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Reduction of Order for variable coefficients?
January 9th 2010, 02:03 PM #1
Dec 2008
Reduction of Order for variable coefficients?
4x^2 y′′ + 8 x y′ − 3 y = 0 , x > 0
y(4) = 8, y′ (4) = 0
So far I've only seen characteristic solutions being solved via reduction of order but I'm not so sure about equatio... | {"url":"http://mathhelpforum.com/differential-equations/123050-reduction-order-variable-coefficients.html","timestamp":"2014-04-18T06:18:46Z","content_type":null,"content_length":"39411","record_id":"<urn:uuid:6f8b90e0-b259-4305-968e-cf04006a3fab>","cc-path":"CC-MAIN-2014-15/segments/1397609535775.35/warc/CC-MAIN-20140... |
Brevet US5644206 - Control unit for induction motor
In a preferred embodiment of the invention, a control unit for an induction motor is configured as shown in FIG. 3 The parts identical to those shown in FIG. 1 will not be repeatedly described here.
A 3-phase-to-2-phase converter 9 calculates a detected excitation cur... | {"url":"http://www.google.fr/patents/US5644206","timestamp":"2014-04-16T13:06:34Z","content_type":null,"content_length":"91221","record_id":"<urn:uuid:cf885d0b-bdc0-48a1-bd9a-14ef35367532>","cc-path":"CC-MAIN-2014-15/segments/1398223201753.19/warc/CC-MAIN-20140423032001-00503-ip-10-147-4-33.ec2.internal.warc.gz"} |
Prove this Theorem and Corollary
March 11th 2010, 02:11 PM
Prove this Theorem and Corollary
1. Use this theorem to prove the corollary given below.
Theorem: There are two nonzero solutions y1 and y2 to the differential equation
y''+ p(t)y' + q(t) = 0
such that one of the two functions is not a constant ... | {"url":"http://mathhelpforum.com/differential-equations/133358-prove-theorem-corollary-print.html","timestamp":"2014-04-19T13:20:08Z","content_type":null,"content_length":"6431","record_id":"<urn:uuid:020c8abe-1b22-4989-9053-bac520fc294d>","cc-path":"CC-MAIN-2014-15/segments/1397609537186.46/warc/CC-MAIN-20140416005217... |
Jules Tannery on Teaching Elementary Geometry
To mathematicians, Jules Tannery needs no introduction. The point he makes here is argued in more detail (and perhaps more forcefully) three decades later by Tatjana Ehrenfest-Afanassjewa. It is, as
another French thinker (Gonseth) pointed out, that the beginning becomes th... | {"url":"http://www.pims.math.ca/~hoek/teageo/Tannery/","timestamp":"2014-04-18T03:10:34Z","content_type":null,"content_length":"1768","record_id":"<urn:uuid:dca22b16-f3d9-4e1b-ba2f-c24e712e2649>","cc-path":"CC-MAIN-2014-15/segments/1398223207046.13/warc/CC-MAIN-20140423032007-00632-ip-10-147-4-33.ec2.internal.warc.gz"} |
MATH 117 Calculus I
Limits and continuity of functions; the concept of derivative; calculating derivatives; applications of derivatives such as optimization and related rates; integration through the Fundamental
Theorem. Students with credit for MATH 117 may not enroll in MATH 105, 116, or 125. (Prerequisite: MATH 116 ... | {"url":"https://catalog.bellarmine.edu/2011-2012/course/math-117-calculus-i","timestamp":"2014-04-17T21:32:51Z","content_type":null,"content_length":"7169","record_id":"<urn:uuid:96329b8a-8871-496d-8cbb-09913b333974>","cc-path":"CC-MAIN-2014-15/segments/1397609532128.44/warc/CC-MAIN-20140416005212-00249-ip-10-147-4-33.... |
Solution to puzzle 37: Five marbles
Consider two adjacent marbles, of radii a < b. We will show that b/a is a constant, whose value is dependent only upon the slope of the funnel wall.
The marbles are in contact with each other, and therefore the vertical distance between their centers is b + a.
The marbles are also in... | {"url":"http://www.qbyte.org/puzzles/p037s.html","timestamp":"2014-04-21T02:00:33Z","content_type":null,"content_length":"5256","record_id":"<urn:uuid:b681cea1-12b0-4d7c-a8af-d2dfb42ce2f7>","cc-path":"CC-MAIN-2014-15/segments/1397609539447.23/warc/CC-MAIN-20140416005219-00652-ip-10-147-4-33.ec2.internal.warc.gz"} |
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Topic: Is there any webpage or math program that can write fracitons,
numbers into bijective enumeration?
Repl... | {"url":"http://mathforum.org/kb/message.jspa?messageID=8855920","timestamp":"2014-04-21T08:15:59Z","content_type":null,"content_length":"101211","record_id":"<urn:uuid:e6a5d26e-f78d-442b-8541-54076785c75b>","cc-path":"CC-MAIN-2014-15/segments/1397609539665.16/warc/CC-MAIN-20140416005219-00357-ip-10-147-4-33.ec2.interna... |
Pick Random Numbers
Re: Pick Random Numbers
Is it greater than the probability to be > or equal to 0.3?
I am not understanding you here, the P(≥.3) = .49
Did you check your post about the towns?
In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to g... | {"url":"http://www.mathisfunforum.com/viewtopic.php?id=19825","timestamp":"2014-04-19T22:29:53Z","content_type":null,"content_length":"12367","record_id":"<urn:uuid:9b32f5da-66df-4b60-ae96-f5b1e56c95ba>","cc-path":"CC-MAIN-2014-15/segments/1397609537754.12/warc/CC-MAIN-20140416005217-00292-ip-10-147-4-33.ec2.internal.w... |
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alg1 help please!!!! Based on the graph of y = x^2 − 2x − 3, w... | {"url":"http://openstudy.com/updates/51226760e4b03d9dd0c59bbe","timestamp":"2014-04-18T16:33:54Z","content_type":null,"content_length":"45195","record_id":"<urn:uuid:e26ddaef-2f62-4f69-a499-011088da4320>","cc-path":"CC-MAIN-2014-15/segments/1397609533957.14/warc/CC-MAIN-20140416005213-00005-ip-10-147-4-33.ec2.internal.... |
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[ODE] discontinuities/accuracy of integration
Marc Toussaint mtoussai at inf.ed.ac.uk
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Hi there!
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5 Countable v. Uncountable Problems (Please help)
November 5th 2007, 08:57 PM #1
Oct 2007
5 Countable v. Uncountable Problems (Please help)
Please help me with these countable, uncountable problems I am having trouble with.
1. Determine whether each of these sets is countable or uncountable. For those that ... | {"url":"http://mathhelpforum.com/discrete-math/22095-5-countable-v-uncountable-problems-please-help.html","timestamp":"2014-04-19T05:18:01Z","content_type":null,"content_length":"47986","record_id":"<urn:uuid:11931658-353c-4cce-b565-8eccc16a256a>","cc-path":"CC-MAIN-2014-15/segments/1397609535775.35/warc/CC-MAIN-201404... |
Items tagged with equation
I have a problem to make a figure, commands are below:
S1 = sqrt(beta^2-e1), S2 = sqrt(beta^2-e2);
e1 = 4, e2 = -19-.53*I;
subs(`%%`, %, k = 2*Pi/(0.633e-6), `%%%`);
I want to plot the relation between d and beta(real part named betar and imaginary part betai),but meet some trouble.
I got som... | {"url":"http://www.mapleprimes.com/tags/equation?page=4","timestamp":"2014-04-20T15:54:16Z","content_type":null,"content_length":"95159","record_id":"<urn:uuid:51b5fe7b-24ee-40c2-afaa-47040fd22659>","cc-path":"CC-MAIN-2014-15/segments/1398223206672.15/warc/CC-MAIN-20140423032006-00198-ip-10-147-4-33.ec2.internal.warc.g... |
Items tagged with equation
I have a problem to make a figure, commands are below:
S1 = sqrt(beta^2-e1), S2 = sqrt(beta^2-e2);
e1 = 4, e2 = -19-.53*I;
subs(`%%`, %, k = 2*Pi/(0.633e-6), `%%%`);
I want to plot the relation between d and beta(real part named betar and imaginary part betai),but meet some trouble.
I got som... | {"url":"http://www.mapleprimes.com/tags/equation?page=4","timestamp":"2014-04-20T15:54:16Z","content_type":null,"content_length":"95159","record_id":"<urn:uuid:51b5fe7b-24ee-40c2-afaa-47040fd22659>","cc-path":"CC-MAIN-2014-15/segments/1397609538824.34/warc/CC-MAIN-20140416005218-00198-ip-10-147-4-33.ec2.internal.warc.g... |
Problem with two functions in single cout
Problem with two functions in single cout
using namespace std;
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GNU Scientific Library 1.7 released
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GNU Scientific Library 1.7 released
From: Brian Gough
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...Explaining math concepts to students on a one to one basis is one of my favorite things to do. I can help with any level of math through Pre Calculus.I have a great deal of experience working
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What's the syntax of "IF EXISTS" in Oracle?
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Hi, All:
I am currently migrating a SQL Server stored procedure to Oracle stored procedure:
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up vote 2 down vote favorite
N.Hitchen in his paper about geometry of three forms wrote that "for a Real vector space $V$ of dimension six, the group $GL(6,V)$ has an open orbit and he referenced it to a thesis which was written
in 1907 , how can we prove this fact, is there a... | {"url":"http://mathoverflow.net/questions/118801/why-the-group-gl6-v-has-an-open-orbit?answertab=active","timestamp":"2014-04-16T22:38:07Z","content_type":null,"content_length":"65948","record_id":"<urn:uuid:d863bb24-acbc-4453-93df-2472dc4eabb7>","cc-path":"CC-MAIN-2014-15/segments/1397609525991.2/warc/CC-MAIN-20140416... |
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Finding area of a polygon with 8 vertices
February 3rd 2009, 07:45 PM #1
Jan 2009
Finding area of a polygon with 8 vertices
I have 8 vertices with x,y,z coordinates for all the 8 vertices. Can anybofy suggest a good formula for finding the area of polygon.
see The area of an octagon
Area of an octagon
... | {"url":"http://mathhelpforum.com/geometry/71671-finding-area-polygon-8-vertices.html","timestamp":"2014-04-18T22:06:56Z","content_type":null,"content_length":"33312","record_id":"<urn:uuid:eb43b43f-58d9-4788-b831-4d024246879a>","cc-path":"CC-MAIN-2014-15/segments/1397609535095.9/warc/CC-MAIN-20140416005215-00187-ip-10-... |
the first resource for mathematics
Pointwise ergodic theorems for arithmetic sets. With an appendix on return-time sequences, jointly with Harry Furstenberg, Yitzhak Katznelson and Donald S. Ornstein.
(English) Zbl 0705.28008
Let $\left({\Omega },ℬ,\mu \right)$ be a probability space, $T$ a measure- preserving automorp... | {"url":"http://zbmath.org/?q=an:0705.28008","timestamp":"2014-04-18T13:16:02Z","content_type":null,"content_length":"27553","record_id":"<urn:uuid:ccd2d6ee-f53d-4fd2-91ae-e97eecabdb26>","cc-path":"CC-MAIN-2014-15/segments/1398223206147.1/warc/CC-MAIN-20140423032006-00410-ip-10-147-4-33.ec2.internal.warc.gz"} |
parallel infinite wires - magnetic field
1. The problem statement, all variables and given/known data
four parallel infinite wires are arranged as shown in the figure: (see attachment)
a) calculate the value of the magnetic field produced along the central axis of the configuration (magnitude and direction)
b) a fifth ... | {"url":"http://www.physicsforums.com/showthread.php?t=241521","timestamp":"2014-04-20T21:27:37Z","content_type":null,"content_length":"36521","record_id":"<urn:uuid:64009b53-4524-4d97-9c8a-0831af182dc6>","cc-path":"CC-MAIN-2014-15/segments/1397609539230.18/warc/CC-MAIN-20140416005219-00649-ip-10-147-4-33.ec2.internal.w... |
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Periodic Table of the Elements - Oxidation Numbers
This periodic table contains the oxidation numbers of the elements. Bold numbers represent the more common oxidation states. Values in italics represent theoretical or unconfirmed oxidation numbers.
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[SOLVED] Eigenvalues and Eigenvectors
October 23rd 2009, 06:04 AM #1
Oct 2009
[SOLVED] Eigenvalues and Eigenvectors
I have a NxN covariance matrix with 1's in the diagonals and x's everywhere else.
I know the eigenvalue's are [(N-1)(x+1)], (1-x), (1-x),.......
I know the eigenvector for the largest eige... | {"url":"http://mathhelpforum.com/advanced-statistics/109921-solved-eigenvalues-eigenvectors.html","timestamp":"2014-04-17T14:25:40Z","content_type":null,"content_length":"29055","record_id":"<urn:uuid:e875393f-a765-4812-a83b-23279477975f>","cc-path":"CC-MAIN-2014-15/segments/1397609530131.27/warc/CC-MAIN-20140416005210... |
Decimal digits of pi
David Gileff gileff at kits.sfu.ca
Wed Mar 31 14:21:37 EST 1993
Oliver at ugr.es (JL Oliver) writes:
>Dear Netters,
>Please, could someone point me to a source (ftp accesible, if possible) for
>an algorithm generating the series of decimal digits of the number pi?
>I need this random series as a r... | {"url":"http://www.bio.net/bionet/mm/bio-soft/1993-March/004369.html","timestamp":"2014-04-17T11:14:07Z","content_type":null,"content_length":"2981","record_id":"<urn:uuid:ab649322-1b08-4d42-8ca2-6084fb5450b9>","cc-path":"CC-MAIN-2014-15/segments/1397609536300.49/warc/CC-MAIN-20140416005216-00603-ip-10-147-4-33.ec2.int... |
5. Miscellaneous Services
5. Miscellaneous Services
The modules described in this chapter provide miscellaneous services that are available in all Python versions. Here's an overview:
pydoc Documentation generator and online help system.
doctest A framework for verifying examples in docstrings.
unittest ... | {"url":"http://www.wingware.com/psupport/python-manual/2.2/lib/misc.html","timestamp":"2014-04-17T04:06:44Z","content_type":null,"content_length":"7345","record_id":"<urn:uuid:cc24b9f5-c257-48a6-9b3e-67df1d77d0ca>","cc-path":"CC-MAIN-2014-15/segments/1397609526252.40/warc/CC-MAIN-20140416005206-00526-ip-10-147-4-33.ec2... |
Symmetric Polynomials and Symmetric Mean Inequalities
We prove generalized arithmetic-geometric mean inequalities for quasi-means arising from symmetric polynomials. The inequalities are satisfied by all positive, homogeneous symmetric polynomials, as
well as a certain family of non-homogeneous polynomials; this family... | {"url":"http://www.combinatorics.org/ojs/index.php/eljc/article/view/v20i3p34/0","timestamp":"2014-04-21T15:37:23Z","content_type":null,"content_length":"15774","record_id":"<urn:uuid:48a0798d-f7e2-44c4-b347-7a6b01e0f3d4>","cc-path":"CC-MAIN-2014-15/segments/1397609540626.47/warc/CC-MAIN-20140416005220-00540-ip-10-147-... |
Annotated bibliography of papers by Christopher Meek
Annotated Bibliography of Papers by Christopher Meek
Christopher Meek
Microsoft Research
Redmond, WA 98052, USA
March, 2008
Year: 2008, 2007, 2006, 2005, 2004, 2003, 2002, 2001, 2000, 1999, 1998, 1997, 1996, 1995, 1994
Tied Boltzmann Machines for Cold Start Recommend... | {"url":"http://research.microsoft.com/en-us/um/people/meek/mypapers.htm","timestamp":"2014-04-21T01:17:03Z","content_type":null,"content_length":"87222","record_id":"<urn:uuid:c734a433-04e1-4ce2-8dac-bc66204d2668>","cc-path":"CC-MAIN-2014-15/segments/1397609539337.22/warc/CC-MAIN-20140416005219-00145-ip-10-147-4-33.ec2... |
Impedance equation
October 9th 2012, 10:03 AM
Impedance equation
Hi guys,
i need some help please with the following equation, I need to make c the subject of z=sqrt(r^2 + (xl - xc)^2).
My first step was remove the sqrt to become z^2=r^2 + (xl - xc)^2
Then expand the brackets so z^2=r^2 + (xl - Xc)(Xl -... | {"url":"http://mathhelpforum.com/algebra/204950-impedance-equation-print.html","timestamp":"2014-04-18T23:38:31Z","content_type":null,"content_length":"7968","record_id":"<urn:uuid:583533e9-75bd-4a63-82d9-edb82a2c9528>","cc-path":"CC-MAIN-2014-15/segments/1397609535535.6/warc/CC-MAIN-20140416005215-00591-ip-10-147-4-33... |
Math Forum
This week was very busy! I accomplished numerous tasks, such as working with Dr. Math, creating video scenarios for the different PoWs, completing this week’s Problems of the Week in Math
Fundamentals, Algebra, and Trig & Calc, posted my “noticings” and “wonderings” on the PoW Blog, and navigated through the... | {"url":"http://mathforum.org/blogs/casey/2013/04/12/primary-pow-packets/","timestamp":"2014-04-16T10:45:08Z","content_type":null,"content_length":"19096","record_id":"<urn:uuid:c513205a-ccd6-4f18-944b-beab3bee75e2>","cc-path":"CC-MAIN-2014-15/segments/1397609523265.25/warc/CC-MAIN-20140416005203-00385-ip-10-147-4-33.ec... |
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Find the time, t, in seconds it takes for an object to fall fr... | {"url":"http://openstudy.com/updates/506453f9e4b0da5168be185b","timestamp":"2014-04-18T10:37:54Z","content_type":null,"content_length":"34834","record_id":"<urn:uuid:e389ac03-c3ed-4218-920a-138f796e2848>","cc-path":"CC-MAIN-2014-15/segments/1397609533308.11/warc/CC-MAIN-20140416005213-00420-ip-10-147-4-33.ec2.internal.... |
How do they derive from equation A to B?
September 22nd 2012, 07:14 AM #1
How do they derive from equation A to B?
Re: How do they derive from equation A to B?
Those two values are only equal for very specific values of z: those making sin(z) = 0, and those (exactly 3 of them) making (-3j)(z)(z^2+1) = 2z + (3-j).
R... | {"url":"http://mathhelpforum.com/math-topics/203858-how-do-they-derive-equation-b.html","timestamp":"2014-04-19T09:04:11Z","content_type":null,"content_length":"33845","record_id":"<urn:uuid:c5c85063-c978-4e1b-a9d4-495b4634fbe0>","cc-path":"CC-MAIN-2014-15/segments/1397609536300.49/warc/CC-MAIN-20140416005216-00542-ip-... |
MDX. More than TopSum().
MDX query. Industrial version.
Article covers: MDX query, recursive formula, ratio, TopSum(), Filter(), Order(), Sum(), Head(), Rank(), IIF().
TopSum(set, threshold, sorting and thresholding expression) Returns: set
TopSum() selects the top tuples of a set whose sum meets a threshold, i.e. retu... | {"url":"http://www.codeproject.com/Articles/44007/MDX-More-than-TopSum?fid=1552195&df=90&mpp=10&noise=1&prof=True&sort=Position&view=Expanded&spc=None","timestamp":"2014-04-20T12:16:13Z","content_type":null,"content_length":"73970","record_id":"<urn:uuid:10f84060-94c5-4b7b-a594-6d03cfe4d295>","cc-path":"CC-MAIN-2014-15... |
Differential equations
September 14th 2008, 05:04 PM
Differential equations
Use the definition of the derivative to find f' (x).
f (x)= $\frac {1}{\sqrt(x)}$
The answer I got is $\frac{-\sqrt(x)}{2x}$
Can someone tell me if this is right? If it isn't, I will post my work to see where I went wrong.
Septe... | {"url":"http://mathhelpforum.com/differential-equations/49072-differential-equations-print.html","timestamp":"2014-04-20T08:03:10Z","content_type":null,"content_length":"12699","record_id":"<urn:uuid:66226e04-ea37-441c-9ae0-4ce0a064c259>","cc-path":"CC-MAIN-2014-15/segments/1397609538022.19/warc/CC-MAIN-20140416005218-... |
Local Apparent Sidereal Time
Compute Local Apparent Sidereal Time
Sidereal time is the hour angle of the vernal equinox, the ascending node of the ecliptic on the celestial equator. The daily motion of this point provides a measure of the ... | {"url":"http://tycho.usno.navy.mil/sidereal.html","timestamp":"2014-04-23T08:04:55Z","content_type":null,"content_length":"2199","record_id":"<urn:uuid:c41bb02f-394f-4a8e-9e51-2e158ba26898>","cc-path":"CC-MAIN-2014-15/segments/1398223201753.19/warc/CC-MAIN-20140423032001-00434-ip-10-147-4-33.ec2.internal.warc.gz"} |
C, big numbers and storing them
C, big numbers and storing them
lets say i had a calculation, and the answer was 128 bit number; and I try and store this into an int, does the overflow occur when the answer was calculated, or does the answer overflow once I
attempt to store into an int?
the reason i ask is,... | {"url":"http://cboard.cprogramming.com/c-programming/97116-c-big-numbers-storing-them-printable-thread.html","timestamp":"2014-04-17T12:40:54Z","content_type":null,"content_length":"23071","record_id":"<urn:uuid:2ec0dc01-d70a-4ee8-9ac2-be96e9aa1f53>","cc-path":"CC-MAIN-2014-15/segments/1397609530131.27/warc/CC-MAIN-201... |
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Topic: THE FUNDAMENTAL EQUATION OF SPECIAL RELATIVITY
Replies: 4 Last Post: Dec 6, 2013 2:16 PM
Message... | {"url":"http://mathforum.org/kb/thread.jspa?threadID=2609554&messageID=9337185","timestamp":"2014-04-19T00:25:19Z","content_type":null,"content_length":"23006","record_id":"<urn:uuid:8dbb8065-1081-4f26-a20b-14d21aff577a>","cc-path":"CC-MAIN-2014-15/segments/1397609535535.6/warc/CC-MAIN-20140416005215-00158-ip-10-147-4-... |
Accuracy of adaptive discontinuous Galerkin simulations
Seminar Room 1, Newton Institute
Adaptive mesh refinement generally serves to increase computational efficiency without compromising the accuracy of the numerical solution significantly. However it is an open question in which
regions the spatial resolution can ac... | {"url":"http://www.newton.ac.uk/programmes/AMM/seminars/2012092514251.html","timestamp":"2014-04-19T20:09:19Z","content_type":null,"content_length":"6931","record_id":"<urn:uuid:06439b4d-b614-484e-9e43-f26e244123c4>","cc-path":"CC-MAIN-2014-15/segments/1397609537376.43/warc/CC-MAIN-20140416005217-00088-ip-10-147-4-33.e... |
March 2014 Colloquium, Department of Mathematical Sciences, DePaul University, Chicago, Illinois
Vector Products and Division Algebras
March 2014 Algebra and Combinatorics Seminar, Department of Mathematical Sciences, DePaul University, Chicago, Illinois
The 0-P... | {"url":"http://www.southalabama.edu/mathstat/personal_pages/feldvoss/talks.html","timestamp":"2014-04-18T19:03:47Z","content_type":null,"content_length":"41053","record_id":"<urn:uuid:4d4a01b3-6cc8-4e27-9a94-00139662f288>","cc-path":"CC-MAIN-2014-15/segments/1398223206120.9/warc/CC-MAIN-20140423032006-00431-ip-10-147-4... |
Inference to the Best Explanation, Bayesianism, and Feminist Bank Tellers
David Chart
Department of History and Philosophy of Science
University of Cambridge
Free School Lane
CB2 3RH
Inference to the Best Explanation and Bayesianism have both been proposed as descriptions of the way that people make inferences. This pa... | {"url":"http://philsci-archive.pitt.edu/322/1/ibefbt.html","timestamp":"2014-04-16T18:57:49Z","content_type":null,"content_length":"15451","record_id":"<urn:uuid:c0c37f05-f8aa-4ac8-bc0b-3456520c4f7e>","cc-path":"CC-MAIN-2014-15/segments/1397609524644.38/warc/CC-MAIN-20140416005204-00145-ip-10-147-4-33.ec2.internal.warc... |
Find The Thevenin Equivalent Of The Following Circuit ... | Chegg.com
Find the Thevenin equivalent of the following circuit at terminals a-b given that Is(t) = 2 cos ( 6 t ) A and Vs(t) = 2 cos ( 6 t + 90°) V. You can use previous results. Give the value of VT as a
complex number (phasor) and ZT as a complex number (im... | {"url":"http://www.chegg.com/homework-help/questions-and-answers/find-thevenin-equivalent-following-circuit-terminals-b-given-t-2-cos-6-t-vs-t-2-cos-6-t-90-q1050589","timestamp":"2014-04-18T00:26:17Z","content_type":null,"content_length":"21490","record_id":"<urn:uuid:beb0a12a-01c1-4fac-831f-600d4d2ffc7e>","cc-path":"C... |
Toby Walsh
Uncertainty arises in preference aggregation in several ways. There may, for example, be uncertainty in the votes or the voting rule. Such uncertainty can introduce computational complexity in
determining which candidate or candidates can or must win the election. In this paper, we survey recent work in this... | {"url":"http://www.aaai.org/Library/AAAI/2007/aaai07-001.php","timestamp":"2014-04-18T23:22:17Z","content_type":null,"content_length":"1240","record_id":"<urn:uuid:2b7bd300-3d24-450c-979f-221fa53dda72>","cc-path":"CC-MAIN-2014-15/segments/1398223201753.19/warc/CC-MAIN-20140423032001-00261-ip-10-147-4-33.ec2.internal.wa... |
User Changyu Guo
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I am a post-doctoral researcher at University of Jyväskylä. My research interest is geometric function theory and analysis on metri... | {"url":"http://mathoverflow.net/users/26608/changyu-guo?tab=activity","timestamp":"2014-04-17T01:20:43Z","content_type":null,"content_length":"46459","record_id":"<urn:uuid:535f2bbb-07ab-4986-8fc3-0acbd331d054>","cc-path":"CC-MAIN-2014-15/segments/1397609526102.3/warc/CC-MAIN-20140416005206-00154-ip-10-147-4-33.ec2.int... |
Lawndale, CA Algebra 2 Tutor
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Hello there, my name is Jamie!I have a Bachelor's in Molecular Biology, over 10 years of tutoring, teaching, and home-schooling experience in Los Angeles, CA, and have helped over a hundred
students get into their college of choice. My philosophy is a... | {"url":"http://www.purplemath.com/Lawndale_CA_Algebra_2_tutors.php","timestamp":"2014-04-17T01:24:36Z","content_type":null,"content_length":"24268","record_id":"<urn:uuid:c9e4d718-e8d6-4680-a284-d58da2e0dc58>","cc-path":"CC-MAIN-2014-15/segments/1397609526102.3/warc/CC-MAIN-20140416005206-00407-ip-10-147-4-33.ec2.inter... |
Deus Ex Macchiato
There is another way of understanding yesterday’s anomalous result that banks with a Basel III ratio greater than 7% did not fail, yet it seemed from some rather rough maths as though some of them
should have done. It is simply that more capital protects a bank for longer, and thus you don’t need enou... | {"url":"http://blog.rivast.com/?cat=36","timestamp":"2014-04-20T15:51:58Z","content_type":null,"content_length":"57882","record_id":"<urn:uuid:2c205877-c9c7-4cce-84cc-7a95c29825c8>","cc-path":"CC-MAIN-2014-15/segments/1397609538824.34/warc/CC-MAIN-20140416005218-00387-ip-10-147-4-33.ec2.internal.warc.gz"} |
From Encyclopedia of Mathematics
The graph of the function $y=\sin x$ (see Fig.). The sinusoid is a continuous curve with period $T=2\pi$. It intersects the $x$-axis at the points $(k\pi, 0)$. These are also points of inflection,
meeting the $x$-axis at an angle of $\pm\pi/4$. The extrema are at the points $((k+1/2)\pi... | {"url":"http://www.encyclopediaofmath.org/index.php/Sinusoid","timestamp":"2014-04-17T04:04:38Z","content_type":null,"content_length":"19809","record_id":"<urn:uuid:e8b65165-39f1-4564-b918-9665e4a8ceb1>","cc-path":"CC-MAIN-2014-15/segments/1398223211700.16/warc/CC-MAIN-20140423032011-00601-ip-10-147-4-33.ec2.internal.w... |
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AI: Solution Set 1
Problem 1.A
empty -----> S=W -----> S=W,T=X -----> S=W,T=X,U=Y -----> fail
| |
| |--> S=W,T=Y -----> S=W,T=Y,U=X -----> fail
|--> S=X -----> S=X,T=W -----> S=X,T=W,U=Y -----> fail
| |
| |--> S=X,T=Y -----> S=X,T=Y,U=W -----> ... | {"url":"http://cs.nyu.edu/courses/spring04/G22.2560-001/sol1.html","timestamp":"2014-04-20T06:18:16Z","content_type":null,"content_length":"3451","record_id":"<urn:uuid:971b0088-9241-4da7-bc2d-0e0bd00c7d77>","cc-path":"CC-MAIN-2014-15/segments/1398223203841.5/warc/CC-MAIN-20140423032003-00046-ip-10-147-4-33.ec2.interna... |
Handing out distinct presents
February 25th 2013, 02:16 PM #1
Feb 2011
Handing out distinct presents
The problem is written as follows:
Each of 10 employees brings one (distinct) present to an office party. Each present is given to a randomly selected employee by Santa (an employee can get more than 1 pres... | {"url":"http://mathhelpforum.com/statistics/213810-handing-out-distinct-presents.html","timestamp":"2014-04-21T16:19:01Z","content_type":null,"content_length":"31344","record_id":"<urn:uuid:5175c280-d822-417d-8f7a-3de0c33633b0>","cc-path":"CC-MAIN-2014-15/segments/1397609540626.47/warc/CC-MAIN-20140416005220-00044-ip-1... |
Adjacent Primes
Date: 11/26/2001 at 18:22:10
From: Will
Subject: Adjacent Primes
What are adjacent primes?
Thanks a bunch,
Will Little
Date: 11/27/2001 at 17:34:46
From: Doctor Achilles
Subject: Re: Adjacent Primes
Hi Will,
Thanks for writing to Dr. Math.
Adjacent primes are two consecutive odd integers, both of which ... | {"url":"http://mathforum.org/library/drmath/view/57211.html","timestamp":"2014-04-17T16:52:10Z","content_type":null,"content_length":"5683","record_id":"<urn:uuid:7bc38d7b-40a4-455f-ab98-84e0a8ae165d>","cc-path":"CC-MAIN-2014-15/segments/1398223206647.11/warc/CC-MAIN-20140423032006-00015-ip-10-147-4-33.ec2.internal.war... |
Two problems, help please
February 10th 2009, 11:04 AM #1
Junior Member
Oct 2007
Two problems, help please
I have two problems that I can't figure out.
1.) if f(x) = 3x^2 - x +c and f(3) = 18, What is the value of C?
2.) if f(x) = 2x+5/X-A and f(0) = -1, what is the Value of A?
Thanks in advance!!!
... | {"url":"http://mathhelpforum.com/algebra/72873-two-problems-help-please.html","timestamp":"2014-04-17T06:01:32Z","content_type":null,"content_length":"33373","record_id":"<urn:uuid:de770ac9-218d-4950-bfa1-182744ab8cd7>","cc-path":"CC-MAIN-2014-15/segments/1397609526252.40/warc/CC-MAIN-20140416005206-00611-ip-10-147-4-3... |
New York Calculus Tutor
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Dupont, WA ACT Tutor
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...My first time taking the MCAT, I scored in 99th percentile, and subsequently I've consistently scored perfect on repeat exams. Tutoring is my full-time gig. I mainly teach for a company that
requires me to have perfect scores on the MCAT, GRE, GMAT, and LSAT - an ... | {"url":"http://www.purplemath.com/Dupont_WA_ACT_tutors.php","timestamp":"2014-04-17T00:49:00Z","content_type":null,"content_length":"23546","record_id":"<urn:uuid:470c07e3-7776-431e-8ca2-65d79b9e1daa>","cc-path":"CC-MAIN-2014-15/segments/1398223205137.4/warc/CC-MAIN-20140423032005-00224-ip-10-147-4-33.ec2.internal.warc... |
trigonometry problem (hard)
Re: trigonometry problem (hard)
Hi plinio,
Last edited by gAr (2011-07-21 21:43:30)
"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense" - Buddha?
"Data! Data! Data!" he cried impatiently.... | {"url":"http://www.mathisfunforum.com/viewtopic.php?pid=181814","timestamp":"2014-04-21T02:20:47Z","content_type":null,"content_length":"14154","record_id":"<urn:uuid:4ec72b72-0f8c-44bd-ab10-4e86e8e2ab94>","cc-path":"CC-MAIN-2014-15/segments/1397609539447.23/warc/CC-MAIN-20140416005219-00270-ip-10-147-4-33.ec2.internal... |
Lawndale, CA Algebra 2 Tutor
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Hello there, my name is Jamie!I have a Bachelor's in Molecular Biology, over 10 years of tutoring, teaching, and home-schooling experience in Los Angeles, CA, and have helped over a hundred
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Please Help With This Problem! I Don't Understand ... | Chegg.com
Please help with this problem! I don't understand how to do itand I need it very urgently. So i would appreciate if you couldjust show the steps and then the answer so I can check my work.Thanks so
A locust jumps by extending its hind legs against the gr... | {"url":"http://www.chegg.com/homework-help/questions-and-answers/please-help-problem-don-t-understand-itand-need-urgently-would-appreciate-couldjust-show-s-q537801","timestamp":"2014-04-18T12:06:24Z","content_type":null,"content_length":"22727","record_id":"<urn:uuid:34e3acd5-ec7b-4df3-a526-897c1b2ef30d>","cc-path":"CC... |
PLS2 with "R"
September 22, 2012
By jrcuesta
I´ve been working these days with PLS2 calibrations with a chemometric software called “Unscrambler” with a data set called “jam”. I said “can I develop PLS2 models with R?”.I look in the book
“Introduction to Multivariate Statistical Analysis in Chemometrics”, and I got the... | {"url":"http://www.r-bloggers.com/pls2-with-r/","timestamp":"2014-04-16T07:34:06Z","content_type":null,"content_length":"38612","record_id":"<urn:uuid:0f39c164-10f1-48ca-aa05-e8a3359e2a29>","cc-path":"CC-MAIN-2014-15/segments/1397609521558.37/warc/CC-MAIN-20140416005201-00498-ip-10-147-4-33.ec2.internal.warc.gz"} |
Batted ball insanity
Fresh from the PITCHf/x Summit, I mean BASEBALLf/x Summit, my mind is full of questions about batted balls and fielder positions. While HITf/x and BASEBALLf/x are not ready for prime time (HITf/x may
be close), I’m thrilled to have a little bit of data on batted balls. By combining April’s HITf/x d... | {"url":"http://www.hardballtimes.com/batted-ball-insanity/","timestamp":"2014-04-17T18:45:49Z","content_type":null,"content_length":"98290","record_id":"<urn:uuid:edb2c5ad-857c-4358-8f2d-6bae5630d874>","cc-path":"CC-MAIN-2014-15/segments/1397609530895.48/warc/CC-MAIN-20140416005210-00037-ip-10-147-4-33.ec2.internal.war... |
Next: Steady-State (DC) Behavior Up: Boundary Conditions for Open Previous: Discrete Model
To illustrate the application of this irreversible open system model to a specific physical system, let us consider the semiconductor heterostructure resonant-tunneling diode (RTD) (Chang, Esaki, and
Tsu, 1974; Sollner et al., 19... | {"url":"http://www.utdallas.edu/~frensley/technical/opensyst/node15.html","timestamp":"2014-04-21T07:36:01Z","content_type":null,"content_length":"7193","record_id":"<urn:uuid:cc8fba75-d90b-42a9-828c-4edae4d46bdf>","cc-path":"CC-MAIN-2014-15/segments/1397609539665.16/warc/CC-MAIN-20140416005219-00583-ip-10-147-4-33.ec2... |
How would I enter the following in my TI-89...
September 9th 2007, 08:16 AM
I think you hit the "submit" button a few too many times. :)
What is 50xx?
To graph the two equations, first solve both for y. Then you go to the "y = " screen and put them into y1 and y2. Then go to your "graph" screen.
September 9... | {"url":"http://mathhelpforum.com/calculators/16702-how-would-i-enter-following-my-ti-89-a-2-print.html","timestamp":"2014-04-16T08:31:23Z","content_type":null,"content_length":"8024","record_id":"<urn:uuid:6c20d0b7-5da0-4d96-bfb8-1218a09aef49>","cc-path":"CC-MAIN-2014-15/segments/1397609521558.37/warc/CC-MAIN-201404160... |
Precoding of signature sequences for CDMA systems - AT&T IPM Corp.
The present invention relates generally to the field of Code Division Multiple Access (CDMA) systems, and more particularly to the reduction of multiple access interference (MAI) in such systems,
e.g., direct sequence CDMA systems.
In digital cellular r... | {"url":"http://www.freepatentsonline.com/5461610.html","timestamp":"2014-04-20T13:25:59Z","content_type":null,"content_length":"70251","record_id":"<urn:uuid:adbd5167-17ac-4d29-8150-843dfa989c89>","cc-path":"CC-MAIN-2014-15/segments/1397609538787.31/warc/CC-MAIN-20140416005218-00440-ip-10-147-4-33.ec2.internal.warc.gz"... |
What I Do, Part 1: Programming languages
[This is the second in an occasional series of posts explaining what I do in my “day job” as a computer science PhD student. The idea is to write a series of posts of increasing specificity, but all
aimed at a general mathematical audience. Previous posts in the series can be fo... | {"url":"http://mathlesstraveled.com/2012/11/28/what-i-do-part-1-programming-languages/","timestamp":"2014-04-16T13:23:50Z","content_type":null,"content_length":"79758","record_id":"<urn:uuid:a8a9c86f-e01d-46aa-9c8c-cf8a4973f71e>","cc-path":"CC-MAIN-2014-15/segments/1397609523429.20/warc/CC-MAIN-20140416005203-00392-ip-... |
The lack of a priori distinctions between learning algorithms
Results 1 - 10 of 93
- Handbook of Agent technology. AAAI , 1999
"... ..."
, 2001
"... All intelligence relies on search --- for example, the search for an intelligent agent's next action. Search is only likely to succeed in resource-bounded agents if they h... | {"url":"http://citeseerx.ist.psu.edu/showciting?cid=18820","timestamp":"2014-04-20T17:23:53Z","content_type":null,"content_length":"39464","record_id":"<urn:uuid:093e16fc-9ba4-4678-96dc-48bead60aeba>","cc-path":"CC-MAIN-2014-15/segments/1397609538824.34/warc/CC-MAIN-20140416005218-00368-ip-10-147-4-33.ec2.internal.warc... |
Math Forum - Problems Library - Geometry - Similarity, Congruence
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Similarity and Congruence
These problems require knowledge of the relations between similar or congruent shapes. Some of the s... | {"url":"http://mathforum.org/library/problems/sets/geo_similarity.html","timestamp":"2014-04-16T10:34:20Z","content_type":null,"content_length":"27143","record_id":"<urn:uuid:d035d8af-3d48-4103-ae1e-2af552d682f1>","cc-path":"CC-MAIN-2014-15/segments/1398223206647.11/warc/CC-MAIN-20140423032006-00352-ip-10-147-4-33.ec2.... |
The Cutting Edge of Mathematics
April 24th 2013, 05:19 AM #1
The Cutting Edge of Mathematics
What would you say are the areas of mathematics that are currently on the cutting edge of research and are still being developed. What new fields of math have emerged in the last few decades?
I find it's interesting tha... | {"url":"http://mathhelpforum.com/math-philosophy/218092-cutting-edge-mathematics.html","timestamp":"2014-04-17T15:04:49Z","content_type":null,"content_length":"36348","record_id":"<urn:uuid:c24f8843-06a8-4659-b9fc-361df5b90a6c>","cc-path":"CC-MAIN-2014-15/segments/1397609536300.49/warc/CC-MAIN-20140416005216-00263-ip-1... |
Physics Confidential by Tony Rothman
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Physics Confidential
PRINCETON – Each February, I begin the introductory electricity and magnetism course at Princeton University by telling my students that the material we will cover during the semester provides the
basis for m... | {"url":"http://www.project-syndicate.org/commentary/physics-confidential","timestamp":"2014-04-20T03:13:12Z","content_type":null,"content_length":"45801","record_id":"<urn:uuid:835e2263-c6b9-411d-b89e-f283b105dd44>","cc-path":"CC-MAIN-2014-15/segments/1398223206647.11/warc/CC-MAIN-20140423032006-00139-ip-10-147-4-33.ec... |
Simultaneous messages vs. communication
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, 1997
"... Publicly accessible databases are an indispensable resource for retrieving up to date information. But they also pose a significant risk to the privacy of the user, since a curious database
operator can follow the user's queries and infer what the... | {"url":"http://citeseerx.ist.psu.edu/showciting?cid=1462731","timestamp":"2014-04-19T19:54:26Z","content_type":null,"content_length":"42368","record_id":"<urn:uuid:fd8c4668-af07-4665-a266-61408d9655e4>","cc-path":"CC-MAIN-2014-15/segments/1397609537376.43/warc/CC-MAIN-20140416005217-00319-ip-10-147-4-33.ec2.internal.wa... |
Algebra Tutors
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to differential equations, including trigonometry, probability, calculus and business calculus, l... | {"url":"http://www.wyzant.com/Bee_Cave_TX_algebra_tutors.aspx","timestamp":"2014-04-17T13:02:53Z","content_type":null,"content_length":"58832","record_id":"<urn:uuid:0f43064c-7c59-44a1-a31c-b5e98cd5a252>","cc-path":"CC-MAIN-2014-15/segments/1397609530131.27/warc/CC-MAIN-20140416005210-00569-ip-10-147-4-33.ec2.internal.... |
Asymptotic Energy Estimates for Nonlinear Petrovsky Plate Model Subject to Viscoelastic Damping
Abstract and Applied Analysis
Volume 2012 (2012), Article ID 419717, 25 pages
Research Article
Asymptotic Energy Estimates for Nonlinear Petrovsky Plate Model Subject to Viscoelastic Damping
School of Mathematical Sciences, ... | {"url":"http://www.hindawi.com/journals/aaa/2012/419717/","timestamp":"2014-04-18T09:03:18Z","content_type":null,"content_length":"1048747","record_id":"<urn:uuid:b9b3533c-9f93-4a66-837c-f7a336ffc85f>","cc-path":"CC-MAIN-2014-15/segments/1397609536300.49/warc/CC-MAIN-20140416005216-00383-ip-10-147-4-33.ec2.internal.war... |
Posts from February 2008 on Gowers's Weblog
I had an email from Noga Alon a couple of days ago, who told me about a much better version of the paradox I discussed in an earlier post. Some of the comments relating to that post also allude to
this better version. The reason it is better is that one can no longer object t... | {"url":"http://gowers.wordpress.com/2008/02/","timestamp":"2014-04-16T10:30:55Z","content_type":null,"content_length":"51026","record_id":"<urn:uuid:915eecb7-31a1-49ac-8799-799bb4c7b1d7>","cc-path":"CC-MAIN-2014-15/segments/1397609523265.25/warc/CC-MAIN-20140416005203-00245-ip-10-147-4-33.ec2.internal.warc.gz"} |
Vineland Math Tutor
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...In all cases, parents and students have been happy with the improvements that they have seen, and one student was able to raise her score from 610 to 710 after only 4 1-hour sessions. I focus
on both skills review and test-taking strategies. I require that students ... | {"url":"http://www.purplemath.com/vineland_math_tutors.php","timestamp":"2014-04-17T13:23:04Z","content_type":null,"content_length":"24114","record_id":"<urn:uuid:0b3e385b-0e30-4394-8f71-5debdc123ad4>","cc-path":"CC-MAIN-2014-15/segments/1397609530131.27/warc/CC-MAIN-20140416005210-00276-ip-10-147-4-33.ec2.internal.war... |
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Topic: question about PDEs
Replies: 0
loh question about PDEs
Posted: Jul ... | {"url":"http://mathforum.org/kb/thread.jspa?threadID=2584128","timestamp":"2014-04-20T21:41:42Z","content_type":null,"content_length":"13701","record_id":"<urn:uuid:bac92dde-1119-4274-a91f-7c64a2f13b58>","cc-path":"CC-MAIN-2014-15/segments/1398223207046.13/warc/CC-MAIN-20140423032007-00016-ip-10-147-4-33.ec2.internal.w... |
force problem
June 27th 2006, 02:03 PM #1
Jun 2006
help please!
Jane and John, with masses if 50 kg and 60 kg, respectively, stand on a frictionless surface 10 m apart. John pulls on a rope that connects him to Jane, giving Jane an acceleration of 0.92 m/s2.
At what rate will John accelerate? What is the di... | {"url":"http://mathhelpforum.com/advanced-math-topics/3820-force-problem.html","timestamp":"2014-04-17T18:36:02Z","content_type":null,"content_length":"38769","record_id":"<urn:uuid:634016fd-d26d-4cbd-bd2b-13ed1aede9f4>","cc-path":"CC-MAIN-2014-15/segments/1397609540626.47/warc/CC-MAIN-20140416005220-00410-ip-10-147-4-... |
Tensor questions
Feel free to throw the math out here.
So are you saying that any tensor has both contravariant and covariant indices, regardless of the fact the index is written up or downstairs? Or any tensor can be converted from contra to co variant?
Thanks for the resource, bcrowell.
Yes. The indexes of a tensor a... | {"url":"http://www.physicsforums.com/showthread.php?p=3231609","timestamp":"2014-04-21T02:14:18Z","content_type":null,"content_length":"48701","record_id":"<urn:uuid:87328b29-92cb-401f-a6fa-326ba0547180>","cc-path":"CC-MAIN-2014-15/segments/1398223206120.9/warc/CC-MAIN-20140423032006-00418-ip-10-147-4-33.ec2.internal.w... |
Residue Cancellation
up vote 1 down vote favorite
I am trying to understand how to apply the residue theorem to solve
$\frac{1}{2\pi j}\int^{\gamma+j\infty}_{\gamma-j\infty}\Gamma(n-s)\Gamma(s)\Gamma(1-s) {}_1F_1(s;b;c) \left(\frac{b}{c}\right)^s\,\mathrm{d}s$
where $n\in\mathbb{N}$, $\,n\ge0$, $\,(b,c)\in\mathbb{R}$ a... | {"url":"http://mathoverflow.net/questions/82695/residue-cancellation","timestamp":"2014-04-21T09:53:47Z","content_type":null,"content_length":"51155","record_id":"<urn:uuid:742fa931-144c-4519-8b3e-4961f4ad2186>","cc-path":"CC-MAIN-2014-15/segments/1397609539705.42/warc/CC-MAIN-20140416005219-00203-ip-10-147-4-33.ec2.in... |
Posts by
Total # Posts: 86
A local bus leaves the stations at 6:00 a.m. and returns to pick up new passengers every 40 minutes. Providing there are no delays and the bus maintains its schedule, what time could the bus NOT
return to the station?
His farn yields 5,000 ears of corn per season. Each year he plans to doubl... | {"url":"http://www.jiskha.com/members/profile/posts.cgi?name=Anonymus","timestamp":"2014-04-18T23:33:17Z","content_type":null,"content_length":"22634","record_id":"<urn:uuid:37ddfbec-4b50-40a8-b76f-09f3cecb828f>","cc-path":"CC-MAIN-2014-15/segments/1397609538787.31/warc/CC-MAIN-20140416005218-00467-ip-10-147-4-33.ec2.i... |
Proposed techniques for communicating the amount of information contained in a statistical result
by Justin Esarey
A couple of weeks ago, I posted about how much we can expect to learn about the state of the world on the basis of a statistical significance test. One way of framing this question is: if we’re
trying to c... | {"url":"http://politicalmethodology.wordpress.com/2013/02/04/proposed-techniques-for-communicating-the-amount-of-information-contained-in-a-statistical-result/","timestamp":"2014-04-17T00:56:21Z","content_type":null,"content_length":"73766","record_id":"<urn:uuid:059a86e1-fc6c-4d28-b2e0-8cef223bbc02>","cc-path":"CC-MAI... |
What is the shape of a tight open trefoil?
up vote 1 down vote favorite
Take an infinitely long rope of diameter 1, ideally flexible and ideally slippery. Tie a trefoil knot into it and pull it tight. Describe the resulting rope shape analytically.
The problem is unsolved for every non-trivial open knot. (And also for ... | {"url":"http://mathoverflow.net/questions/63798/what-is-the-shape-of-a-tight-open-trefoil","timestamp":"2014-04-19T22:52:23Z","content_type":null,"content_length":"58154","record_id":"<urn:uuid:c97b2664-1e2b-480a-a231-341e8f364e30>","cc-path":"CC-MAIN-2014-15/segments/1397609537754.12/warc/CC-MAIN-20140416005217-00178-... |
Re: Mathematics skills for writing a compiler?
vidar@hokstad.name (Vidar Hokstad)
14 Sep 2004 16:39:01 -0400
From comp.compilers
| List of all articles ... | {"url":"http://compilers.iecc.com/comparch/article/04-09-103","timestamp":"2014-04-20T21:02:06Z","content_type":null,"content_length":"6481","record_id":"<urn:uuid:4b63636b-dc64-483a-88ea-9ad024f812f8>","cc-path":"CC-MAIN-2014-15/segments/1397609539230.18/warc/CC-MAIN-20140416005219-00155-ip-10-147-4-33.ec2.internal.wa... |
zero-sum subset problem
June 22nd 2008, 10:17 AM #1
Jun 2008
zero-sum subset problem
Hello everyone.
I have been working on a math problem for some time now, but I can not finish the proof. In other words, I'm stuck. I hope someone here can solve it for me or perhaps we could make it into a
joint effort... | {"url":"http://mathhelpforum.com/number-theory/42160-zero-sum-subset-problem.html","timestamp":"2014-04-19T14:04:34Z","content_type":null,"content_length":"55562","record_id":"<urn:uuid:0f3da6d9-d580-4a05-8d7e-93e7430e4357>","cc-path":"CC-MAIN-2014-15/segments/1398223206647.11/warc/CC-MAIN-20140423032006-00201-ip-10-14... |
Garden City, NY Calculus Tutor
Find a Garden City, NY Calculus Tutor
...Despite over ten years of experience tutoring, I've always kept tutoring as a part-time thing with a limited number of students. I prefer it this way so I can get to know my pupils better. In
addition, this arrangement means that I usually have... | {"url":"http://www.purplemath.com/garden_city_ny_calculus_tutors.php","timestamp":"2014-04-16T07:53:06Z","content_type":null,"content_length":"24448","record_id":"<urn:uuid:4108282b-a69e-4553-8c63-c46ac96ca5af>","cc-path":"CC-MAIN-2014-15/segments/1397609521558.37/warc/CC-MAIN-20140416005201-00218-ip-10-147-4-33.ec2.in... |
Solving a Linear Equation in One Variable
Date: 02/27/98 at 00:00:17
From: gilbert
Subject: Algebra
Please help me with following algebra problems.
Solve for q:
-13 - q - 9 = 5q - 9 - q.
Solve for w:
4(w-5) -5 = -9 - w + 7.
Date: 02/27/98 at 09:05:05
From: Doctor Rob
Subject: Re: Algebra
Your first aim is to get ... | {"url":"http://mathforum.org/library/drmath/view/57454.html","timestamp":"2014-04-19T08:53:57Z","content_type":null,"content_length":"6625","record_id":"<urn:uuid:17b3a5ef-d812-4b87-a482-755b6cec192c>","cc-path":"CC-MAIN-2014-15/segments/1397609536300.49/warc/CC-MAIN-20140416005216-00366-ip-10-147-4-33.ec2.internal.war... |
Norcross, GA Calculus Tutor
Find a Norcross, GA Calculus Tutor
...I have taught middle school math for 3 years and taught high school math for 6 years. I also taught in the college environment for over 10 years and I am currently teaching Math. I have
tutored middle and high school math for 20+ years.
20 Subjects... | {"url":"http://www.purplemath.com/norcross_ga_calculus_tutors.php","timestamp":"2014-04-17T16:18:16Z","content_type":null,"content_length":"23857","record_id":"<urn:uuid:21e5853b-e848-469a-b3ac-77508359007a>","cc-path":"CC-MAIN-2014-15/segments/1397609530136.5/warc/CC-MAIN-20140416005210-00023-ip-10-147-4-33.ec2.intern... |
[FOM] Is Godel's Theorem surprising?
Harvey Friedman friedman at math.ohio-state.edu
Fri Dec 8 05:58:14 EST 2006
On 12/7/06 8:12 AM, "Charles Silver" <silver_1 at mindspring.com> wrote:
> Why should it be so surprising that PA is incomplete, and even (in a
> sense) incompletable?
> Or put the other way, why should we h... | {"url":"http://www.cs.nyu.edu/pipermail/fom/2006-December/011139.html","timestamp":"2014-04-16T19:27:32Z","content_type":null,"content_length":"5592","record_id":"<urn:uuid:f7d2bedb-ead9-4487-a279-bd30e297920d>","cc-path":"CC-MAIN-2014-15/segments/1397609524644.38/warc/CC-MAIN-20140416005204-00455-ip-10-147-4-33.ec2.in... |
Re: How to compute a regex which is the difference between two regexes?
Michiel <mhelvens@gmail.com>
Sun, 3 Jan 2010 13:06:51 -0800 (PST)
From comp.compil... | {"url":"http://compilers.iecc.com/comparch/article/10-01-017","timestamp":"2014-04-20T15:52:47Z","content_type":null,"content_length":"6767","record_id":"<urn:uuid:6a83fb7a-16c9-4766-bedd-df795c8127fb>","cc-path":"CC-MAIN-2014-15/segments/1398223203422.8/warc/CC-MAIN-20140423032003-00098-ip-10-147-4-33.ec2.internal.war... |
Calculate the acceleration of a vehicle
That's what the clutch is for, and if your simulation needs to be that precise, you'll have to model it. Clutch is what allows non-zero engine RPM at zero vehicle velocity, and that's the only way
you'll get a non-zero torque to your wheels.
I'm sorry to be an annoyance, but this... | {"url":"http://www.physicsforums.com/showthread.php?p=3838487","timestamp":"2014-04-17T07:35:35Z","content_type":null,"content_length":"62886","record_id":"<urn:uuid:3e080b19-5686-4975-9b35-b2fe6837e70a>","cc-path":"CC-MAIN-2014-15/segments/1397609526311.33/warc/CC-MAIN-20140416005206-00209-ip-10-147-4-33.ec2.internal.... |
the first resource for mathematics
On a generalized Lorenz canonical form of chaotic systems.
(English) Zbl 1043.37023
Summary: This paper shows that a large class of systems, as the so-called generalized Lorenz system, are state-equivalent to a special canonical form that covers a broader class of chaotic systems.
Thi... | {"url":"http://zbmath.org/?q=an:1043.37023","timestamp":"2014-04-16T16:38:33Z","content_type":null,"content_length":"22671","record_id":"<urn:uuid:0a6ffd52-f02d-49a4-a9ab-f1d15f7f5e05>","cc-path":"CC-MAIN-2014-15/segments/1398223202548.14/warc/CC-MAIN-20140423032002-00031-ip-10-147-4-33.ec2.internal.warc.gz"} |
The Astrolabe Project
The next step in drafting the astrolabe is constructing the calendar scale.
Up until now the process of creating scales has been straightforward. The time scale on the front and the altitude and zodiac scales on the back are simple in concept and execution, requiring no math
to draw. The calendar ... | {"url":"http://www.astrolabeproject.com/page/4/","timestamp":"2014-04-21T15:22:58Z","content_type":null,"content_length":"55831","record_id":"<urn:uuid:dc20752f-4a2c-4f81-bbfc-1255b4266a37>","cc-path":"CC-MAIN-2014-15/segments/1398223206120.9/warc/CC-MAIN-20140423032006-00361-ip-10-147-4-33.ec2.internal.warc.gz"} |
Applying Savitzky-Golay filters in “R”
March 20, 2012
By jrcuesta
When applying SG, we select a moving average window with an odd value “n” for the number of data points. SG fit a polynomial of “p” degree to this data points and give the value to the central point
(this is the reason to have an odd value).
We apply als... | {"url":"http://www.r-bloggers.com/applying-savitzky-golay-filters-in-%E2%80%9Cr%E2%80%9D/","timestamp":"2014-04-18T23:34:07Z","content_type":null,"content_length":"46372","record_id":"<urn:uuid:496e7327-41e0-4aae-bf30-1b25534c203d>","cc-path":"CC-MAIN-2014-15/segments/1398223206672.15/warc/CC-MAIN-20140423032006-00398-... |