CE. He damaged the city's Hindu temples, and looted a large amount of wealth.
Background
Alauddin Khalji was the governor of Kara in Sultan Jalaluddin's Delhi Sultanate. Although he feigned allegiance to the Sultan, he was determined to dethrone Jalaluddin, and sought to raise money for a successful coup. Towards this objective, he decided to target Bhilsa, a wealthy city in the Paramara kingdom of Malwa. By the 1290s, the Paramaras had been weakened by Chahamana, Vaghela, and Yadava invasions. In late 1292 CE, Alauddin Khalji obtained the Sultan's permission to raid Bhilsa.
The raid
In 1293 CE, Alauddin marched towards Bhilsa via the Chanderi-Ujjain road. His sudden attack took the city's residents by surprise.
The town had several richly-endowed Hindu temples, from which Alauddin obtained a large amount of wealth, including precious metals and cattle. The residents of Bhilsa concealed their idols in the riverbed of Betwa to prevent Alauddin's army from desecrating them. But Alauddin had these idols hauled out of Betwa. He damaged a number of temples, and plundered a large amount of wealth. According to Badauni's Muntakhab-ut-Tawarikh, Alauddin also brought to Delhi a large Hindu idol, which was placed at the Badaun Gate to be trampled by the people.
Aftermath
At Bhilsa, Alauddin learned of the immense wealth of the southern Seuna (Yadava) kingdom, and about the routes leading to their capital Devagiri. Therefore, he shrewdly surrendered the loot from Bhilsa to Jalaluddin to gain the Sultan's confidence, while withholding the information on the Yadava kingdom.
A pleased Jalaluddin rewarded Alauddin with the office of Ariz-i Mamalik (Ministry of War), which his father once held. Jalaluddin also made him the governor of Awadh, and granted his request to use the revenue surplus for hiring additional troops. Subsequently, in 1296, Alauddin raided Devagiri, and used that loot to raise an army and usurp the power from Jalaluddin.
References
Bibliography
Bhilsa
Paramara dynasty
Military raids
Battles involving the Rajputs
Battles involving the Delhi Sultanate
History of Madhya Pradesh |
https://en.wikipedia.org/wiki/FGLM%20algorithm | FGLM is one of the main algorithms in computer algebra, named after its designers, Faugère, Gianni, Lazard and Mora. They introduced their algorithm in 1993. The input of the algorithm is a Gröbner basis of a zero-dimensional ideal in the ring of polynomials over a field with respect to a monomial order and a second monomial order. As its output, it returns a Gröbner basis of the ideal with respect to the second ordering. The algorithm is a fundamental tool in computer algebra and has been implemented in most of the computer algebra systems. The complexity of FGLM is O(nD3), where n is the number of variables of the polynomials and D is the degree of the ideal. There are several generalization and various applications for FGLM.
References
Computer algebra
Commutative algebra
Polynomials |
https://en.wikipedia.org/wiki/Teo%20Mora | Ferdinando 'Teo' Mora is an Italian mathematician, and since 1990 until 2019 a professor of algebra at the University of Genoa.
Life and work
Mora's degree is in mathematics from the University of Genoa in 1974. Mora's publications span forty years; his notable contributions in computer algebra are the
tangent cone algorithm and its extension of Buchberger theory of Gröbner bases and related algorithm earlier to non-commutative polynomial rings and more recently to effective rings; less significant the notion of Gröbner fan; marginal, with respect to the other authors, his contribution to the FGLM algorithm.
Mora is on the managing-editorial-board of the journal AAECC published by Springer, and was also formerly an editor of the Bulletin of the Iranian Mathematical Society.
He is the author of the tetralogy Solving Polynomial Equation Systems:
Solving Polynomial Equation Systems I: The Kronecker-Duval Philosophy, on equations in one variable
Solving Polynomial Equation Systems II: Macaulay's paradigm and Gröbner technology, on equations in several variables
Solving Polynomial Equation Systems III: Algebraic Solving,
Solving Polynomial Equation Systems IV: Buchberger Theory and Beyond, on the Buchberger algorithm
Personal life
Mora lives in Genoa. Mora published a book trilogy in 1977-1978 (reprinted 2001-2003) called on the history of horror films. Italian television said in 2014 that the books are an "authoritative guide with in-depth detailed descriptions and analysis."
See also
FGLM algorithm, Buchberger's algorithm
Gröbner fan, Gröbner basis
Algebraic geometry#Computational algebraic geometry, System of polynomial equations
References
Notes
Further reading
. and volumes: , . Reprinted 2001.
also in:
External links
Official page
Teo Mora and Michela Ceria, Do It Yourself: Buchberger and Janet bases over effective rings, Part 1: Buchberger Algorithm via Spear’s Theorem, Zacharias’ Representation, Weisspfenning Multiplication, Part 2: Moeller Lifting Theorem vs Buchberger Criteria, Part 3: What happens to involutive bases?. Invited talk at ICMS 2020 International Congress on Mathematical Software , Braunschweig, 13-16 July 2020
Year of birth missing (living people)
Living people
Italian mathematicians
Computer algebra
Academic staff of the University of Genoa
University of Genoa alumni |
https://en.wikipedia.org/wiki/Nesin%20Mathematics%20Village | Nesin Mathematics Village () is an educational and research institute devoted to mathematics, which is located from Şirince village in Selçuk district of Izmir Province in western Turkey.
It was launched in 2007 by Ali Nesin, a veteran mathematics professor, who heads up education non-profit Nesin Foundation established by his father, humorist writer Aziz Nesin (1915–1995). Mathematics Village is funded by donations made to the Nesin Foundation.
Nesin Mathematics Village hosts various mathematical activities, mostly short summer courses. Teaching in the mathematics village "is voluntary; while the mathematics village does not provide honoria for the teachers, it provides free accommodations and meals". Courses range from high-school to graduate university courses. All high school courses are taught in Turkish, as the students do not necessarily know foreign languages, but any undergraduate or postgraduate course may be taught in English.
Students usually stay in the village for a cycle of two weeks. Each Thursday, a vacation activity is organized. There are no TVs or broadcast music, although there are occasionally film screenings.
Around fifteen paid staff and nearly one hundred volunteers work there every year. The village has also been hosting domestic and international mathematics meetings recently.
Ali Nesin was bestowed the 2018 Leelavati Award for "his outstanding contributions towards increasing public awareness of mathematics in Turkey, in particular for his tireless work in creating the 'Mathematical Village' as an exceptional, peaceful place for education, research, and the exploration of mathematics for anyone."
Demolition scare
According to a statement in July 2017 by Tekin Karadağ, the president of the Şirince Environment and Nature Association, Nesin Mathematics Village was slated for demolition by the authorities as being an "illegal construction". However, Harun Abuş, Director of Development and City Planning of Selçuk Municipality, declared that at this moment Nesin Mathematics Village is "not on the demolition calendar".
See also
Sevan Nişanyan
References
External links
Nesin Mathematics Village website
Article on the maths village
A trip diary to the maths village
Sevan Nisanyan on the maths village
Ali Nesin's Homepage
Nesin Matematik Köyü Hava Durumu
Mathematical institutes
Schools in Turkey
2007 establishments in Turkey
Selçuk District |
https://en.wikipedia.org/wiki/Ralph%20Gordon%20Stanton | Ralph Gordon Stanton (21 October 1923 – 21 April 2010) was a Canadian mathematician, teacher, scholar, and pioneer in mathematics and computing education. As a researcher, he made important contributions in the area of discrete mathematics; and as an educator and administrator, was also instrumental in founding the Faculty of Mathematics at the University of Waterloo, and for establishing its unofficial mascot of the pink tie.
Life and education
Stanton was born in Lambeth, Ontario, Canada on 21 October 1923. He was the eldest of four children.
Stanton received his BA in Mathematics and Physics in 1944 from the University of Western Ontario. He went on to receive his MA in 1945 and PhD in 1948, both from the University of Toronto. His PhD dissertation was on the topic "On The Mathiew Group M(Sub 24)", under advisor Richard Dagobert Brauer. He received honorary Doctor of Science degrees from the University of Queensland in 1989, and from the University of Natal in 1997. He also received an honorary D. Math from the University of Waterloo in 1997.
Career
Faculty positions
From 1946 to 1957 Stanton taught at the University of Toronto. In 1957, he moved to Kitchener-Waterloo to work at what was then Waterloo College, which was undergoing expansion, and became what is currently the University of Waterloo. At the time of his arrival he constituted the entirety of the Mathematics Department. Stanton became the university's first Dean of Graduate Studies in 1960. He turned the Department of Mathematics into the Faculty of Mathematics, which when it opened on January 1, 1967 was the first of its kind in North America. In 1967 he moved to York University to found their Graduate program in Mathematics. In 1970 he moved to the University of Manitoba's Department of Computer Science, serving successively as Head, Professor, and Distinguished Professor.
Research
Stanton's main areas of research were in statistics and applied statistics; algebra; mathematical biology; combinatorial design theory, including pair-wise balanced designs, difference sets, covering and packing designs, and room squares; graph theory, including graph models of networks; and algorithms.
Teaching and other influences
Stanton's influence on the young University of Waterloo extended to many areas. He hired Wes Graham, who Stanton had taught as an undergraduate. Graham became one of the first professors of computer science at the university, and the first Director of its Computing Centre in 1962. Stanton was one of five members of the Academic Advisory Committee that, in 1958, urged the board of governors to buy the Schweitzer farm on the outskirts of Waterloo that today houses the main campus. He introduced computers to classroom teaching in 1960, and introduced co-op programs in applied mathematics and computer science.
His interest in teaching extended to the secondary school level. He encouraged teaching of computing science and mathematics in high schools, serving as editor |
https://en.wikipedia.org/wiki/FIDYST | FIDYST is a proprietary simulation tool developed by the Fraunhofer Institute for Industrial Mathematics that simulates fibers in turbulent flows. The name FIDYST is an acronym and means Fiber Dynamics Simulation Tool.
History
In 1995 the Fraunhofer Institute for Industrial Mathematics started a research project in order to simulate the paper transport in a printing machine. The transport of papers in printing machines can be modelled as two-dimensional fluid-structure interaction problem. The equations describing the dynamics of the paper transport are derived from shell models based on continuum mechanics that are equivalent to rod models for fiber dynamics. In order to simulate nonwoven production processes the Fraunhofer Institute for Industrial Mathematics extended the Cosserat rod models by a stochastic drag model for fibers in turbulent flows. FIDYST demonstrated its proof of concept 2007. At the EDANA Symposium 2007 the industrial company Oerlikon Neumag presented a new pilot plant where FIDYST had successfully been applied to increase the tenacity of the produced nonwoven. In 2012 the software code was ported from C to C++. 2014 the interaction of fibers with machinery parts was introduced in FIDYST. The latest release of FIDYST can simulate staple fibers.
Application
FIDYST simulates the dynamics of elastic, line shaped objects in a very general way. Hence, there is a broad spectrum of different applications for FIDYST. Of particular importance are production processes of technical textiles
.
With FIDYST engineers simulate
spunbond processes,
meltblown processes, and
airlay processes.
The simulations of the fiber dynamics are used to optimize the geometry of the production plant and the operating conditions. Goal of the optimization is an improved quality of the final product and reduced energy and raw material consumption at the same time.
FIDYST runs under Linux and Windows.
References
Literature
C++ software
Continuum mechanics
Fluid dynamics
Scientific simulation software |
https://en.wikipedia.org/wiki/Diones | Diones Coelho da Costa (born 21 June 1985), known as Diones, is a Brazilian footballer who plays as midfielder for Associação Desportiva Bahia de Feira.
Career statistics
References
External links
1985 births
Living people
Brazilian men's footballers
Men's association football midfielders
Campeonato Brasileiro Série A players
Campeonato Brasileiro Série B players
Campeonato Brasileiro Série C players
Campeonato Brasileiro Série D players
Maranhão Atlético Clube players
Clube de Regatas Brasil players
Ferroviário Atlético Clube (CE) players
Associação Desportiva Bahia de Feira players
Sampaio Corrêa Futebol Clube players
Esporte Clube Bahia players
Associação Chapecoense de Futebol players
Joinville Esporte Clube players
Ceará Sporting Club players
Boa Esporte Clube players
Botafogo Futebol Clube (SP) players
Esporte Clube Juventude players
Parauapebas Futebol Clube players |
https://en.wikipedia.org/wiki/Principal%20response%20curve | In multivariate statistics, principal response curves (PRC) are used for analysis of treatment effects in experiments with a repeated measures design.
First developed as a special form of redundancy analysis, PRC allow temporal trends in control treatments to be corrected for, which allows the user to estimate the effects of the treatment levels without them being hidden by the overall changes in the system. An additional advantage of the method in comparison to other multivariate methods is that it gives a quantification of the treatment response of individual species that are present in the different groups.
References
Multivariate statistics |
https://en.wikipedia.org/wiki/Jackson%20Borges | Jackson Borges de Jesus (born 16 September 1987), known as Jackson Borges, Jackson Five or simply Jackson, is a Brazilian footballer who plays for Batatais as a forward
Career statistics
References
External links
1987 births
Living people
Brazilian men's footballers
Men's association football forwards
Campeonato Brasileiro Série B players
Rio Claro Futebol Clube players
Clube Atlético Metropolitano players
Ituano FC players
São Carlos Futebol Clube players
Associação Atlética Flamengo players
Associação Desportiva São Caetano players
Sociedade Esportiva Matonense players
Anápolis Futebol Clube players
Uberlândia Esporte Clube players
São José Esporte Clube players
Batatais Futebol Clube players
Sportspeople from Itabuna
Footballers from Bahia |
https://en.wikipedia.org/wiki/Gr%C3%B6bner%20fan | In computer algebra, the Gröbner fan of an ideal in the ring of polynomials is a concept in the theory of Gröbner bases. It is defined to be a fan consisting of cones that correspond to different monomial orders on that ideal. The concept was introduced by Mora and Robbiano in 1988.
The result is a weaker version of the result presented in the same issue of the journal by Bayer and Morrison. Gröbner fan is a base for the nowadays active field of tropical geometry.
One implementation of the Gröbner fan is called Gfan, based on an article of Fukuda, et al. which is included in some computer algebra systems such as Singular, Macaulay2, and CoCoA.
See also
Gröbner basis
Tropical geometry
References
Computer algebra
Algebraic geometry
Commutative algebra |
https://en.wikipedia.org/wiki/Feller%E2%80%93Tornier%20constant | In mathematics, the Feller–Tornier constant CFT is the density of the set of all positive integers that have an even number of distinct prime factors raised to a power larger than one (ignoring any prime factors which appear only to the first power).
It is named after William Feller (1906–1970) and Erhard Tornier (1894–1982)
Omega function
The Big Omega function is given by
See also: Prime omega function.
The Iverson bracket is
With these notations, we have
Prime zeta function
The prime zeta function P is give by
The Feller–Tornier constant satisfies
See also
Riemann zeta function
L-function
Euler product
Twin prime
References
Mathematical constants
Zeta and L-functions
Infinite products |
https://en.wikipedia.org/wiki/List%20of%20busiest%20railway%20stations%20in%20the%20Netherlands | Railway stations in the Netherlands ranked by how busy they are, with statistics from 2013 and 2014, are:
1–50
51–100
101–150
References
External links
Dutch Railways (NS) passengers per station in 2017 and 2018
Ridership of Dutch stations, 2013–2014 data
Busiest
Busiest railway stations in the Netherlands |
https://en.wikipedia.org/wiki/Porter%27s%20constant | In mathematics, Porter's constant C arises in the study of the efficiency of the Euclidean algorithm. It is named after J. W. Porter of University College, Cardiff.
Euclid's algorithm finds the greatest common divisor of two positive integers and . Hans Heilbronn proved that the average number of iterations of Euclid's algorithm, for fixed and averaged over all choices of relatively prime integers ,
is
Porter showed that the error term in this estimate is a constant, plus a polynomially-small correction, and Donald Knuth evaluated this constant to high accuracy. It is:
where
is the Euler–Mascheroni constant
is the Riemann zeta function
is the Glaisher–Kinkelin constant
See also
Lochs' theorem
Lévy's constant
References
Mathematical constants
Analytic number theory |
https://en.wikipedia.org/wiki/Lee%20You-hyeon | Lee You-hyeon (; born 8 February 1997) is a South Korean football defender who plays for Gimcheon Sangmu and the South Korea national under-23 football team.
Career statistics
Club
Honours
International
South Korea U23
AFC U-23 Championship: 2020
Notes
References
External links
1997 births
Living people
Men's association football defenders
South Korean men's footballers
Jeonbuk Hyundai Motors players
Jeonnam Dragons players
K League 1 players
South Korea men's under-20 international footballers
South Korea men's under-23 international footballers
Footballers at the 2020 Summer Olympics
Olympic footballers for South Korea |
https://en.wikipedia.org/wiki/Barrett%20O%27Neill | Barrett O'Neill (1924– 16 June 2011) was an American mathematician. He is known for contributions to differential geometry, including two widely-used textbooks on its foundational theory. He was the author of eighteen research articles, the last of which was published in 1973.
He received his Ph.D. in mathematics in 1951 from the Massachusetts Institute of Technology. His doctoral advisor was Witold Hurewicz. His dissertation thesis was titled Some Fixed Point Theorems He has worked as a professor of mathematics at UCLA, where he supervised the PhDs of eight doctoral students.
He made a foundational contribution to the theory of Riemannian submersions, showing how geometric quantities on the total space and on the base are related to one another. "O'Neill's formula" refers to the relation between the sectional curvatures. O'Neill's calculations simplified earlier work by other authors, and have become standard textbook material. With Richard Bishop, he applied his submersion calculations to the geometry of warped products, in addition to studying the fundamental role of convex functions and convex sets in Riemannian geometry, and for the geometry of negative sectional curvature in particular. An article with his former Ph.D. student Patrick Eberlein made a number of further contributions to the Riemannian geometry of negative curvature, including the notion of the "boundary at infinity".
Major publications
Books
Barrett O'Neill. Elementary differential geometry. Revised second edition of the 1966 original. Elsevier/Academic Press, Amsterdam, 2006. xii+503 pp.
Barrett O'Neill. Semi-Riemannian geometry. With applications to relativity. Pure and Applied Mathematics, 103. Academic Press, Inc. [Harcourt Brace Jovanovich, Publishers], New York, 1983. xiii+468 pp.
Barrett O'Neill. The geometry of Kerr black holes. A K Peters, Ltd., Wellesley, MA, 1995. xviii+381 pp.
Articles
Barrett O'Neill. The fundamental equations of a submersion. Michigan Math. J. 13 (1966), 459–469.
R.L. Bishop and B. O'Neill. Manifolds of negative curvature. Trans. Amer. Math. Soc. 145 (1969), 1–49. ;
P. Eberlein and B. O'Neill. Visibility manifolds. Pacific J. Math. 46 (1973), 45–109.
References
External links
Barrett O'Neill, UCLA
Barrett O'Neill, publications on Google scholar
https://mathscinet.ams.org/mrlookup
1924 births
2011 deaths
21st-century American mathematicians
Massachusetts Institute of Technology School of Science alumni
20th-century American mathematicians |
https://en.wikipedia.org/wiki/Da%20Silva%20%28footballer%2C%20born%201989%29 | Renildo Martins da Silva (born 20 August 1989), known as Da Silva, is a Brazilian footballer who plays for Operário–MS as defender
Career statistics
References
External links
1989 births
Living people
Brazilian men's footballers
Men's association football defenders
Campeonato Brasileiro Série A players
Campeonato Brasileiro Série D players
Tocantinópolis Esporte Clube players
Goiás Esporte Clube players
Guarani FC players
Paulista Futebol Clube players
Clube Recreativo e Atlético Catalano players
Esporte Clube Cruzeiro players
Associação Desportiva Bahia de Feira players
Associação Ferroviária de Esportes players
Guarany Sporting Club players
América Futebol Clube (GO) players
Clube Desportivo Sete de Setembro players
Operário Futebol Clube (MS) players
Sportspeople from Tocantins |
https://en.wikipedia.org/wiki/Franck%20Barthe | Franck Barthe is a French mathematician. He was awarded the European Congress of Mathematics (ECM) prize in 2004. He is working as a professor of mathematics at Paul Sabatier University.
Work
Franck Barthe is known for his reverse form of the Brascamp-Lieb inequality. With Keith M. Ball, Shiri Artstein, and Assaf Naor, he solved Shannon's problem of the monotonic entropy increase of sums of random variables.
Awards
In 2004, he received the EMS Prize (prize presentation: isoperimetric inequalities, probability measures and convex geometry) for his leading role in the application of mass-theoretical transport techniques.
In 2005, he received the Grand Prix Jacques Herbrand.
References
Living people
20th-century French mathematicians
Place of birth missing (living people)
21st-century French mathematicians
1972 births
École Normale Supérieure alumni |
https://en.wikipedia.org/wiki/Peter%20Eccles%20%28mathematician%29 | Peter John Eccles (born 6 September 1945) is a British mathematician and emeritus professor of mathematics at the University of Manchester. Eccles specialises in homotopy theory and its applications to different topology. Eccles taught a wide variety of pure mathematics throughout his career, and published the book Introduction to mathematical reasoning in 1997.
In addition to his mathematical publications, Eccles has been active in the Religious Society of Friends (Quakers) nationally and internationally throughout his adult life and was invited to give the 2009 Swarthmore Lecture, which was published as The presence in the midst: reflections on discernment.
Early life
Peter Eccles grew up in Blackpool, attending Blackpool Grammar School. He studied at Clare College, Cambridge and then later at the Victoria University of Manchester.
Eccles grew up attending Blackpool Quaker Meeting and during his teenage years developed a passionate interest in classical music, playing the piano, violin and viola as a child.
Career
From 1971 until 2015, Eccles taught in various roles at the University of Manchester, moving from Lecturer, through to Senior Lecturer, Professor and finally Emeritus Professor.
In 1971, Peter was appointed Lecturer in Mathematics at the Victoria University of Manchester, where he worked until his retirement as Professor of Mathematics in 2015. Also from 1977, through to 1978, he spent a year as Visiting Assistant Professor of Mathematics at Northwestern University, Illinois.
Whilst teaching at the University of Manchester, Eccles specialised in topology and homotopy theory, publishing numerous papers and journals on the area of study. Peter's studies specialise in areas such as multiple points of immersions of manifolds in Euclidean space. He has also taught the history of mathematics and probability theory. In 1997 Cambridge University Press published his book 'Introduction to mathematical reasoning: numbers, sets and functions’.
As a research mathematician, Eccles specialised in topology and homotopy theory, publishing numerous journal papers in this area of study[4]. Eccles's most significant contributions are concerned with the multiple points of immersions of manifolds in Euclidean space and their relationship with classical problems in the homotopy groups of spheres. His interest in this area began when he clarified the relationship between multiple points and the Hopf invariant (disproving a conjecture by Michael Freedman) and the Kervaire invariant. His teaching ranged over most areas of pure mathematics as well as the history of mathematics, relativity theory and probability theory. He became particularly interested in the transition from school to university mathematics and this led in 1967 to the publication by Cambridge University Press of his book 'Introduction to mathematical reasoning: numbers, sets and functions’.[5] which continues to be used at universities in Britain and North America.
Quakerism
P |
https://en.wikipedia.org/wiki/Thomas%20Royen | Thomas Royen (born 6 July 1947) is a retired German professor of statistics who has been affiliated with the University of Applied Sciences Bingen. Royen came to prominence in the spring of 2017 for a relatively simple proof for the Gaussian Correlation Inequality (GCI), a conjecture that originated in the 1950s, which he had published three years earlier without much recognition. A proof of this conjecture, which lies at the intersection of geometry, probability theory and statistics, had eluded top experts for decades.
Life
Youth, studies and private life
Royen was born in 1947 to Paul Royen, a professor with the institute for inorganic chemistry at the Goethe University Frankfurt and Elisabeth Royen, also a chemist. From 1966 to 1971, he studied mathematics and physics at his father's university and the University of Freiburg. After graduating, he worked as a tutor at the University of Freiburg, before transferring to the Technical University of Dortmund for his doctoral thesis. After attaining his PhD in 1975 with a thesis called Über die Konvergenz gegen stabile Gesetze (On Convergence Against Stable Laws), he worked as a Wissenschaftlicher Assistent at Dortmund University's institute for statistics. Married with children, Royen lives in Schwalbach am Taunus.
Career
In 1977, Royen started working as a statistician for the pharmaceutical company Hoechst AG. From 1979 to 1985, he worked at the company's own educational facility teaching mathematics and statistics. Starting in 1985 until becoming an emeritus in 2010, he taught statistics and mathematics at the University of Applied Sciences Bingen in Rhineland-Palatinate.
Royen worked mainly on probability distributions, in particular multivariate chi-squares and gamma distributions, to improve some frequently used statistical test procedures. Nearly half of his circa 30 publications were written when he was aged over sixty. Because he was annoyed over some contradictory reviews and in a few cases also over the incompetence of a referee, he decided in his later years, when his actions had no influence anymore on his further career, to publish his papers on the online platform arXiv.org and sometimes in a less renowned Indian journal to fulfill, at least formally, the condition of a peer review.
Proof of the Gaussian correlation inequality
On 17 July 2014, a few years after his retirement, when brushing his teeth, Royen had a flash of insight: how to use the Laplace transform of the multivariate gamma distribution to achieve a relatively simple proof for the Gaussian correlation inequality, a conjecture on the intersection of geometry, probability theory and statistics, formulated after work by Dunnett and Sobel (1955) and the American statistician Olive Jean Dunn (1958), that had remained unsolved since then. He sent a copy of his proof to Donald Richards, an acquainted American mathematician, who had worked on a proof of the GCI for 30 years. Richards immediately saw the validity of Royen |
https://en.wikipedia.org/wiki/John%20Raymond%20Wilton | John Raymond Wilton (2 May 1884 – 12 April 1944) was an Australian-born mathematician. In the period of 1926–1934 Wilton published 26 research papers on analysis and number theory. For which he gained the Doctorate in science from the University of Cambridge in 1930 and he was the first person to receive Thomas Ranken Lyle Medal in 1935 from the Australian National Research Council. On 12 April 1944, he died of a cerebral hemorrhage and was buried in West Terrace cemetery, Adelaide.
Education and scholarships
At the University of Adelaide, Wilton graduated with first-class honors in mathematics and in physics (B.Sc). Professor Sir William Bragg praised Wilton for his natural genius in mathematics among any of his students. In 1904, Wilton proceeded to Trinity College, Cambridge for B.A., 1907 and M.A., 1911. He was awarded a sizarship and won Jeston scholarship in 1905. In 1914, he received his Doctor of Science from University of Adelaide.
Career
In 1908, he joined as an assistant lecturer in the Cavendish Laboratory. Later, he worked as Lecturer in mathematics at the University of Sheffield from 1909 to 1919. In 1920, he returned to Australia and served as Professor of Mathematics at Adelaide University until his death in 1944. He was also a member of Edinburgh Mathematical Society since 1928.
Notable publications
Wilton published 26 research papers during the period of 1926–1934. Some notable publications are
On plane waves of sound (1913)
On the highest wave in deep water (1913)
On deep water waves (1914)
Figures of equilibrium of rotating fluid under the restriction that the figure is to be a surface of revolution (1914)
On the potential and force function of an electrified spherical bowl (1914–15)
On ripples (1915)
On the solution of certain problems of two-dimensional physics (1915)
A pseudo-sphere whose equation is expressible in terms of elliptic functions (1915)
A formula in zonal harmonics (1916–17)
References
1884 births
1944 deaths
20th-century Australian mathematicians
Academics of the University of Sheffield |
https://en.wikipedia.org/wiki/Guilherme%20Teixeira | Guilherme Thiago Teixeira (born 30 January 1992) is a Brazilian footballer who plays for Marília Atlético Clube as a defender.
Career statistics
References
External links
1992 births
Living people
Brazilian men's footballers
Men's association football defenders
Campeonato Brasileiro Série B players
Campeonato Brasileiro Série C players
Campeonato Brasileiro Série D players
Marília Atlético Clube players
Sociedade Esportiva Matonense players
Coimbra Sports players
Grêmio Novorizontino players
Clube Atlético Linense players
Vila Nova Futebol Clube players
Paysandu Sport Club players
Mirassol Futebol Clube players
Esporte Clube Noroeste players |
https://en.wikipedia.org/wiki/Neutron%20scattering%20length | A neutron may pass by a nucleus with a probability determined by the nuclear interaction distance, or be absorbed, or undergo scattering that may be either coherent or incoherent. The interference effects in coherent scattering can be computed via the coherent scattering length of neutrons, being proportional to the amplitude of the spherical scattered waves according to Huygens–Fresnel theory. This scattering length varies by isotope (and by element as the weighted arithmetic mean over the constituent isotopes) in a way that appears random, whereas the X-ray scattering length is just the product of atomic number and Thomson scattering length, thus monotonically increasing with atomic number.
The scattering length may be either positive or negative. The scattering cross-section is equal to the square of the scattering length multiplied by 4π, i.e. the area of a circle with radius twice the scattering length. In some cases, as with titanium and nickel, it is possible to mix isotopes of an element whose lengths are of opposite signs to give a net scattering length of zero, in which case coherent scattering will not occur at all, while for vanadium already the opposite signs of the only naturally occurring isotope's two spin configurations give a near cancellation. However, neutrons will still undergo strong incoherent scattering in these materials.
There is a large difference in scattering length between protium (-0.374) and deuterium (0.667). By using heavy water as solvent and/or selective deuteration of the probed molecule (exchanging the naturally occurring protium by deuterium) this difference can be leveraged in order to image the hydrogen configuration in organic matter, which is nearly impossible with X-rays due to their small sensitivity to hydrogen's single electron. On the other hand, neutron scattering studies of hydrogen-containing samples often suffer from the strong incoherent scattering of natural hydrogen.
More comprehensive data is available from NIST and Atominstitut of Vienna.
References
Neutron scattering |
https://en.wikipedia.org/wiki/Daniel%20Amora | Daniel Lopes Amora (born 20 October 1987) is a Brazilian footballer plays as a midfielder.
Career statistics
References
1987 births
Living people
Brazilian men's footballers
Brazilian expatriate men's footballers
Campeonato Brasileiro Série B players
Campeonato Brasileiro Série C players
Saudi Pro League players
UAE Pro League players
Saudi First Division League players
Águia de Marabá Futebol Clube players
Grêmio Barueri Futebol players
Paysandu Sport Club players
Guaratinguetá Futebol players
América Futebol Clube (RN) players
ABC Futebol Clube players
São Bernardo Futebol Clube players
Sampaio Corrêa Futebol Clube players
Al Raed FC players
Hatta Club players
Al-Tai FC players
Expatriate men's footballers in Saudi Arabia
Expatriate men's footballers in the United Arab Emirates
Brazilian expatriate sportspeople in Saudi Arabia
Brazilian expatriate sportspeople in the United Arab Emirates
Men's association football midfielders
Footballers from Belo Horizonte |
https://en.wikipedia.org/wiki/Lifting%20property | In mathematics, in particular in category theory, the lifting property is a property of a pair of morphisms in a category. It is used in homotopy theory within algebraic topology to define properties of morphisms starting from an explicitly given class of morphisms. It appears in a prominent way in the theory of model categories, an axiomatic framework for homotopy theory introduced by Daniel Quillen. It is also used in the definition of a factorization system, and of a weak factorization system, notions related to but less restrictive than the notion of a model category. Several elementary notions may also be expressed using the lifting property starting from a list of (counter)examples.
Formal definition
A morphism in a category has the left lifting property with respect to a morphism , and also has the right lifting property with respect to , sometimes denoted or , iff the following implication holds for each morphism and in the category:
if the outer square of the following diagram commutes, then there exists completing the diagram, i.e. for each and such that there exists such that and .
This is sometimes also known as the morphism being orthogonal to the morphism ; however, this can also refer to
the stronger property that whenever and are as above, the diagonal morphism exists and is also required to be unique.
For a class of morphisms in a category, its left orthogonal or with respect to the lifting property, respectively its right orthogonal or , is the class of all morphisms which have the left, respectively right, lifting property with respect to each morphism in the class . In notation,
Taking the orthogonal of a class is a simple way to define a class of morphisms excluding non-isomorphisms from , in a way which is useful in a diagram chasing computation.
Thus, in the category Set of sets, the right orthogonal of the simplest non-surjection is the class of surjections. The left and right orthogonals of the simplest non-injection, are both precisely the class of injections,
It is clear that and . The class is always closed under retracts, pullbacks, (small) products (whenever they exist in the category) & composition of morphisms, and contains all isomorphisms (that is, invertible morphisms) of the underlying category. Meanwhile, is closed under retracts, pushouts, (small) coproducts & transfinite composition (filtered colimits) of morphisms (whenever they exist in the category), and also contains all isomorphisms.
Examples
A number of notions can be defined by passing to the left or right orthogonal several times starting from a list of explicit examples, i.e. as , where is a class consisting of several explicitly given morphisms. A useful intuition is to think that the property of left-lifting against a class is a kind of negation
of the property of being in , and that right-lifting is also a kind of negation. Hence the classes obtained from by taking orthogonals an odd number of times, such as |
https://en.wikipedia.org/wiki/Jean-%C3%89ric%20Pin | Jean-Éric Pin is a French mathematician and theoretical computer scientist known for his contributions to the algebraic automata theory and semigroup theory. He is a CNRS research director.
Biography
Pin earned his undergraduate degree from ENS Cachan in 1976 and his doctorate (Doctorat d'état) from the Pierre and Marie Curie University in 1981. Since 1988 he has been a CNRS research director at Paris Diderot University. In the years 1992–2006 he was a professor at École Polytechnique.
Pin is a member of the Academia Europaea (2011) and an EATCS fellow (2014).
In 2018, Pin became the first recipient of the Salomaa Prize in Automata Theory, Formal Languages, and Related Topics.
References
External links
Personal page
1947 births
Living people
French mathematicians
French computer scientists
Theoretical computer scientists
Members of Academia Europaea
Research directors of the French National Centre for Scientific Research |
https://en.wikipedia.org/wiki/Dan%20Peter%20Ulvestad | Dan Peter Ulvestad (born 4 April 1989) is a Norwegian footballer who plays for Eliteserien club Kristiansund.
Career statistics
Club
References
1989 births
Living people
Footballers from Ålesund
Norwegian men's footballers
Eliteserien players
Norwegian First Division players
Aalesunds FK players
Kristiansund BK players
Men's association football defenders |
https://en.wikipedia.org/wiki/Andreas%20Hopmark | Andreas Eines Hopmark (born 6 July 1991) is a Norwegian footballer who plays for Eliteserien club Kristiansund.
Career statistics
References
1991 births
Living people
Sportspeople from Kristiansund
Footballers from Møre og Romsdal
Norwegian men's footballers
Eliteserien players
Norwegian First Division players
Kristiansund BK players
Men's association football defenders |
https://en.wikipedia.org/wiki/Sondre%20S%C3%B8rli | Sondre Sørli (born 30 October 1995) is a Norwegian professional footballer who plays as a midfielder for Bodø/Glimt.
Career statistics
Club
Honours
Bodø/Glimt
Eliteserien: 2021
References
1995 births
Living people
Sportspeople from Kristiansund
Footballers from Møre og Romsdal
Norwegian men's footballers
Men's association football midfielders
Eliteserien players
Norwegian First Division players
Kristiansund BK players
FK Bodø/Glimt players |
https://en.wikipedia.org/wiki/Gaussian%20correlation%20inequality | The Gaussian correlation inequality (GCI), formerly known as the Gaussian correlation conjecture (GCC), is a mathematical theorem in the fields of mathematical statistics and convex geometry.
The statement
The Gaussian correlation inequality states:
Let be an n-dimensional Gaussian probability measure on , i.e. a multivariate normal distribution, centered at the origin. Then for all convex sets that are symmetric about the origin,
As a simple example for n=2, one can think of darts being thrown at a board, with their landing spots in the plane distributed according to a 2-variable normal distribution centered at the origin. (This is a reasonable assumption for any given darts player, with different players being described by different normal distributions.) If we now consider a circle and a rectangle in the plane, both centered at the origin, then the proportion of the darts landing in the intersection of both shapes is no less than the product of the proportions of the darts landing in each shape. This can also be formulated in terms of conditional probabilities: if you're informed that your last dart hit the rectangle, then this information will increase your estimate of the probability that the dart hit the circle.
History
A special case of the inequality was conjectured in 1955; further development was given by Olive Jean Dunn in 1958. The general case was stated in 1972, also as a conjecture. The case of dimension n=2 was proved in 1977 and certain special cases of higher dimension have also been proven in subsequent years.
The general case of the inequality remained open until 2014, when Thomas Royen, a retired German statistician, proved it using relatively elementary tools. In fact, Royen generalized the conjecture and proved it for multivariate gamma distributions. The proof did not gain attention when it was published in 2014, due to Royen's relative anonymity and the fact that the proof was published in a predatory journal. Another reason was a history of false proofs (by others) and many failed attempts to prove the conjecture, causing skepticism among mathematicians in the field.
The conjecture, and its solution, came to public attention in 2017, when other mathematicians described Royen's proof in a mainstream publication and popular media reported on the story.
References
External links
George Lowther, The Gaussian Correlation Conjecture, "Almost Sure"
Gaussian function
Geometric inequalities
Probabilistic inequalities |
https://en.wikipedia.org/wiki/Photomath | Photomath is an educational technology mobile app owned by Google. It is a computer algebra system with an augmented optical character recognition system designed for use with a smartphone's camera to scan and recognize mathematical equations; the app then displays step-by-step explanations onscreen.
The app is based on a text recognition engine developed by Microblink, a company based in London and Croatia, and led by founder Damir Sabol, which also includes the same people who are developing both Photomath and Photopay. The company Photomath LLC was legally registered in San Mateo, California, and, in 2021, the company announced $23 million in Series B funding led by Menlo Ventures, with participation from GSV Ventures, Learn Capital, Cherubic Ventures and Goodwater Capital.
In May 2022, Google announced it would acquire the company for an undisclosed amount. The deal was then reviewed by the European Commission and approved in March 2023, before the deal was closed in June. The takeover was the largest startup acquisition in the history of Croatia, as Photomath had been the country's most popular app. The deal was cited as part of Google's response to ChatGPT. With the dissolution of Photomath as a company, Sabol assumed the position of Director of Software Engineering at Google.
Description
Photomath uses the camera on a user's smartphone or tablet to scan and recognize a math problem. Once the problem is recognized, the app will display solving steps, sometimes in a variety of methods or multiple approaches, to explain the scanned problem step-by-step and teach users the correct process. Photomath's in-house math R&D team researches teaching methodologies from around the world, and solutions and solving steps are expert-verified.
In 2016, the app began recognizing handwriting in addition to printed text, enabling students to scan in textbooks and hand-written math notes.
In 2017, The Tech Edvocate named Photomath among its top 20 teaching and learning apps.
Photomath's main features are generally free of charge. Photomath offers an additional premium subscription, 'Photomath Plus', for users who want extra help, with things like mathematical word problems, or worked textbook solutions.
As of 2021, the app has over 220 million downloads worldwide, with the official website claiming that it solves 2.2 billion problems per month and that over 1 million teachers use the app.
References
External links
2014 software
Android (operating system) software
Companies based in Zagreb
Croatian brands
Google acquisitions
IOS software
Mobile applications
Mathematical software
Photo software |
https://en.wikipedia.org/wiki/IPTraf | IPTraf is a software - based console that provides network statistics. It works by collecting information from TCP connections, such as statistics and activity interfaces and drops TCP and UDP traffic. It is available in Linux operating systems.
Features
In addition to a menu of options to full screen, IPTraf has the following characteristics:
IP traffic monitor displays information about network traffic.
General statistics Interfaces.
LAN statistics module that discovers s host displays data about their activity.
Monitor TCP, UDP account showing the network packets for port connections of applications.
Use the "raw socket interface" that takes kernel allowing it to be used by a wide range of "network cards".
Recognized protocols
IPTtraf supports multiple protocols:
IP
TCP
UDP
ICMP
IGP
IGMP
IGRP
OSPF
ARP
RARP
Supported interfaces
IPTraf supports a wide range of network interfaces:
Local loopback
All Ethernet interfaces supported by Linux.
All FDDI interfaces supported by Linux.
SLIP
Asynchronous PPP
Synchronous PPP over ISDN
ISDN with encapsulation Raw IP
ISDN with encapsulation Cisco HDLC
Parallel Line IP.
Data structures
The main data structures using the various facilities of the program are in doubly linked list, which facilitates their movement. The maximum number of entries is limited only by available memory. Search operations in most of the facilities are carried out linearly, a fact that causes a mild but almost imperceptible impact. Because of the speed with which tends to increase the traffic monitor IPs, it use a hash table to perform searches more efficiently. (Search operations are carried out whenever the program needs to check if it is already listed the Ethernet or IP address or protocol or network port.
In addition, it has a folding mechanism links merely contains notes on old entries that are available for reuse. Every time a connection is restarted or completely closed, the ticket information is not released, but added an entry to the closed-list. By detecting a new connection, the list is checked and if it is not empty, the first entry in use that is available will be reused, then, clear the list-closed
References
External links
IPTraf web site
IPTraf-ng, current fork of IPtraf
Free software
Linux software |
https://en.wikipedia.org/wiki/Saeed%20Al%20Sulaiti | Saeed Al Sulaiti (born 21 March 1985) is a Qatari motorcycle racer. He made his Grand Prix debut in the Moto2 class as a wild-card rider in the 2017 Qatar Grand Prix.
Career statistics
Superbike World Championship
Races by year
(key)
Grand Prix motorcycle racing
By season
Races by year
(key)
Supersport World Championship
Races by year
(key)
References
External links
1985 births
Living people
Qatari motorcycle racers
Moto2 World Championship riders
Superbike World Championship riders
Supersport World Championship riders
Sportspeople from Doha |
https://en.wikipedia.org/wiki/Hyperexponential | Hyperexponential can refer to:
The hyperexponential distribution in probability.
Tetration, also known as hyperexponentiation. |
https://en.wikipedia.org/wiki/Bryan%20Cesar | Bryan Cesar Ramadhan (born 16 March 1993) is an Indonesian professional footballer who plays as a midfielder for Liga 2 club PSIM Yogyakarta.
Career statistics
Club
Honours
PSM Makassar
Liga 1: 2022–23
References
External links
Bryan Cesar at Liga Indonesia
1993 births
Living people
People from Balikpapan
Persiba Balikpapan players
PSM Makassar players
PSIM Yogyakarta players
Liga 1 (Indonesia) players
Liga 2 (Indonesia) players
Footballers from East Kalimantan
Indonesian men's footballers
Men's association football midfielders |
https://en.wikipedia.org/wiki/Complete%20topological%20vector%20space | In functional analysis and related areas of mathematics, a complete topological vector space is a topological vector space (TVS) with the property that whenever points get progressively closer to each other, then there exists some point towards which they all get closer.
The notion of "points that get progressively closer" is made rigorous by or , which are generalizations of , while "point towards which they all get closer" means that this Cauchy net or filter converges to
The notion of completeness for TVSs uses the theory of uniform spaces as a framework to generalize the notion of completeness for metric spaces.
But unlike metric-completeness, TVS-completeness does not depend on any metric and is defined for TVSs, including those that are not metrizable or Hausdorff.
Completeness is an extremely important property for a topological vector space to possess.
The notions of completeness for normed spaces and metrizable TVSs, which are commonly defined in terms of completeness of a particular norm or metric, can both be reduced down to this notion of TVS-completeness – a notion that is independent of any particular norm or metric.
A metrizable topological vector space with a translation invariant metric is complete as a TVS if and only if is a complete metric space, which by definition means that every -Cauchy sequence converges to some point in
Prominent examples of complete TVSs that are also metrizable include all F-spaces and consequently also all Fréchet spaces, Banach spaces, and Hilbert spaces.
Prominent examples of complete TVS that are (typically) metrizable include strict LF-spaces such as the space of test functions with it canonical LF-topology, the strong dual space of any non-normable Fréchet space, as well as many other polar topologies on continuous dual space or other topologies on spaces of linear maps.
Explicitly, a topological vector spaces (TVS) is complete if every net, or equivalently, every filter, that is Cauchy with respect to the space's necessarily converges to some point. Said differently, a TVS is complete if its canonical uniformity is a complete uniformity.
The canonical uniformity on a TVS is the unique translation-invariant uniformity that induces on the topology
This notion of "TVS-completeness" depends on vector subtraction and the topology of the TVS; consequently, it can be applied to all TVSs, including those whose topologies can not be defined in terms metrics or pseudometrics.
A first-countable TVS is complete if and only if every Cauchy sequence (or equivalently, every elementary Cauchy filter) converges to some point.
Every topological vector space even if it is not metrizable or not Hausdorff, has a , which by definition is a complete TVS into which can be TVS-embedded as a dense vector subspace. Moreover, every Hausdorff TVS has a completion, which is necessarily unique up to TVS-isomorphism. However, as discussed below, all TVSs have infinitely many non-Hausdorff compl |
https://en.wikipedia.org/wiki/Teresa%20W.%20Haynes | Teresa W. Haynes (born 1953) is an American professor of mathematics and statistics at East Tennessee State University known for her research in graph theory and particularly on dominating sets.
Education and career
Haynes earned three degrees from Eastern Kentucky University: a B.S. in mathematics and education in 1975, M.A. in mathematics and education in 1978, and M.S. in mathematical sciences in 1984. She completed her Ph.D. in computer science in 1988 from the University of Central Florida. Her dissertation was On --Insensitive Domination and was supervised by Robert C. Brigham.
Haynes worked as a mathematics teacher from 1975 to 1978 and as a telephone engineer from 1978 to 1981. She became a mathematics and computer science instructor at Pikeville College in 1981, and moved to Prestonburg Community College in 1983.
After completing her doctorate in 1988, she became an assistant professor at East Tennessee State, and she was promoted to full professor there in 1999.
Books
Haynes is the author of two books on dominating sets in graph theory:
References
External links
1953 births
Living people
American women mathematicians
Mathematicians from Tennessee
Eastern Kentucky University alumni
University of Central Florida alumni
University of Pikeville faculty
East Tennessee State University faculty
Graph theorists
21st-century American women |
https://en.wikipedia.org/wiki/Mats%20Haakenstad | Mats Haakenstad (born 14 November 1993) is a Norwegian footballer who plays as right back who plays for Kongsvinger.
Career statistics
Club
References
External links
Mats Haakenstad at NFF
1993 births
Living people
Norwegian men's footballers
Norwegian expatriate men's footballers
Eliteserien players
Norwegian First Division players
Veikkausliiga players
Kakkonen players
IF Fram Larvik players
Sandefjord Fotball players
Lillestrøm SK players
Kuopion Palloseura players
SC Kuopio Futis-98 players
Men's association football defenders
Norwegian expatriate sportspeople in Finland
Expatriate men's footballers in Finland
Sportspeople from Horten
Footballers from Vestfold og Telemark |
https://en.wikipedia.org/wiki/Glissette | In geometry, a glissette is a curve determined by either the locus of any point, or the envelope of any line or curve, that is attached to a curve that slides against or along two other fixed curves.
Examples
Ellipse
A basic example is that of a line segment of which the endpoints slide along two perpendicular lines. The glissette of any point on the line forms an ellipse.
Astroid
Similarly, the envelope glissette of the line segment in the example above is an astroid.
Conchoid
Any conchoid may be regarded as a glissette, with a line and one of its points sliding along a given line and fixed point.
References
External links
Glissette at Wolfram Mathworld
Curves |
https://en.wikipedia.org/wiki/Raymond%20L.%20Johnson | Raymond Lewis Johnson (born 1943) is an American mathematician, currently a professor emeritus at the University of Maryland, College Park and an adjunct professor of mathematics at Rice University. He was the first African-American student at Rice University, and the first African-American mathematics professor at the University of Maryland. His research concerns non-well-posed problems and harmonic analysis.
Early life and education
Johnson was born on 25 June 1943 in Alice, Texas and educated in a small segregated schoolhouse, with children in four different grades in each of its two rooms. Because he had been taught by his grandfather how to read and do arithmetic, he skipped two grades of school. After the 1954 Brown v. Board of Education decision, desegregating public schools, he was allowed to attend the formerly-all-white secondary schools in Alice, beginning in the ninth grade. Shortly afterwards, the Soviet launch of Sputnik in 1957 and the ensuing Space Race led to the development of high school enrichment programs in science and mathematics, in which Johnson participated.
Johnson earned a National Merit Scholarship, which he used to attend the University of Texas at Austin. Johnson writes that he "decided to major in math because it was one of the things I had enjoyed most in high school and there was no hope of my really understanding physics." His high school mathematics teacher, Larry O'Rear, had been advised by mathematics professor Howard B. Curtis, and Curtis also became a mentor to Johnson, with much of his mathematical education accomplished through independent study advised by Curtis. Another role model at Texas was Vivienne Malone-Mayes, an African-American graduate student in mathematics and the grader for a linear algebra course taken by Johnson. However, Johnson was advised to avoid the courses of Robert Lee Moore, "the real head of the pure math department", who was famous for his mentorship of young mathematicians but also notorious for his racism.
On completing his undergraduate studies, Curtis suggested that Johnson continue as a graduate student at Rice University. Rice's founding charter was to serve only the white citizens of Texas, but the university had determined to break both its racial and its state-based restrictions. Johnson was admitted to Rice in 1963, as its first African-American student, but his admission was delayed until 1964 by a lawsuit against the university by two alumni who did not want this change to happen. Johnson worked at Rice for a year as a research associate before becoming a regular graduate student. He then discovered that he was being paid less than the other graduate students, and almost left again, but continued after obtaining an NSF graduate fellowship. At Rice, Johnson met his future wife, Claudette, then a sociology student at Texas Southern University, through their shared participation in protests during the Civil Rights Movement. He was advised by Jim Douglas, Jr., who move |
https://en.wikipedia.org/wiki/David%20Rytz | David Rytz von Brugg (1 April 1801, in Bucheggberg – 25 March 1868, in Aarau) was a Swiss mathematician and teacher.
Life
Rytz von Brugg was son of a priest and studied mathematics at Göttingen and Leipzig. He had teaching positions at various cities, one of them 1835 until 1862 at Aarau, where he was „Professor der Mathematik an der Gewerbeschule zu Aarau“.
Merits
Rytz von Brugg is famous for a geometrical method which is known as Rytz’s axis construction. This classical procedure retrieves the semi-axes of an Ellipse from any pair of conjugate diameters. This method is known since 1845, when it was published within a paper by Leopold Moosbrugger.
Sources
MR1089881
MR2918594
References
1801 births
1868 deaths
Swiss mathematicians |
https://en.wikipedia.org/wiki/Stevan%20Pilipovi%C4%87 | Stevan Pilipović (born 1950, Novi Sad, Serbia) is a Professor of Mathematics, since 1987, at the Department of Mathematics and Informatics of Novi Sad University.
Biography
Since 2009, he is an academician of the Serbian Academy of Sciences and Arts. His research interests include functional analysis, generalized functions and hyperfunctions, pseudo-differential operators, time–frequency analysis, linear and nonlinear equations with singularities. Probability theory and stochastic processes. Moreover, he is also interested in applications of mathematics in mechanics with applications in medicine. Currently he is a president of the Novi Sad Branch of the Serbian Academy of Sciences and Arts and the leader of the Center of excellence Center for Mathematical Research in Nonlinear Phenomena at the Faculty of Science of Novi Sad University. He is Editor in chief of Publ. Inst. Math. (Beograd), NSJOM – Novi Sad Journal of Mathematics (Novi Sad).
Bibliography
Pilipović, S., Stanković, B., Takači, A., Asymptotic of Generalized Functions and the Stieltjes Transformation of Distributions, Teubner Texte zur Mathematik, Band 116, 1990.
Nedeljkov, M., Pilipović, S., Scarpalezos, D., Linear Theory of Colombeau's Generalized Functions, Addison Wesley, Longman, 1998.
Carmichael, R., Kaminski, A., Pilipović, S., Boundary Values and Convolution in Ultradistribution Spaces, ISAAC Series on Analysis Applications and Computations, Vol. 1, World Scientific, 2007.
Pilipović, S., Stanković, B., Vindas, J., Asymptotic behavior of generalized functions. Series on Analysis, Applications and Computation, 5. World Scientific Publishing Co. Pte. Ltd., Hackensack, NJ, 2012.
Atanacković, T. M., Pilipović, S., Stanković, B., Zorica, D., Fractional Calculus with Applica-tions in Mechanics: Vibrations and Diffusion Processes, ISTE – Wiley, 2014, London.
Atanacković, T. M., Pilipović, S., Stanković, B., Zorica, Fractional Calculus with Applications in Mechanics: Wave Propagation, Impact and Variational Principles, ISTE – Wiley, 2014, London.
References
1950 births
Living people
Members of the Serbian Academy of Sciences and Arts
University of Novi Sad
Serbian mathematicians |
https://en.wikipedia.org/wiki/Dan%20Halperin | Daniel Halperin is an Israeli computer scientist specializing in computational geometry and robot motion planning. He is a professor of computer science at Tel Aviv University.
Education and career
Halperin completed his Ph.D. at Tel Aviv University in 1992, under the supervision of Micha Sharir. His dissertation was Algorithmic Motion Planning via Arrangements of Curves and of Surfaces. After postdoctoral research at Stanford University, he returned to Tel Aviv University as a faculty member in 1996.
Recognition
Halperin was named as an IEEE Fellow in 2015, "for contributions to robust geometric algorithms for robotics and automation", and is a distinguished lecturer of the IEEE Robotics and Automation Society. He was named as a Fellow of the Association for Computing Machinery in 2018, "for contributions to robust geometric computing and applications to robotics and automation".
References
External links
Archived home page
Year of birth missing (living people)
Living people
Israeli computer scientists
Tel Aviv University alumni
Academic staff of Tel Aviv University
Researchers in geometric algorithms
Fellow Members of the IEEE
Fellows of the Association for Computing Machinery |
https://en.wikipedia.org/wiki/Risk%20score | Risk score (or risk scoring) is the name given to a general practice in applied statistics, bio-statistics, econometrics and other related disciplines, of creating an easily calculated number (the score) that reflects the level of risk in the presence of some risk factors (e.g. risk of mortality or disease in the presence of symptoms or genetic profile, risk financial loss considering credit and financial history, etc.).
Risk scores are designed to be:
Simple to calculate: In many cases all you need to calculate a score is a pen and a piece of paper (although some scores use rely on more sophisticated or less transparent calculations that require a computer program).
Easily interpreted: The result of the calculation is a single number, and higher score usually means higher risk. Furthermore, many scoring methods enforce some form of monotonicity along the measured risk factors to allow a straight forward interpretation of the score (e.g. risk of mortality only increases with age, risk of payment default only increase with the amount of total debt the customer has, etc.).
Actionable: Scores are designed around a set of possible actions that should be taken as a result of the calculated score. Effective score-based policies can be designed and executed by setting thresholds on the value of the score and associating them with escalating actions.
Formal definition
A typical scoring method is composed of 3 components:
A set of consistent rules (or weights) that assign a numerical value ("points") to each risk factor that reflect our estimation of underlying risk.
A formula (typically a simple sum of all accumulated points) that calculates the score.
A set of thresholds that helps to translate the calculated score into a level of risk, or an equivalent formula or set of rules to translate the calculated score back into probabilities (leaving the nominal evaluation of severity to the practitioner).
Items 1 & 2 can be achieved by using some form of regression, that will provide both the risk estimation and the formula to calculate the score. Item 3 requires setting an arbitrary set of thresholds and will usually involve expert opinion.
Estimating risk with GLM
Risk score are designed to represent an underlying probability of an adverse event denoted given a vector of explaining variables containing measurements of the relevant risk factors. In order to establish the connection between the risk factors and the probability we estimate a set of weights is estimated using a generalized linear model:
Where is a real-valued, monotonically increasing function that maps the values of the linear predictor to the interval . GLM methods typically uses the logit or probit as the link function.
Estimating risk with other methods
While it's possible to estimate using other statistical or machine learning methods, the requirements of simplicity and easy interpretation (and monotonicity per risk factor) make most of these methods difficult to use |
https://en.wikipedia.org/wiki/Romanians%20in%20Germany | Romanians in Germany are one of the sizable communities of the Romanian diaspora in Western Europe. According to German statistics, in 2022, the number of Romanian citizens in Germany was 883,670. The number of people with Romanian ancestry in 2022 (defined as all persons who migrated to the present area of the Federal Republic of Germany after 1949, plus all foreign nationals born in Germany and all persons born in Germany as German nationals with at least one parent who migrated to Germany or was born in Germany as a foreign national) was 1,096,000.
History
Emigration to Germany from Romania was common throughout the 20th century, and continued steadily way into the early 21st century. Large numbers of ethnic Germans of Romania (most notably Transylvanian Saxons and Banat Swabians) left the country prior, during, and after the events that ultimately led to World War II.
In the times of the communist regime in Romania, albeit the borders were officially closed by authorities, significant numbers of Romanian-Germans were allowed to emigrate to West Germany, particularly in the later years of the Ceaușescu era. This formed part of a series of ethnic migrations (including Jews to Israel and Hungarians to Hungary), which were tolerated under the then socialist rulership. During the 1980s, more than half of the people who left Romania went to Germany.
After the Romanian Revolution which took place in December of 1989, there has been a mass migration of Transylvania Saxons to Germany, approximately half a million of them immigrated to Germany.
Emigration of ethnic Romanians to Germany become quite common in the 21st century, particularly after the entry of Romania in the European Union in 2007. The Romanian diaspora in Germany has a strong presence. If descent is actually taken into account as the main criterion of immigration, then the total number of individuals living in Germany who stem from Romania (both Romanian-German and Romanian) may amount to as much as 2,000,000 residents, therefore putting the Romanian diaspora living in this country the largest of all Romanian ones living within the European Union.
Distribution
According to German statistics from 2016, the number of Romanian citizens in Germany on 31 December 2015 was 452,718, which was up from 94,326 in 2008. By 2022, the number had increased to 883,670 Romanian citizens.
The distribution of Romanian citizens by German states is as follows (as of 2022):
Bayern 209,865
Baden-Württemberg 178,240
Nordrhein-Westfalen 164,220
Hessen 82,010
Niedersachsen 74,805
Rheinland-Pfalz 48,975
Berlin 27,990
Schleswig-Holstein 20,210
Sachsen 15,120
Thüringen 13,475
Sachsen-Anhalt 10,740
Saarland 9,870
Hamburg 9,790
Brandenburg 8,730
Mecklenburg-Vorpommern 5,570
Bremen 4,060
Notable people
Art
, painter
Adrian Ghenie, painter
Petre Hârtopeanu (1913–2001), painter
Diet Sayler, painter and sculptor
George Ștefănescu (1914–2007), painter
Entertainment
Ingrid Bisu, actress
Mircea Crișan (1924–2 |
https://en.wikipedia.org/wiki/Harry%20Trentelman | Harry Trentelman is a full professor in Systems and Control at the Johann Bernoulli Institute for Mathematics and Computer Science of the University of Groningen. From 1985 to 1991 he served as an assistant professor and as an associate professor at the Mathematics Department of the Eindhoven University of Technology, the Netherlands. He obtained his PhD degree in Mathematics from the University of Groningen in 1985. His Ph.D. thesis was titled "Almost Invariant Subspaces and High Gain Feedback Mathematics Subject Classification: 93—Systems theory; control" which he defended following studying for it under mentorship from Jan Camiel Williams.
Trentelman serves as a senior editor of the IEEE Transactions on Automatic Control and as an associate editor of Automatica. He is past associate editor of the SIAM Journal on Control and Optimization and Systems and Control Letters. Trentelman was named Fellow of the Institute of Electrical and Electronics Engineers (IEEE) in 2015 for "contributions to geometric theory of linear systems and behavioral models".
References
External links
1956 births
Living people
Dutch mathematicians
Academic staff of the Eindhoven University of Technology
Fellow Members of the IEEE
Place of birth missing (living people) |
https://en.wikipedia.org/wiki/Jinde%20Cao | Jinde Cao is an Endowed Chair Professor at Southeast University, Nanjing, China. He is a Distinguished Professor, the Dean of School of Mathematics and the Director of the Research Center for Complex Systems and Network Sciences at Southeast University.
Education and career
Cao obtained his B.S. in mathematics from Anhui Normal University in 1986. He then studied applied mathematics at Yunnan University, graduating from it with M.S. in 1989 and in 1998 got his Ph.D. in the same field from Sichuan University. From 1996 to 2000, he was a professor at Yunnan University, and from July 2001 to June 2002 served as postdoc at the Department of Automation and Computer-Aided Engineering Faculty of Engineering of the Chinese University of Hong Kong. Between July 2006 and August 2008, Cao was a Royal Society Research Fellow at Brunel University in the United Kingdom and in 2014 became visiting professor at the RMIT Universityin Australia.
Awards and recognitions
Cao was named a Foreign Fellow of the Pakistan Academy of Sciences in 2016, and the same year was awarded IEEE Fellowship for contributions to the analysis of neural networks. The same year, he also became a foreign member of the Academia Europaea and in 2018 became a member of the European Academy of Sciences and Arts. In 2019 was awarded with the Obada Prize.
References
External links
20th-century births
Living people
Chinese mathematicians
Anhui Normal University alumni
Yunnan University alumni
Sichuan University alumni
Academic staff of RMIT University
Academic staff of Southeast University
Fellow Members of the IEEE
Members of Academia Europaea
Members of the European Academy of Sciences and Arts
Year of birth missing (living people)
Place of birth missing (living people)
Foreign Fellows of Pakistan Academy of Sciences
Associate Fellows of the African Academy of Sciences |
https://en.wikipedia.org/wiki/Joan%20Ferrini-Mundy | Joan Ferrini-Mundy (born 1954) is a mathematics educator. Her research interests include calculus teaching and learning, mathematics teacher learning, and STEM education policy. She is currently the president of the University of Maine.
Career and research
Ferrini-Mundy earned a Ph.D. in mathematics education from the University of New Hampshire (UNH) in 1980 and spent two years there as a postdoctoral associate. After one year at Mount Holyoke College, she returned to UNH as a faculty member in mathematics until joining the faculty of Michigan State University in 1999. One year later, she chaired the writing group for Standards 2000, a publication from the National Council of Teachers of Mathematics.
In 2007, Ferrini-Mundy joined the National Science Foundation (NSF) as the director of the new Division of Research on Learning in Formal and Informal Settings in the Directorate for Education and Human Resources; she remained a faculty member at Michigan State until 2010. From 2007 to 2009, she served on the education subcommittee of the National Science and Technology Council.
In February 2011, Ferrini-Mundy became the assistant director of the National Science Foundation's Directorate for Education and Human Resources. In this strategic role, she set the NSF's direction for scientific education. In 2014 she was elected to the executive committee of the Association for Women in Mathematics for a 2-year term.
In June 2017, she was appointed the chief operating officer of the NSF. One year later, she left the NSF to become the 21st president of the University of Maine.
Awards and recognition
In 2000, Ferrini-Mundy was the recipient of the Association for Women in Mathematics' Louise Hay Award.
In 2011, Ferrini-Mundy was elected as a Fellow at the American Association for the Advancement of Science
She was elected to the 2018 class of fellows of the American Mathematical Society.
References
External links
American educators
American women mathematicians
Living people
1954 births
Fellows of the American Mathematical Society
University of New Hampshire alumni
Mount Holyoke College faculty
University of New Hampshire faculty
Michigan State University faculty
Presidents of the University of Maine
21st-century American women
Women heads of universities and colleges |
https://en.wikipedia.org/wiki/Catherine%20A.%20Roberts | Catherine A. Roberts (born February 5, 1965) is an American mathematician who serves as the executive director of the American Mathematical Society. She is a professor of mathematics at the College of the Holy Cross.
Biography
Roberts was born in 1965 in Boston, Massachusetts. Her family subsequently moved to Cape Cod, Massachusetts, where her father opened a law practice and her mother became an important civic leader and social advocate in the community. Roberts and her spouse, a chemistry professor at Worcester Polytechnic Institute, have two sons.
Education
Roberts graduated from Bowdoin College in 1987 with a Bachelor of Arts, magna cum laude, in mathematics and art history, along with a teacher certification in math. She graduated from Northwestern University in 1992 with a Ph.D. in applied mathematics and engineering sciences.
Professional career
Roberts was an assistant professor of mathematics at the University of Rhode Island from 1992 until 1995. She then was appointed an assistant professor at Northern Arizona University from 1995 to 1998 and from 1998 to 2001 she worked as an associate professor at the university. Roberts was appointed an associate professor at the College of the Holy Cross from 2001 to 2013, full professor from 2013 to 2018, and faculty associate starting in 2018. From 2004 to 2016 she served as the Editor-in-Chief of the Natural Resource Modeling journal. From 2016-2023, Roberts served as the executive director of American Mathematical Society. In this capacity, she led the Society through a multi-year strategic plan resulting in the introduction of new branding (including a logo and the tag line "Advancing Research. Creating Connections.", and the establishment of offices of Membership, Communications, and Equity/Diversity/Inclusion. Under her leadership, several new prizes, awards, and programs were developed, including the Next Generation Fund and the journal Communications of the AMS.
Recognition
Roberts was selected as a Fellow of the Association for Women in Mathematics in the Class of 2021 "for leadership in the AWM and the American Mathematical Society; and for promoting women in mathematics at every career stage, both by mentoring individuals to become strong and confident mathematicians and by working for systemic change".
References
American women mathematicians
Northwestern University alumni
College of the Holy Cross faculty
University of Rhode Island faculty
Northern Arizona University faculty
Living people
1965 births
Fellows of the Association for Women in Mathematics
21st-century American women |
https://en.wikipedia.org/wiki/Deanna%20Haunsperger | Deanna Haunsperger (born 1964) is an American mathematician and Professor of Mathematics at Carleton College.
She was the president of the Mathematical Association of America for the 2017–2018 term.
She co-created and co-organized the Carleton College Summer Mathematics Program for Women, which ran every summer from 1995 to 2014.
Education
Haunsperger received her Bachelor of Arts in mathematics and computer science from Simpson College in 1986. She received her Masters in mathematics in 1989 and her Ph.D. in mathematics in 1991 from Northwestern University.
Her dissertation was entitled Projection and Aggregation Paradoxes in Nonparametrical Statistical Tests and her advisor was Donald Gene Saari.
Career
Haunsperger was an assistant professor of mathematics at St. Olaf College from 1991 to 1994.
Since 1994, she has been a faculty member in the mathematics department at Carleton College.
From 1995 to 2014, Haunsperger directed the Carleton College Summer Mathematics Program for Women. This program worked to prepare undergraduate women to pursue a Ph.D. in mathematics.
Awards and honors
From 1999 to 2003, Haunsperger was a co-editor of Math Horizons, a magazine aimed at undergraduate students who are interested in mathematics.
Haunsperger was the second vice-president of the Mathematical Association of America (MAA) from 2006 to 2008. She was elected president of the MAA for the 2017–2018 term.
Haunsperger has won several awards from the Association for Women in Mathematics (AWM). In 2012, she was selected for the M. Gweneth Humphreys Award, which recognizes mathematics educators who have exhibited outstanding mentorship.
She was presented with the second annual AWM Presidential Award in 2017.
In 2017, she was selected as a fellow of the AWM in the inaugural class. She is the 2021 winner of the Yueh-Gin Gung and Dr. Charles Y. Hu Award for Distinguished Service to Mathematics of the Mathematical Association of America "for her prolific service to mathematics, including with the Mathematical Association of America; for her influential leadership of women in mathematics; for her long focus on inclusion and on building inclusive mathematical communities; and for a laudable career that has been rich in mathematical research, mathematical education, and mathematical exposition".
References
External links
Deanna Haunsperger's Author Profile Page on MathSciNet
American women mathematicians
Living people
1964 births
Presidents of the Mathematical Association of America
Carleton College faculty
St. Olaf College faculty
Simpson College alumni
Fellows of the Association for Women in Mathematics
20th-century American mathematicians
20th-century women mathematicians
21st-century American mathematicians
21st-century women mathematicians |
https://en.wikipedia.org/wiki/Shihoko%20Ishii | Shihoko Ishii (, born 1950) is a Japanese mathematician and professor at the University of Tokyo. Her research area is algebraic geometry.
Education
Ishii received her bachelor's degree from Tokyo Women's Christian University in 1973 and her master's degree from Waseda University in 1975. She earned her PhD from Tokyo Metropolitan University in 1983.
Research
Ishii's research focuses on singularity theory. She studies arc spaces, a mathematical concept related to jets: arc spaces are varieties encapsulating information about curves on another variety.
Awards and honours
Ishii received the Saruhashi Prize for accomplishments by a Japanese woman researcher in the natural sciences in 1995. As a postdoc, Ishii was inspired by reading a profile of Fumiko Yonezawa, a physicist and former winner of the Saruhashi prize.
Ishii received the Algebra Prize from the Mathematical Society of Japan in 2011.
References
Algebraic geometers
Japanese mathematicians
Women mathematicians
Living people
1950 births |
https://en.wikipedia.org/wiki/Mei-Chu%20Chang | Mei-Chu Chang is a mathematician who works in algebraic geometry and combinatorial number theory.
Education
Chang did her undergraduate studies in Taiwan and received a BS from National Taiwan University. She did her doctoral work at University of California, Berkeley, under the supervision of Robin Hartshorne and was awarded her PhD in 1982. Her dissertation was on Some Results on Stable Rank 2 Vector Bundles and Reflexive Sheaves on P3.
Career and research
After finishing her doctoral studies, Dr. Chang was appointed a Bateman Research Instructor at the California Institute of Technology. She held assistant professor positions at the University of Michigan and University of South Carolina before accepting a position as an associate professor at the University of California, Riverside in 1987. She was promoted to professor at Riverside in 1991. Prof. Chang has held visiting positions in Sweden, Korea, and Italy, at the IHES in Paris, and the IAS in Princeton, as well at several institutions in the US.
In her most cited work, A polynomial bound in Freiman's theorem, Professor Chang established new quantitative bounds for Freiman's inverse theorem.
Honors
Mei-Chu Chang was elected a Fellow of the American Mathematical Society in 2017. The citation reads "For contributions to arithmetic combinatorics, analytic number theory, and algebraic geometry." In 2009 she was chosen to give a plenary address at the 9th International Conference on Finite Fields and Applications, which was held in Dublin, Ireland.
References
External links
Mei-Chu Chang's Author Profile Page on MathSciNet
Mei-Chu Chang's Website at University of California, Riverside
20th-century American mathematicians
21st-century American mathematicians
University of California, Berkeley alumni
University of California, Riverside faculty
Fellows of the American Mathematical Society
Algebraic geometers
American women mathematicians
Living people
Year of birth missing (living people)
20th-century women mathematicians
21st-century women mathematicians
University of Michigan faculty
20th-century American women
21st-century American women |
https://en.wikipedia.org/wiki/Suzanne%20Weekes | Suzanne L. Weekes is the Executive Director of the Society for Industrial and Applied Mathematics. She is also Professor of Mathematical Sciences at Worcester Polytechnic Institute (WPI). She is a co-founder of the Mathematical Sciences Research Institute Undergraduate Program.
Education
Weekes is Caribbean-American, and was born and raised in Trinidad and Tobago. She graduated in 1989 from Indiana University with a major in mathematics and a minor in computer science. She went on to get an MS in applied mathematics in 1990 and a PhD in Mathematics and Scientific Computing in 1995 at the University of Michigan.
Career
Weekes is the co-director of the Preparation for Industrial Careers in Mathematical Sciences, which helps faculty in the U.S. engage their students with Industrial math research. She is a professor of mathematical sciences at Worcester Polytechnic Institute as well as a cofounder of MSRI-UP, a research experience for undergraduates that aims to increase under represented groups in math programs by providing them with research opportunities. In July 2019, she became Interim Associate Dean of Undergraduate Studies at WPI. In December 2019, she was elected to the executive committee of the Association for Women in Mathematics as an at large member.
Awards and recognition
In 2015, Weekes received the Denise Nicoletti Trustees' Award for Service to Community. Weekes was recognized by Mathematically Gifted & Black as a Black History Month 2017 Honoree. She received the 2019 M. Gweneth Humphreys Award for mentorship from the Association for Women in Mathematics. She won the Deborah and Franklin Tepper Haimo Award for Distinguished College or University Teaching of Mathematics from the Mathematical Association of America in 2020. She was honored as the 2022 AWM-MAA Etta Zuber Falconer Lecturer. Weekes was selected a Fellow of the Association for Women in Mathematics in the class of 2024 "for her consistent and outstanding support for broadening the participation of women and girls as well as others that are underrepresented in mathematics; for her award-winning teaching and mentoring; and for her vision and success in co-creating and co-directing innovative programs that have improved and diversified the mathematics community."
References
Trinidad and Tobago scientists
Trinidad and Tobago women scientists
American women mathematicians
Living people
Year of birth missing (living people)
African-American mathematicians
20th-century American mathematicians
21st-century American mathematicians
20th-century women mathematicians
21st-century women mathematicians
University of Michigan alumni
20th-century African-American women
20th-century African-American people
21st-century American women
21st-century African-American women
21st-century African-American people
Fellows of the Association for Women in Mathematics |
https://en.wikipedia.org/wiki/List%20of%20Major%20League%20Baseball%20career%20putouts%20as%20a%20left%20fielder%20leaders | In baseball statistics, a putout (denoted by PO or fly out when appropriate) is given to a defensive player who records an out by tagging a runner with the ball when he is not touching a base, catching a batted or thrown ball and tagging a base to put out a batter or runner (a force out), catching a thrown ball and tagging a base to record an out on an appeal play, catching a third strike (a strikeout), catching a batted ball on the fly (a fly out), or being positioned closest to a runner called out for interference. The left fielder (LF) is one of the three outfielders, the defensive positions in baseball farthest from the batter. Left field is the area of the outfield to the left of a person standing at home plate and facing toward the pitcher's mound. The outfielders have to try to catch long fly balls before they hit the ground or to quickly catch or retrieve and return to the infield any other balls entering the outfield. The left fielder must also be adept at navigating the area of left field where the foul line approaches the corner of the playing field and the walls of the seating areas. Being the outfielder closest to third base, the left fielder generally does not have to throw as far as the other outfielders to throw out runners advancing around the bases, so they often do not have the strongest throwing arm, but their throws need to be accurate. The left fielder normally plays behind the third baseman and shortstop, who play in or near the infield; unlike catchers and most infielders (excepting first basemen), who are virtually exclusively right-handed, left fielders can be either right- or left-handed. In the scoring system used to record defensive plays, the left fielder is assigned the number 7.
The overwhelming majority of putouts recorded by left fielders, almost to exclusivity, result from catching fly balls. However, in extraordinary circumstances, an outfielder may record a putout by receiving a throw to force out or tag out a runner while covering a base if one or more infielders are out of position to retrieve an errant throw, or by tagging a runner stranded between bases in a rundown play; however, even in such circumstances, outfielders will more typically act as a backup to infielders than cover a base themselves. Historically, putout totals for outfielders rose after 1920 with the end of the dead-ball era; the same circumstances which had kept home run totals low, such as overused baseballs and legal adulterations including the spitball, had similarly hindered the type of power hitting which lent itself to long fly balls. But as strikeout totals have risen in baseball in recent decades, the frequency of other defensive outs including flyouts has declined; as a result, putout totals for outfielders have likewise declined. Through the 2022 season, 17 of the top 20 single-season left field putout totals were recorded between 1920 and 1992; none of the top 39 have been recorded since 1997.
Because game accounts and box sco |
https://en.wikipedia.org/wiki/Alauddin%20Khalji%27s%20raid%20on%20Devagiri | {
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"properties": { "marker-symbol": "circle", "title": "Chanderi" },
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"geometry": { "type": "Point", "coordinates": [77.5086754, 21.257584] }
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In 1296, Alauddin Khalji (then known as Ali Gurshasp) raided Devagiri, the capital of the Yadava kingdom in the Deccan region of India. At the time, Alauddin was the governor of Kara in Delhi Sultanate, which was ruled by Jalaluddin Khalji. Alauddin kept his march to Devagiri a secret from Jalaluddin, because he intended to use the wealth obtained from this raid for dethroning the Sultan.
When Alauddin reached Devagiri, the Yadava king Ramachandra retreated to the hill fort, and Alauddin's army thoroughly ransacked the lower city. The defenders were under-prepared for a siege, as the Yadava army was away on an expedition under Ramachandra's son Simhana and the fort of Devagiri had insufficient provisions. Therefore, Ramachandra agreed to a peace treaty, offering Alauddin a large sum of money. However, Simhana soon arrived in the capital and engaged Alauddin in a battle. Alauddin emerged victorious, and forced the Yadavas to agree to a peace treaty. This time, the Yadavas were forced to pay a much larger war indemnity, and had to offer the revenues of the Achalpur province to Alauddin as tribute.
Alauddin returned to Kara after spending some days in Devagiri. He subsequently dethroned Jalaluddin, and sent a second expedition to Devagiri in 1308, which forced Ramachandra to become his vassal.
Background
Alauddin Khalji was a nephew and a son-in-law of Jalaluddin Khalji, the ruler of the Delhi Sultanate. At that time, he was the governor of a province within the Sultanate and lived in the provincial capital Kara. The Yadava kingdom was located to the south of the Sultanate, in the Deccan region. The Paramara and the Chandela kingdoms, which separated the Delhi Sultanate and the Yadava kingdom, had declined in power. Alauddin wanted to usurp the power from Jalaluddin and had decided to plunder other kingdoms to raise money towards this objective. During his 1293 raid on Bhilsa, he had come to know about the immense wealth of the Yadava capital of Devagiri.
Over the next few years, he made preparations to attack Devagiri. He intended to compl |
https://en.wikipedia.org/wiki/Georgia%20Caldwell%20Smith | Georgia Caldwell Smith (1909–1961) was one of the first African-American women to gain a bachelor's degree in mathematics. When she was 51, she earned a Ph.D. in mathematics, one of the earliest by an African-American woman, awarded posthumously in 1961. Smith was the head of the Department of Mathematics at Spelman College.
Early life and education
Smith was born in Atchison, Kansas on 28 August 1909, and attended segregated public schools. She gained her A.B. in 1928, and A.M. in 1929, both in mathematics from the University of Kansas. She gained a master's in mathematics from the University of Chicago in 1929.
Career
Smith was an assistant professor of mathematics of the faculty of Spelman College from 1929 to 1938, and then at Lincoln University (Missouri) until 1943 and Alabama State College. She returned to Spelman in 1945 to take on the position of head of the Department of Mathematics.
Smith undertook further study at the University of Minnesota and University of Georgia, gaining a National Science Foundation fellowship to work on her doctorate. Smith completed her dissertation in 1960 at the University of Pittsburgh, titled Some results on the anti center of a group. Her supervisor was Norman Levine. Her thesis, in Group theory, was approved in January 1961; however, she died of cancer in May. She as awarded the Ph.D. posthumously in 1961.
Professional memberships included the Mathematical Association of America and the American Mathematical Society, including participation in its 1948 meeting in New York. Smith was elected to Phi Beta Kappa and Pi Mu Epsilon.
Personal life and death
Smith was married to Dr. Barnett Frissell Smith, the head of Spelman's department of biology. They had a son, Barnett F. Smith Jr. She died on 6 May 1961, due to Cancer before her PhD was conferred posthumously in June.
References
African-American mathematicians
Spelman College faculty
1909 births
1961 deaths
Mathematicians from Kansas
People from Atchison, Kansas
University of Chicago alumni
University of Kansas alumni
University of Pittsburgh alumni
20th-century American mathematicians
Lincoln University (Missouri) faculty
Alabama State University faculty
Deaths from cancer in Pennsylvania
American women mathematicians
20th-century African-American women
20th-century African-American scientists |
https://en.wikipedia.org/wiki/Kathryn%20Hess | Kathryn Pamela Hess (born 1967) is an American mathematician who has served as professor of mathematics at École Polytechnique Fédérale de Lausanne (EPFL) since 1999. She is known for her work on homotopy theory, category theory, and algebraic topology, both pure and applied. In particular, she applies the methods of algebraic topology to the study of neurology, cancer biology, and materials science. She is a fellow of the American Mathematical Society.
Life
Kathryn Hess was born 21 September 1967 in Bryn Mawr, Pennsylvania. She began to accelerate in mathematics in 1979, thanks to the Mathematical Talent Development Project (MTDP) set up in Eau Claire, Wisconsin, by her parents, through the Association for High Potential Children, which they also founded. Both programs are currently defunct. Hess earned a BSc with honors in mathematics from the University of Wisconsin–Madison in 1985. She received her doctorate in mathematics from the Massachusetts Institute of Technology in 1989 under the direction of . Her dissertation was entitled A Proof of Ganea's Conjecture for Rational Spaces.
Work
Hess has worked and written extensively on topics in algebraic topology including homotopy theory, model categories and algebraic K-theory. She has also used the methods of algebraic topology and category theory to investigate homotopical generalizations of descent theory and Hopf–Galois extensions. In particular, she has studied generalizations of these structures for ring spectra and differential graded algebras.
She has more recently used algebraic topology to understand structures in neurology and materials science.
As of March 2022, she has been the principal academic advisor for 14 mathematics PhDs at EPFL, including 4 women.
Awards and honors
In addition to her strong publication record, Hess has been widely recognized for her pedagogical abilities. She received the Agepoly prize for best teacher in the Basic Sciences Faculty in 2005, the Credit Suisse prize for best EPFL teacher in 2012, and the "Polysphere d'Or" Agepoly prize for best teacher at EPFL in 2013.
She was named an individual member of the Swiss Academy of Engineering Sciences in 2016 and a fellow of the American Mathematical Society for "contributions to homotopy theory, applications of topology to the analysis of biological data, and service to the mathematical community" in 2017. In 2017, she received an award as a distinguished speaker of the European Mathematical Society. She delivered one of the public lectures during the Eighth European Congress of Mathematics on 21 June 2021. Hess was named a fellow of the Association for Women in Mathematics in the class of 2024 "for her support of women in mathematics via innovative and impactful programs, including her role in founding and sustaining the Women in Topology program; for her exceptional mentoring; and for her commitment to gender diversity throughout her many leadership roles in the mathematics profession."
Selected publi |
https://en.wikipedia.org/wiki/List%20of%20Major%20League%20Baseball%20career%20putouts%20as%20a%20center%20fielder%20leaders | In baseball statistics, a putout (denoted by PO or fly out when appropriate) is given to a defensive player who records an out by tagging a runner with the ball when he is not touching a base, catching a batted or thrown ball and tagging a base to put out a batter or runner (a force out), catching a thrown ball and tagging a base to record an out on an appeal play, catching a third strike (a strikeout), catching a batted ball on the fly (a fly out), or being positioned closest to a runner called out for interference. The center fielder (CF) is one of the three outfielders, the defensive positions in baseball farthest from the batter. Center field is the area of the outfield directly in front of a person standing at home plate and facing beyond the pitcher's mound. The outfielders' duty is to try to catch long fly balls before they hit the ground or to quickly catch or retrieve and return to the infield any other balls entering the outfield. Generally having the most territory to cover, the center fielder is usually the fastest of the three outfielders, although this can also depend on the relative strength of their throwing arms and the configuration of their home field, due to the deepest part of center field being the farthest point from the infield and home plate. The center fielder normally plays behind the shortstop and second baseman, who play in or near the infield; unlike catchers and most infielders (excepting first basemen), who are virtually exclusively right-handed, center fielders can be either right- or left-handed. In the scoring system used to record defensive plays, the center fielder is assigned the number 8.
The overwhelming majority of putouts recorded by center fielders, almost to exclusivity, result from catching fly balls. However, in extraordinary circumstances, an outfielder may record a putout by receiving a throw to force out or tag out a runner while covering a base if one or more infielders are out of position to retrieve an errant throw, or by tagging a runner stranded between bases in a rundown play; however, even in such circumstances, outfielders will more typically act as a backup to infielders than cover a base themselves. Historically, putout totals for outfielders rose after 1920 with the end of the dead-ball era; the same circumstances which had kept home run totals low, such as overused baseballs and legal adulterations including the spitball, had similarly hindered the type of power hitting which lent itself to long fly balls. But as strikeout totals have risen in baseball in recent decades, the frequency of other defensive outs including flyouts has declined; as a result, putout totals for outfielders have likewise declined. Through the 2022 season, 27 of the top 30 single-season center field putout totals were recorded between 1924 and 1986; only five of the top 112 have been recorded since 2003.
Because game accounts and box scores often did not distinguish between the outfield positions, there has bee |
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