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Physics Forums - View Single Post - Standing Wave Speed?
My Friend and I were discussing standing waves and I made problem about speed, inspired off a concept taught in my Physics book: [itex]v = \sqrt {\frac {F_T}{m/L}}[/itex]. My Friend asked a very
valid question: "How in the whole can you defined speed of a standi... | {"url":"http://www.physicsforums.com/showpost.php?p=4239175&postcount=1","timestamp":"2014-04-20T11:21:44Z","content_type":null,"content_length":"8855","record_id":"<urn:uuid:a0ebebf3-d35e-47a2-a9a5-c1b8bf0cc359>","cc-path":"CC-MAIN-2014-15/segments/1397609538423.10/warc/CC-MAIN-20140416005218-00350-ip-10-147-4-33.ec2.... |
One common frustration that I have heard expressed about R is that there is no automatic way to plot error bars (whiskers really) on bar plots. I just encountered this issue revising a paper for
submission and figured I'd share my code. The following simple function will plot reasonable error bars on a bar plot. […] | {"url":"http://monkeysuncle.stanford.edu/?tag=r","timestamp":"2014-04-16T07:13:44Z","content_type":null,"content_length":"25725","record_id":"<urn:uuid:1491d35b-5f21-4fc9-a8b6-654e02ebb8ca>","cc-path":"CC-MAIN-2014-15/segments/1397609521558.37/warc/CC-MAIN-20140416005201-00476-ip-10-147-4-33.ec2.internal.warc.gz"} |
Lesson Plans the Easy Way
Dr. Sandra Kizlik
This section is intended for preservice or beginning teachers.
Curriculum Units Lesson Plans
"There's always more than one way to do anything." The following ideas, information, and example of lesson planning illustrate the point.
School curriculum (what is intended that stud... | {"url":"http://www.adprima.com/easyless.htm","timestamp":"2014-04-17T00:48:33Z","content_type":null,"content_length":"46787","record_id":"<urn:uuid:b21d48ce-fded-4334-90a0-696ddcc42436>","cc-path":"CC-MAIN-2014-15/segments/1398223211700.16/warc/CC-MAIN-20140423032011-00394-ip-10-147-4-33.ec2.internal.warc.gz"} |
Let f(x) = sin(x) and g(x) = cos(x). By combining f and g, create as many functions as possible that are continuous at every real number x.
• We can add or subtract :
(f + g)(x) = (g + f)(x) = sin(x) + cos(x) is continuous at every real number x
• We can multiply:
(fg)(x) = (gf)(x) = (sin x)(cos x) is conti... | {"url":"http://www.shmoop.com/continuity-function/continuity-point-function-examples.html","timestamp":"2014-04-18T11:24:37Z","content_type":null,"content_length":"27345","record_id":"<urn:uuid:85c4ea36-4017-468b-a430-f34cc2117523>","cc-path":"CC-MAIN-2014-15/segments/1398223205137.4/warc/CC-MAIN-20140423032005-00367-i... |
Self-similarity in coagulation equations with nonlocal drift
Seminar Room 1, Newton Institute
In this talk we consider kinetic equations that model coarsening phenomena which involve transport of mass and rearrangement due to coalescence. One expects that solutions converge in the large-time
regime to self-similar form... | {"url":"http://www.newton.ac.uk/programmes/KIT/seminars/2010090611301.html","timestamp":"2014-04-16T13:51:52Z","content_type":null,"content_length":"3965","record_id":"<urn:uuid:ac0ebca6-42a1-4f69-bebe-e352eb58b79d>","cc-path":"CC-MAIN-2014-15/segments/1397609523429.20/warc/CC-MAIN-20140416005203-00365-ip-10-147-4-33.e... |
In physics, renormalization is the process by which the "bare" parameters of a theory (those that appear in the equations) are related to their measurable quantities. In Quantum Field Theory, this is
also used to get rid of infinities arising in loop calculations, and get reasonable results from the theory. But initial... | {"url":"http://everything2.com/title/renormalization","timestamp":"2014-04-19T10:08:34Z","content_type":null,"content_length":"30938","record_id":"<urn:uuid:4f61a8f1-a95d-4b25-bd3c-12f7eb8b2417>","cc-path":"CC-MAIN-2014-15/segments/1398223207985.17/warc/CC-MAIN-20140423032007-00021-ip-10-147-4-33.ec2.internal.warc.gz"} |
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Best Response
You've already chosen the best response.... | {"url":"http://openstudy.com/updates/4ef366aae4b0dc507db72672","timestamp":"2014-04-16T04:45:50Z","content_type":null,"content_length":"32317","record_id":"<urn:uuid:5f314af2-a314-44e9-90ce-8293d6fbf3bb>","cc-path":"CC-MAIN-2014-15/segments/1397609521512.15/warc/CC-MAIN-20140416005201-00505-ip-10-147-4-33.ec2.internal.... |
T-X, P-X and X-X phase diagram sections
Perple_X T-X, P-X and X-X phase diagram sections
This tutorial is out-of-date, it was written for the 06 version of Perple_X. the best current tutorial for the calculation of phase diagram sections is the seismic velocity tutorial. Although the
seismic velocity tutorial illustrat... | {"url":"http://www.perplex.ethz.ch/perplex_tx_pseudosection.html","timestamp":"2014-04-19T09:49:52Z","content_type":null,"content_length":"70374","record_id":"<urn:uuid:0635c47c-6cd6-4af2-b36e-ef52e9a58279>","cc-path":"CC-MAIN-2014-15/segments/1397609537097.26/warc/CC-MAIN-20140416005217-00563-ip-10-147-4-33.ec2.intern... |
Height and Weight
The passengers normal weight is 724 N
At the top of the Ferris Wheel all I need to do is add the normal weight to the gravitation weight.
The passenger's weight
the gravitational weight. Two forces act on the passenger at each point:
(1) the
normal force
(also called, confusingly, the "apparent" weigh... | {"url":"http://www.physicsforums.com/showthread.php?t=176812","timestamp":"2014-04-16T10:36:51Z","content_type":null,"content_length":"60919","record_id":"<urn:uuid:d3c62078-aee2-4d48-a32d-635f6d18cd31>","cc-path":"CC-MAIN-2014-15/segments/1398223202457.0/warc/CC-MAIN-20140423032002-00629-ip-10-147-4-33.ec2.internal.wa... |
Parallel forms and cohomology of symmetric spaces
up vote 2 down vote favorite
Let $G/H$ be a compact symmetric space. Then I believe the following is true: if $\alpha \in \Omega^k(G/H)$ and $\nabla$ the Levi-Civita connection, then $$ (\alpha \text{ is induced by an $\
operatorname{Ad} H$ element of $\Lambda^* \mathfr... | {"url":"http://mathoverflow.net/questions/126906/parallel-forms-and-cohomology-of-symmetric-spaces","timestamp":"2014-04-16T16:29:07Z","content_type":null,"content_length":"59573","record_id":"<urn:uuid:de8b4b3a-5e3c-4b47-b973-c87f294991b2>","cc-path":"CC-MAIN-2014-15/segments/1397609524259.30/warc/CC-MAIN-201404160052... |
CFI Forums | The two envelopes problem
14 of 132 « First Prev 12 13 14 15 16 Next Last »
The two envelopes problem
StephenLawrence Posted: 24 January 2012 12:35 AM [ Ignore ] [ # 196 ]
Sr. Member He is pretty damn thick. And he seems to be willfully so
Total Posts: 5939 This is not like you.
Joined 2006-12... | {"url":"http://www.centerforinquiry.net/forums/viewthread/12459/P195/","timestamp":"2014-04-18T13:08:17Z","content_type":null,"content_length":"97042","record_id":"<urn:uuid:dba548b5-0187-4ea6-9835-03f43f14edd4>","cc-path":"CC-MAIN-2014-15/segments/1397609533689.29/warc/CC-MAIN-20140416005213-00354-ip-10-147-4-33.ec2.i... |
Cut normal forms and proof complexity
Results 1 - 10 of 14
- Journal of Symbolic Computation , 2000
"... A new cut-elimination method for Gentzen’s LK is defined. First cut-elimination is generalized to the problem of redundancy-elimination. Then the elimination of redundancy in LK-proofs is
performed by a resolution m... | {"url":"http://citeseerx.ist.psu.edu/showciting?cid=656172","timestamp":"2014-04-18T08:50:53Z","content_type":null,"content_length":"36746","record_id":"<urn:uuid:b088d3a2-b468-43d7-b349-31b924e6f881>","cc-path":"CC-MAIN-2014-15/segments/1397609533121.28/warc/CC-MAIN-20140416005213-00516-ip-10-147-4-33.ec2.internal.war... |
An Exciting Technique for Quality Analysis
The impulse excitation technique is finding widespread use in the high-tech ceramic industry as an easy-to-use research and quality control tool.
The impulse excitation technique-also known as the impulse excitation of vibration, resonant vibration, impact acoustic resonance, ... | {"url":"http://www.ceramicindustry.com/articles/an-exciting-technique-for-quality-analysis","timestamp":"2014-04-21T14:45:43Z","content_type":null,"content_length":"73430","record_id":"<urn:uuid:b648d948-b441-4e40-907d-2d67dad63d59>","cc-path":"CC-MAIN-2014-15/segments/1397609540626.47/warc/CC-MAIN-20140416005220-00035... |
BIOL398-03/S13:Class Journal Week 13
From OpenWetWare
(Difference between revisions)
(→Matthew E. Jurek Week 13: answered the final question) (→James P. McDonald: answered question 4)
← Previous diff ... | {"url":"http://openwetware.org/index.php?title=BIOL398-03/S13:Class_Journal_Week_13&diff=prev&oldid=692866","timestamp":"2014-04-17T04:43:55Z","content_type":null,"content_length":"28894","record_id":"<urn:uuid:3967ff34-e7a6-4aa1-9840-996fc4d6cdf1>","cc-path":"CC-MAIN-2014-15/segments/1397609526252.40/warc/CC-MAIN-2014... |
Math Forum: Math Library - Fractals
1. Fractals - Cynthia Lanius
This lesson plan for exploring fractals is designed so 4th through 8th grade students can work independently and be assessed innovatively. It conforms to the 1989 NCTM standards, and provides
links to other fractal sites. Contents: Why study frac... | {"url":"http://mathforum.org/library/topics/fractals/?keyid=40092871&start_at=1&num_to_see=50","timestamp":"2014-04-17T05:43:29Z","content_type":null,"content_length":"39162","record_id":"<urn:uuid:a11cd2d6-3200-4eba-9200-d3b611852933>","cc-path":"CC-MAIN-2014-15/segments/1397609526252.40/warc/CC-MAIN-20140416005206-00... |
CBSE 12th Maths Blue print CBSE blue print for class 12th Maths CBSE Class XII Mathematics Blue Print
CBSE 12th Maths Blue print CBSE blue print for class 12th Maths CBSE Class XII Mathematics Blue Print Download
Tags : 12th Maths, CBSE, Results, .
CBSE 12th Maths Blue print CBSE blue print for class 12th Maths CBSE Cl... | {"url":"http://www.kinindia.com/school/cbse-12th-maths-blue-print/","timestamp":"2014-04-17T12:39:18Z","content_type":null,"content_length":"16639","record_id":"<urn:uuid:ad858f1e-8ac4-41cb-bf43-cef0a285657e>","cc-path":"CC-MAIN-2014-15/segments/1397609530131.27/warc/CC-MAIN-20140416005210-00473-ip-10-147-4-33.ec2.inte... |
Rotation in Two Dimensions
BELIEVE ME NOT! - - A SKEPTICs GUIDE
Next: Rotating Space into Time Up: A Rotational Analogy Previous: A Rotational Analogy
Suppose we have a point A in a plane with perpendicular x and y coordinate axes scri... | {"url":"http://www.jick.net/~jess/hr/skept/STR/node16.html","timestamp":"2014-04-19T06:59:34Z","content_type":null,"content_length":"6065","record_id":"<urn:uuid:fa363ea2-81fa-4ef3-8619-4e9f6dcfd556>","cc-path":"CC-MAIN-2014-15/segments/1398223206672.15/warc/CC-MAIN-20140423032006-00336-ip-10-147-4-33.ec2.internal.warc... |
e to the i pi misunderstanding
March 13th 2009, 12:18 PM #1
Mar 2009
e to the i pi misunderstanding
Dunno if this should go in this subforum, but I came across it working on a differential equation.
So e^(xi) = cosx + isinx,
therefore e^(i*pi) = -1.
And (-1)^(1/(1+\-2k)) = -1, where k is any integer... | {"url":"http://mathhelpforum.com/differential-equations/78564-e-i-pi-misunderstanding.html","timestamp":"2014-04-25T08:20:31Z","content_type":null,"content_length":"37181","record_id":"<urn:uuid:1b3f29e5-b5e0-4c8b-8565-3798232ef53d>","cc-path":"CC-MAIN-2014-15/segments/1398223211700.16/warc/CC-MAIN-20140423032011-00188... |
Hypothesis Testing
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Statistical hypothesis testing is used to assess the strength of the evidence in a random sample against a stated null hypothesis concerning a population parameter. A null hypothesis is a conjecture
about a population parameter that is stated as a mathe... | {"url":"https://wiki.uiowa.edu/display/bstat/Hypothesis+Testing","timestamp":"2014-04-16T10:17:09Z","content_type":null,"content_length":"53126","record_id":"<urn:uuid:d45a1019-5cb1-444a-86d5-17f78292909c>","cc-path":"CC-MAIN-2014-15/segments/1397609523265.25/warc/CC-MAIN-20140416005203-00567-ip-10-147-4-33.ec2.interna... |
vectors and mass
July 15th 2006, 09:03 AM
vectors and mass
A particle of mass m kg is acted on by two forces F1 and F2 with magnitudes 3root5 newtons and root5 newtons ad drections parallel to the vectors i+2j and i-2j respectively
The particle is initially at a position given by vector 2i+j
iv calculated t... | {"url":"http://mathhelpforum.com/geometry/4155-vectors-mass-print.html","timestamp":"2014-04-21T10:36:28Z","content_type":null,"content_length":"5983","record_id":"<urn:uuid:ac6e603a-0a5a-4865-8f0a-4aa96689c013>","cc-path":"CC-MAIN-2014-15/segments/1398223203235.2/warc/CC-MAIN-20140423032003-00016-ip-10-147-4-33.ec2.in... |
Help with assumption (thick walled theory)
I have a solid cylindrical shaft with a mounted ring on it.
My ring is subjected to a point load, I have with this load and the geometry of the ring used a special beam theory called Winkler Bedding. By using that theory I get the deflection of my "beam".
This deflection is th... | {"url":"http://www.physicsforums.com/showthread.php?p=2094897","timestamp":"2014-04-21T14:55:43Z","content_type":null,"content_length":"19747","record_id":"<urn:uuid:5bf41cbb-eddc-4fb6-916c-81d921b0e438>","cc-path":"CC-MAIN-2014-15/segments/1397609540626.47/warc/CC-MAIN-20140416005220-00197-ip-10-147-4-33.ec2.internal.... |
Brooklyn, NY Precalculus Tutor
Find a Brooklyn, NY Precalculus Tutor
...There is a full list of subjects I tutor in my profile. If you have questions about my proficiency in a specific area, just ask. My day job is running Simply Grid, a clean energy company.
46 Subjects: including precalculus, chemistry, reading... | {"url":"http://www.purplemath.com/brooklyn_ny_precalculus_tutors.php","timestamp":"2014-04-19T07:09:19Z","content_type":null,"content_length":"23860","record_id":"<urn:uuid:a79bbb50-e506-4cfb-8027-cfcdbf7057a1>","cc-path":"CC-MAIN-2014-15/segments/1397609536300.49/warc/CC-MAIN-20140416005216-00324-ip-10-147-4-33.ec2.in... |
[FOM] "choice of concepts"
Monroe Eskew meskew at math.uci.edu
Tue Aug 3 17:24:19 EDT 2010
Vaughan Pratt claimed that theology differs from mathematics mainly in
the choice of concepts:
"I would think the essential difference is in the choice of concepts.
Whereas mathematics is about the sorts of abstractions that aris... | {"url":"http://www.cs.nyu.edu/pipermail/fom/2010-August/014961.html","timestamp":"2014-04-18T23:51:37Z","content_type":null,"content_length":"3388","record_id":"<urn:uuid:b3db4d94-92d1-47a2-92e9-a6681c77369d>","cc-path":"CC-MAIN-2014-15/segments/1397609535535.6/warc/CC-MAIN-20140416005215-00610-ip-10-147-4-33.ec2.inter... |
188 helpers are online right now
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is replying to Can someone tell me what button the professor is hitting...
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Here's the question you clicked on:
could i get some help with this?
• one year ago
• one year... | {"url":"http://openstudy.com/updates/50a12ef6e4b05517d536a47e","timestamp":"2014-04-21T07:35:15Z","content_type":null,"content_length":"125358","record_id":"<urn:uuid:5f825f79-b6ba-470c-8d08-8cddc94cdfc7>","cc-path":"CC-MAIN-2014-15/segments/1397609539665.16/warc/CC-MAIN-20140416005219-00057-ip-10-147-4-33.ec2.internal... |
A shrinkage estimator for beta
In the post pairs trading issues one of the problems raised was the unstable estimates of the stock’s beta with respect to the market. Here is a suggestion for a possible solution, which is not
really a solution but more stuff to do to make you feel less stupid when trading based on your ... | {"url":"http://eranraviv.com/blog/a-shrinkage-estimator-for-beta/","timestamp":"2014-04-16T04:12:17Z","content_type":null,"content_length":"56829","record_id":"<urn:uuid:b4b4a8c3-5637-4e16-9ea4-3248ff64fb11>","cc-path":"CC-MAIN-2014-15/segments/1397609521512.15/warc/CC-MAIN-20140416005201-00129-ip-10-147-4-33.ec2.inter... |
Homework Help
Posted by Ms. Jackie on Tuesday, October 16, 2012 at 9:47pm.
Find the functional values requested in the problem;
(a) h(0)=
Related Questions
Math - How will I work this problem? Find the functional values requested in the...
math - find the functional values requested in the problem F(x)=x^2-25t (a)F(5t.... | {"url":"http://www.jiskha.com/display.cgi?id=1350438463","timestamp":"2014-04-21T00:30:19Z","content_type":null,"content_length":"8361","record_id":"<urn:uuid:b2ed0a79-98d7-4e81-ad44-df74ae301650>","cc-path":"CC-MAIN-2014-15/segments/1397609539337.22/warc/CC-MAIN-20140416005219-00141-ip-10-147-4-33.ec2.internal.warc.gz... |
O(n) algorithm to find out the element appearing more than n/2 times
up vote 5 down vote favorite
I was asked in an interview to give an O(n) algorithm to print an element that appears more than n/2 times in an array, if there is such an element. n is the size of the array. I don't have any clue
on how to do this. Can ... | {"url":"http://stackoverflow.com/questions/4496002/on-algorithm-to-find-out-the-element-appearing-more-than-n-2-times","timestamp":"2014-04-19T02:36:53Z","content_type":null,"content_length":"89465","record_id":"<urn:uuid:724584c9-d35f-4e47-a2d4-f6d9c2de6def>","cc-path":"CC-MAIN-2014-15/segments/1397609535745.0/warc/CC... |
Zeno's Paradox
Date: 10/19/95 at 7:42:10
From: Gut, Thomas
Please help me with an answer to the following problem.
At eleven o'clock I put ten balls numbered 1,2, ...10 in a box and
immediately take out the ball numbered 1. At eleven thirty I put
balls numbered 11 through 20 into the box and take out the ball
numbered... | {"url":"http://mathforum.org/library/drmath/view/55633.html","timestamp":"2014-04-16T20:03:10Z","content_type":null,"content_length":"6805","record_id":"<urn:uuid:30b3116e-13aa-42d3-8861-7fb822565ec5>","cc-path":"CC-MAIN-2014-15/segments/1398223203841.5/warc/CC-MAIN-20140423032003-00617-ip-10-147-4-33.ec2.internal.warc... |
Stat Computing Visions from the Past
November 18, 2010
By martin
I recently stumbled upon an old paper of a presentation I gave at the Interface conference in 1998, entitled “JAVA – the next Generation of Statistical Computing?”:
It is very interesting to compare the things I envisioned 12 years ago and what actually c... | {"url":"http://www.r-bloggers.com/stat-computing-visions-from-the-past/","timestamp":"2014-04-16T19:16:49Z","content_type":null,"content_length":"35887","record_id":"<urn:uuid:9053d61f-d39c-4787-8303-b24cb892a930>","cc-path":"CC-MAIN-2014-15/segments/1398223203422.8/warc/CC-MAIN-20140423032003-00130-ip-10-147-4-33.ec2.... |
A question about regularity of foliations
up vote 5 down vote favorite
Let $F$ be a smooth foliation of a torus. Assume that $F$ can be mapped by a homeomorphism to an irrational-straight-line foliation $L$. Does it follow that $F$ can be mapped to $L$ by a
I am interested in 2 dimensional case and higher dimensional c... | {"url":"http://mathoverflow.net/questions/31336/a-question-about-regularity-of-foliations","timestamp":"2014-04-16T19:51:57Z","content_type":null,"content_length":"61056","record_id":"<urn:uuid:b74d5131-ce71-4572-a6c8-ed31eb745805>","cc-path":"CC-MAIN-2014-15/segments/1398223201753.19/warc/CC-MAIN-20140423032001-00276-... |
Math Puzzle: Hunting Deer
Two hunters killed a deer and sold it by the pound in the woods. They had no proper means of weighing it, but knew their own weights-one 130 pounds and the other 190 pounds. They placed a rail across
a fence so that it balanced with one of them on each end. They then exchanged places, the ligh... | {"url":"http://www.smart-kit.com/s4544/math-puzzle-hunting-deer/","timestamp":"2014-04-21T00:19:17Z","content_type":null,"content_length":"45221","record_id":"<urn:uuid:a22a0598-bae9-493d-bc8d-baa162d26860>","cc-path":"CC-MAIN-2014-15/segments/1398223202774.3/warc/CC-MAIN-20140423032002-00556-ip-10-147-4-33.ec2.interna... |
Skills Tested: Silver Level
In addition to the skills required for a Bronze certificate, Silver certification requires competence in the following areas:
Applied Mathematics
• Solve problems that require one or two operations
• Multiply negative numbers
• Calculate averages, simple ratios, simple proportions, or ... | {"url":"http://www.crcnc.org/info/silver.aspx","timestamp":"2014-04-17T18:23:18Z","content_type":null,"content_length":"6888","record_id":"<urn:uuid:480f9e6b-77a9-45b6-bf71-5a3c158c0c85>","cc-path":"CC-MAIN-2014-15/segments/1397609530895.48/warc/CC-MAIN-20140416005210-00002-ip-10-147-4-33.ec2.internal.warc.gz"} |
Proposed Update Unicode Technical Report #25
Unicode Support for Mathematics
│ Authors │ Barbara Beeton (bnb@ams.org), Asmus Freytag (asmus@unicode.org), Murray Sargent III (murrays@microsoft.com) │
│ Date │ 2005-0... | {"url":"http://www.unicode.org/reports/tr25/tr25-7.html","timestamp":"2014-04-18T03:04:16Z","content_type":null,"content_length":"189197","record_id":"<urn:uuid:b4ad619f-120a-473e-bd1f-dfceb54fbafe>","cc-path":"CC-MAIN-2014-15/segments/1397609532480.36/warc/CC-MAIN-20140416005212-00196-ip-10-147-4-33.ec2.internal.warc.... |
Christensen, Dan - Department of Mathematics, University of Western Ontario
• Algebraic Topology (Math 4152/9052), Winter 2010, Reading Material The following is a list of books that you might like to refer to to supplement the lectures.
• Nomination guidelines The 2010 Faculty of Science Award of Excellence for ... | {"url":"http://www.osti.gov/eprints/topicpages/documents/starturl/16/151.html","timestamp":"2014-04-20T12:44:13Z","content_type":null,"content_length":"44172","record_id":"<urn:uuid:ffc3f1b4-5053-49af-8aeb-122a97b3adbb>","cc-path":"CC-MAIN-2014-15/segments/1397609538423.10/warc/CC-MAIN-20140416005218-00523-ip-10-147-4-... |
Mathematics Classroom Resources - Center for Occupational Research and Development
Mathematics Classroom Resources
CORD's original mathematics curriculum, CORD Applied Mathematics, enabled thousands of high school students to master algebra and geometry concepts in a meaningful way, through a variety of concrete
experi... | {"url":"http://www.cord.org/mathematics-classroom-resources/","timestamp":"2014-04-18T20:43:40Z","content_type":null,"content_length":"15675","record_id":"<urn:uuid:1079e819-4320-4e6f-809b-8d80f3ccf182>","cc-path":"CC-MAIN-2014-15/segments/1398223206147.1/warc/CC-MAIN-20140423032006-00230-ip-10-147-4-33.ec2.internal.wa... |
Cubical sets and their site
Marco Grandis and Luca Mauri
Extended cubical sets (with connections and interchanges) are presheaves on a ground category, the extended cubical site K, corresponding to the (augmented) simplicial site, the category of finite
ordinals. We prove here that K has characterisations similar to th... | {"url":"http://www.kurims.kyoto-u.ac.jp/EMIS/journals/TAC/volumes/11/8/11-08abs.html","timestamp":"2014-04-18T13:46:56Z","content_type":null,"content_length":"2426","record_id":"<urn:uuid:9a2be525-b8c4-48e6-9846-0c3a658a1b3f>","cc-path":"CC-MAIN-2014-15/segments/1397609533689.29/warc/CC-MAIN-20140416005213-00657-ip-10-... |
For what values of the parameter does this function have an elementary anti-derivative?
up vote 1 down vote favorite
I am a grad student working on some independent research trying to derive some exact formulas for a particular class of power series. During my study I came across the following integral which would
lead... | {"url":"http://mathoverflow.net/questions/124565/for-what-values-of-the-parameter-does-this-function-have-an-elementary-anti-deri","timestamp":"2014-04-19T02:31:16Z","content_type":null,"content_length":"55667","record_id":"<urn:uuid:ca4ed53c-3024-4bd5-92a6-c46595b3cccc>","cc-path":"CC-MAIN-2014-15/segments/13976095357... |
Review: R in a Nutshell by Joseph Adler
January 17, 2011
By Robin Wilson
Summary: Very comprehensive and very useful, but not good for a beginner. Great book though – definitely has a place on my bookshelf.
Reference: Adler, J., 2010, R in a Nutshell, O’Reilly, Sebastopol, CA, 611 pages Amazon Link O’Reilly Link
After... | {"url":"http://www.r-bloggers.com/review-r-in-a-nutshell-by-joseph-adler/","timestamp":"2014-04-18T00:41:56Z","content_type":null,"content_length":"38415","record_id":"<urn:uuid:5798f38d-8912-40a8-a450-c19ccda059ec>","cc-path":"CC-MAIN-2014-15/segments/1397609532374.24/warc/CC-MAIN-20140416005212-00567-ip-10-147-4-33.e... |
puzzle 122 as a tiling problem of a sphere: in fact, we can imagine that every polygonal face tiling the sphere contains a hole in its center, as well as one facing each of its sides (fig. 1).
If the sphere was tiled only with hexagons, the numbers of edges (E) would be (6 x H)/2, in total (since each hexagons’ side/ed... | {"url":"http://archimedes-lab.org/monthly_puzzles_77.html","timestamp":"2014-04-19T17:32:33Z","content_type":null,"content_length":"60846","record_id":"<urn:uuid:3c0f5c2c-3aa3-41fa-8b23-4623b3202ca4>","cc-path":"CC-MAIN-2014-15/segments/1397609537308.32/warc/CC-MAIN-20140416005217-00436-ip-10-147-4-33.ec2.internal.warc... |
Calculating PI using the Monte Carlo method using F#
Earlier in my career I spent a number of years designing electronic circuits using circuit simulation software. One of the most important steps within the design process is to determine how robust
the circuit will be to different scenarios such as temperature changes... | {"url":"http://pebblesteps.com/post/Calculating-PI-using-the-Monte-Carlo-method-using-F.aspx","timestamp":"2014-04-18T08:09:42Z","content_type":null,"content_length":"25951","record_id":"<urn:uuid:34eafee6-3007-4211-8334-52d3ce9f8808>","cc-path":"CC-MAIN-2014-15/segments/1398223203235.2/warc/CC-MAIN-20140423032003-0034... |
Right triangles
November 9th 2009, 01:20 PM #1
Nov 2009
sorry for the semi dumb question, but can anyone help me.
I was wondering how do you find the sides of a right triangle if all you know is the angles.
For example, I know that Theta (θ) is 10° therefor the angles are 10°, 90°, 80°. what would the s... | {"url":"http://mathhelpforum.com/trigonometry/113503-right-triangles.html","timestamp":"2014-04-17T01:21:06Z","content_type":null,"content_length":"33436","record_id":"<urn:uuid:dff54e05-6c39-41cc-b658-977043dfa80c>","cc-path":"CC-MAIN-2014-15/segments/1397609526102.3/warc/CC-MAIN-20140416005206-00620-ip-10-147-4-33.ec... |
Blawenburg Science Tutor
Find a Blawenburg Science Tutor
...I am also a member of the varsity cross country and track teams at TCNJ and would like to become a high school coach in the future. I am currently completing an undergraduate physics teaching
program and plan on becoming a high school physics teacher next ... | {"url":"http://www.purplemath.com/blawenburg_nj_science_tutors.php","timestamp":"2014-04-18T01:07:05Z","content_type":null,"content_length":"24024","record_id":"<urn:uuid:acf384ff-ae63-4874-9724-74182d504f63>","cc-path":"CC-MAIN-2014-15/segments/1398223205375.6/warc/CC-MAIN-20140423032005-00055-ip-10-147-4-33.ec2.inter... |
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What is the relationship between the volume of 2 prisms. 50 ft... | {"url":"http://openstudy.com/updates/50685fe9e4b06e532421c5b0","timestamp":"2014-04-17T16:37:47Z","content_type":null,"content_length":"49035","record_id":"<urn:uuid:b62e123e-6a90-4a3d-b578-8829b77ef5ca>","cc-path":"CC-MAIN-2014-15/segments/1397609530136.5/warc/CC-MAIN-20140416005210-00408-ip-10-147-4-33.ec2.internal.w... |
A repair/misrepair cell kinetics model is superimposed onto the track structure model of Katz to provide for a repair mechanism. The model is tested on the repair-dependent data of Yang et al. and
provides an adequate description of that data. The misrepair rate determines the maximum relative biological effectiveness ... | {"url":"http://www.nzdl.org/gsdlmod?e=d-00000-00---off-0cstr--00-0----0-10-0---0---0direct-10---4-------0-1l--11-en-50---20-about---00-0-1-00-0--4----0-0-11-10-0utfZz-8-00&a=d&cl=CL1.267&d=HASH66d5fd7cdd2baedd932681.2","timestamp":"2014-04-16T13:28:55Z","content_type":null,"content_length":"12309","record_id":"<urn:uui... |
Sine Scrollbars
3 Comments
1. You clearly have too much time on your hands. Extremely cool.
2. In your code I noticed you used a funtion name “~~()”. Can you explain what this function does and if it is a part of the core Javascript language.
3. That’s just a lil’ trick: the ~ is JavaScript’s bitwise NOT operator. A... | {"url":"http://www.mrspeaker.net/2010/01/18/sine-scrollbars/","timestamp":"2014-04-20T23:46:43Z","content_type":null,"content_length":"20317","record_id":"<urn:uuid:042f1a6d-2b3c-4270-9f4d-3edf844da32c>","cc-path":"CC-MAIN-2014-15/segments/1397609539337.22/warc/CC-MAIN-20140416005219-00224-ip-10-147-4-33.ec2.internal.w... |
Algorithmic complexity & STL
[followups directed to news:comp.programming]
Generic Usenet Account wrote:
> Consider two entities A and B such that there is a 1:n association
> between them. I mean that associated with each instance of A there are
> up to n instances of B. Currently in our software we are using an STL
>... | {"url":"http://www.velocityreviews.com/forums/t400805-algorithmic-complexity-and-stl.html","timestamp":"2014-04-20T18:43:11Z","content_type":null,"content_length":"42365","record_id":"<urn:uuid:46c24558-6188-48bb-9d23-8aaafe5f983f>","cc-path":"CC-MAIN-2014-15/segments/1397609539066.13/warc/CC-MAIN-20140416005219-00296-... |
Joseph A. Schatz
Sandia Laboratory Technical Memorandum, 1967.
Abstract: This report is a discussion of the nature of truth. It is not a balanced account. It consists principally of a discussion of fundamental weaknesses in current mathematical reasoning.
The purpose of doing this is not to conclude that tr... | {"url":"http://www.csc.ncsu.edu/faculty/doyle/jas/","timestamp":"2014-04-17T12:29:18Z","content_type":null,"content_length":"5780","record_id":"<urn:uuid:529b3787-05ef-44d0-8af4-f7b665383195>","cc-path":"CC-MAIN-2014-15/segments/1397609530131.27/warc/CC-MAIN-20140416005210-00171-ip-10-147-4-33.ec2.internal.warc.gz"} |
Induction help me please
January 31st 2013, 03:15 PM
Induction help me please
Consider the following recursive definition of the set of all propositional formulas F
Base Case: ∀i ∈ N pi ∈ F (pi is a propositional variable) 1
3. We can define sorted lists of integers as follows.
InductionStep: –∀f∈F¬f∈F
... | {"url":"http://mathhelpforum.com/discrete-math/212371-induction-help-me-please-print.html","timestamp":"2014-04-19T13:25:34Z","content_type":null,"content_length":"18719","record_id":"<urn:uuid:4690c45b-9346-4377-a5ff-6857d2f6fd4f>","cc-path":"CC-MAIN-2014-15/segments/1397609537186.46/warc/CC-MAIN-20140416005217-00359-... |
In vague generalities, how much does distance affect pinion preload? [Archive] - Chevelle Tech
Dec 20th, 09, 1:44 PM
i know, I know, all gears and housings are different. So are bicycle wheels, and I have trued enough of them to know that about 1/8 of a turn on the spoke nipple pulls a rim 1/32" or so laterally. So
I ... | {"url":"http://www.chevelles.com/forums/archive/index.php/t-301525.html","timestamp":"2014-04-16T04:11:17Z","content_type":null,"content_length":"12030","record_id":"<urn:uuid:cd5a5d70-9582-49a9-a010-690e91b0a010>","cc-path":"CC-MAIN-2014-15/segments/1397609521512.15/warc/CC-MAIN-20140416005201-00094-ip-10-147-4-33.ec2... |
188 helpers are online right now
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Thanks... | {"url":"http://openstudy.com/users/coreymacg/asked","timestamp":"2014-04-18T14:01:50Z","content_type":null,"content_length":"97287","record_id":"<urn:uuid:ea609e51-32a7-491d-9dd7-4e191c43865d>","cc-path":"CC-MAIN-2014-15/segments/1397609533689.29/warc/CC-MAIN-20140416005213-00294-ip-10-147-4-33.ec2.internal.warc.gz"} |
Solving a DC Circuit with OpAmp
Hey everyone,
I am trying to solve for the circuit that I have attached.
So I know that for a opamp, it does not draw any currents into its input side and the nodes b and c are the same potential. To figure out the potential at node b, i need to know I_6, but that 6k
resistor is messing ... | {"url":"http://www.physicsforums.com/showthread.php?t=586745","timestamp":"2014-04-19T04:39:53Z","content_type":null,"content_length":"39908","record_id":"<urn:uuid:189a7009-8e26-4d7b-9c10-92f5fb3c9ec3>","cc-path":"CC-MAIN-2014-15/segments/1398223206770.7/warc/CC-MAIN-20140423032006-00169-ip-10-147-4-33.ec2.internal.wa... |
Ring of fractions & pid
June 22nd 2011, 06:05 AM #1
May 2011
Ring of fractions & pid
Let R is a principal ideal domain(PID) and D is a multiplicatively closed subset of R.Then prove that the RING OF FRACTIONS OF D WITH RESPECT TO R(D INVERSE R) is a PID.
How to do the sum?
I have proved it when D=R-0. W... | {"url":"http://mathhelpforum.com/advanced-algebra/183445-ring-fractions-pid.html","timestamp":"2014-04-16T17:30:23Z","content_type":null,"content_length":"45128","record_id":"<urn:uuid:6bda870b-d2d7-4720-bb99-aff2e88e51e8>","cc-path":"CC-MAIN-2014-15/segments/1398223203235.2/warc/CC-MAIN-20140423032003-00000-ip-10-147-... |
Mental Math Tricks to Impress Your Friends
One thing that fascinates me is performing mental math. Being able to quickly perform additions, subtraction, multiplications etc is a good way to impress your friends. The problem is, I’m not a math
genius, and I don’t know much behind simple arithmetic.
If you’re anything li... | {"url":"http://freestylemind.com/mental-math-tricks","timestamp":"2014-04-17T07:05:52Z","content_type":null,"content_length":"21028","record_id":"<urn:uuid:dbdd09dd-3297-4f19-9992-95417d3b119f>","cc-path":"CC-MAIN-2014-15/segments/1397609526311.33/warc/CC-MAIN-20140416005206-00447-ip-10-147-4-33.ec2.internal.warc.gz"} |
Sands Point, NY SAT Math Tutor
Find a Sands Point, NY SAT Math Tutor
...I am an economic historian and am currently working on a number of papers for presentation at conferences. I am equally familiar with American and global history. I have taught chemistry
privately and in college for over thirty years and have B... | {"url":"http://www.purplemath.com/sands_point_ny_sat_math_tutors.php","timestamp":"2014-04-20T21:28:16Z","content_type":null,"content_length":"24505","record_id":"<urn:uuid:a3fc2848-2998-416e-81ef-93f719fb8dda>","cc-path":"CC-MAIN-2014-15/segments/1397609539230.18/warc/CC-MAIN-20140416005219-00560-ip-10-147-4-33.ec2.in... |
Two algorithms for constructing a Delaunay triangulation
Results 1 - 10 of 88
- ACM COMPUTING SURVEYS , 1991
"... This paper presents a survey of the Voronoi diagram, one of the most fundamental data structures in computational geometry. It demonstrates the importance and usefulness of the Voronoi diagram
in a wide var... | {"url":"http://citeseerx.ist.psu.edu/showciting?cid=71591","timestamp":"2014-04-18T12:51:05Z","content_type":null,"content_length":"36185","record_id":"<urn:uuid:06717987-0896-4271-bf38-274267687be0>","cc-path":"CC-MAIN-2014-15/segments/1397609533308.11/warc/CC-MAIN-20140416005213-00364-ip-10-147-4-33.ec2.internal.warc... |
[Numpy-discussion] תשובה: faster in1d() for monotonic case?
[Numpy-discussion] תשובה: faster in1d() for monotonic case?
Michael Katz michaeladamkatz@yahoo....
Tue Jun 21 10:15:50 CDT 2011
I'm not quite sure how to use searchsorted to get the output I need (e.g., the
length of the output needs to be as long as large_ar... | {"url":"http://mail.scipy.org/pipermail/numpy-discussion/2011-June/056973.html","timestamp":"2014-04-17T06:52:16Z","content_type":null,"content_length":"5466","record_id":"<urn:uuid:007027cc-0fe9-4ac4-b62f-786f69f661d7>","cc-path":"CC-MAIN-2014-15/segments/1397609537804.4/warc/CC-MAIN-20140416005217-00663-ip-10-147-4-3... |
Loop quantum gravity
From the point of view of Einstein´s theory, it comes as no surprise that all attempts to treat gravity simply like one more quantum force (on par with electromagnetism and the nuclear forces) have
failed. According to Einstein, gravity is not a force – it is a property of space-time itself. Loop q... | {"url":"http://www.einstein-online.info/elementary/quantum/loops/?set_language=en","timestamp":"2014-04-20T06:00:17Z","content_type":null,"content_length":"43587","record_id":"<urn:uuid:90dafd8c-7765-4460-9030-60fb802e1e94>","cc-path":"CC-MAIN-2014-15/segments/1397609538022.19/warc/CC-MAIN-20140416005218-00293-ip-10-14... |
Curves and Damped harmonic motion 0_o'
April 24th 2013, 08:34 PM #1
Feb 2013
New Zealand
Curves and Damped harmonic motion 0_o'
I have to find an equation/model for the following:
A vibrating spring has damped harmonic motion- the oscillations decrease over time
-The centre of vibration is 0
-Th... | {"url":"http://mathhelpforum.com/algebra/218139-curves-damped-harmonic-motion-0_o.html","timestamp":"2014-04-21T03:10:32Z","content_type":null,"content_length":"42723","record_id":"<urn:uuid:65582a7e-f5d4-4ce3-b4bb-a3e154407337>","cc-path":"CC-MAIN-2014-15/segments/1397609539447.23/warc/CC-MAIN-20140416005219-00224-ip-... |
SurveyUSA - Feinstein V. Emken
In a general election for US Senate today, if the only two candidates on the ballot were Dianne Feinstein and Elizabeth Emken, who would you vote for?
TRACK POINTS 04/03/12 05/31/12 n/a n/a n/a n/a n/a n/a n/a
± 2.2% ... | {"url":"http://www.surveyusa.com/client/PollTrack.aspx?g=396311cd-5d76-4369-88f0-31e553fb58e0","timestamp":"2014-04-20T03:12:05Z","content_type":null,"content_length":"22758","record_id":"<urn:uuid:0b80d7ee-1da7-4c29-b216-6646d2db01e7>","cc-path":"CC-MAIN-2014-15/segments/1398223207985.17/warc/CC-MAIN-20140423032007-00... |
Re: CVS commit: src/games/factor
Source-Changes-D archive [Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Old Index]
Re: CVS commit: src/games/factor
On Sun, May 16, 2010 at 02:10:35PM +0400, Aleksej Saushev wrote:
> > So nothing about algebra stops you factoring negative numbers.
> > However... | {"url":"http://mail-index.netbsd.org/source-changes-d/2010/05/16/msg001990.html","timestamp":"2014-04-24T02:53:57Z","content_type":null,"content_length":"7282","record_id":"<urn:uuid:5a3c2324-3b0e-4d3f-9e64-964fca20e543>","cc-path":"CC-MAIN-2014-15/segments/1398223204388.12/warc/CC-MAIN-20140423032004-00318-ip-10-147-4... |
Pow function
Tamim Ad Dari
Pow function
I am trying to find the nth root of a function.This is my code
#include <iostream>
#include <math.h>
using namespace std;
int main()
double a=625,b=1/2;
double x=pow(a,b);
here its returning x=1. that is though I have made b double, the function is... | {"url":"http://cboard.cprogramming.com/cplusplus-programming/154268-pow-function-printable-thread.html","timestamp":"2014-04-21T00:17:53Z","content_type":null,"content_length":"15171","record_id":"<urn:uuid:ccb4d3f7-a78d-4439-912b-366b078e1a67>","cc-path":"CC-MAIN-2014-15/segments/1398223203841.5/warc/CC-MAIN-201404230... |
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3. What is a polynomial function in standard form with zeroes ... | {"url":"http://openstudy.com/updates/50c8f96de4b09c5571443c2b","timestamp":"2014-04-20T00:47:42Z","content_type":null,"content_length":"65910","record_id":"<urn:uuid:d025a901-de83-4811-9f49-a80dd19a7476>","cc-path":"CC-MAIN-2014-15/segments/1397609537804.4/warc/CC-MAIN-20140416005217-00453-ip-10-147-4-33.ec2.internal.w... |
Fountain Hills Prealgebra Tutors
...I am now an anatomy professor at my Alma mater. My expertise is condensing the information and helping my students understand what it all means and why it is important. I took physiology in
undergraduate school and then again in medical school.
14 Subjects: including prealgebra... | {"url":"http://www.algebrahelp.com/Fountain_Hills_prealgebra_tutors.jsp","timestamp":"2014-04-19T01:58:42Z","content_type":null,"content_length":"25059","record_id":"<urn:uuid:48411147-7fda-4d35-b83b-e19c604c3064>","cc-path":"CC-MAIN-2014-15/segments/1397609535745.0/warc/CC-MAIN-20140416005215-00099-ip-10-147-4-33.ec2.... |
Percent of Increase
6.14: Percent of Increase
Difficulty Level:
Created by: CK-12
Practice Percent of Increase
Have you ever overheard an adult conversation?
Taylor overheard her Aunt Alicia talking with her Uncle about stocks. Aunt Alicia had 150 shares of XYZ stock. She just bought more shares of the same stock and n... | {"url":"http://www.ck12.org/book/CK-12-Middle-School-Math-Concepts---Grade-7/r2/section/6.14/","timestamp":"2014-04-18T22:05:51Z","content_type":null,"content_length":"133167","record_id":"<urn:uuid:a7b3517e-45ca-49a4-9d7d-6bff15b46948>","cc-path":"CC-MAIN-2014-15/segments/1397609535095.9/warc/CC-MAIN-20140416005215-00... |
AJAX Version of Mathematica Coming
532582 story
Posted by
from the this-is-not-mathematics-this-is-theology dept.
"The O'Reilly School of Technology is teaming up with Wolfram Research to provide on-line math courses using an AJAX version of Mathematica. O'Reilly has posted an and interview with Scott Gray, the
dire... | {"url":"http://it.slashdot.org/story/08/02/20/1852219/ajax-version-of-mathematica-coming","timestamp":"2014-04-20T20:22:57Z","content_type":null,"content_length":"191438","record_id":"<urn:uuid:ddb69528-b58e-4489-bac0-c9c3aa60c20b>","cc-path":"CC-MAIN-2014-15/segments/1397609539066.13/warc/CC-MAIN-20140416005219-00149-... |
Area inside a square/closest to the center
June 5th 2008, 08:22 PM #1
Jun 2008
Area inside a square/closest to the center
Region R consists of all points inside the square that are closer to the center of the square than to any of the sides. Find the area of R
Just to verify the length of the sides of the s... | {"url":"http://mathhelpforum.com/calculus/40774-area-inside-square-closest-center.html","timestamp":"2014-04-21T08:21:07Z","content_type":null,"content_length":"38780","record_id":"<urn:uuid:18ab75c5-4369-41ec-887c-b08888faeb0d>","cc-path":"CC-MAIN-2014-15/segments/1397609539665.16/warc/CC-MAIN-20140416005219-00214-ip-... |
Aleph Zero Categorical
Here’s a cool picture I made with Sage and R of class numbers of $\mathbb{Q}(\sqrt{-D})$ where $D$ is squarefree. It consists of the first five thousand such $D$ (click image to enlarge):
The even class numbers are shown in red +-signs and the odd class numbers are shown as blue disks. If you loo... | {"url":"http://blog.jpolak.org/","timestamp":"2014-04-18T20:44:38Z","content_type":null,"content_length":"52981","record_id":"<urn:uuid:d2372b32-6ea1-4246-9abb-7967f5b3ea08>","cc-path":"CC-MAIN-2014-15/segments/1397609535095.9/warc/CC-MAIN-20140416005215-00385-ip-10-147-4-33.ec2.internal.warc.gz"} |
Who Is Euclid and What Did He Do?
Anyone interested in Greek history, ancient cultures, mathematics, physics, and natural sciences might be interested to learn about Euclid and his accomplishments. He is mentioned in nearly every
mathematical textbook, and he is referenced in lots of historical texts and scientific tex... | {"url":"http://biography.yourdictionary.com/articles/who-is-euclid-and-what-did-he-do.html","timestamp":"2014-04-20T10:48:47Z","content_type":null,"content_length":"40318","record_id":"<urn:uuid:4fc9688d-568a-423e-aca7-4acb2bfbd105>","cc-path":"CC-MAIN-2014-15/segments/1398223205375.6/warc/CC-MAIN-20140423032005-00623-... |
proving that is A commutes, then its inverse does as well
If A and B are both invertible nxn matrices and A is invertible, How can I prove thatA^-1 B=BA^-1
Since they're square matrices and A is invertible, we see that \begin{aligned}AB=BA & \implies A^{-1}\left(AB\right)A^{-1}=A^{-1}\left(BA\right)A^{-1}\\ &\implies \... | {"url":"http://mathhelpforum.com/advanced-algebra/112157-proving-commutes-then-its-inverse-does-well.html","timestamp":"2014-04-21T08:17:59Z","content_type":null,"content_length":"33457","record_id":"<urn:uuid:27dd5129-20dc-4d65-b4a8-7005dd16d984>","cc-path":"CC-MAIN-2014-15/segments/1397609539665.16/warc/CC-MAIN-20140... |
An Invitation to Higher Gauge Theory
Posted by John Baez
John Huerta and I are writing an expository paper based on the notes of the course I taught in Corfu last summer:
As with the course, the goal here is to give mathematicians and physicists a little taste of higher gauge theory, just enough to whet their appetite.... | {"url":"http://golem.ph.utexas.edu/category/2010/03/an_invitation_to_higher_gauge.html","timestamp":"2014-04-20T16:31:25Z","content_type":null,"content_length":"49319","record_id":"<urn:uuid:c6cf3ae6-1888-4406-9b8f-be3704a25e8d>","cc-path":"CC-MAIN-2014-15/segments/1397609538824.34/warc/CC-MAIN-20140416005218-00627-ip-... |
identifying vertices of a polytope given as a convex hull of points
up vote 0 down vote favorite
I have a linear programming problem where the polytope is described as a convex hull of an exponential number ($2^d$) of points in d-dimensional space. What could be an approach? Do you first
identify the set of vertices fr... | {"url":"http://mathoverflow.net/questions/127405/identifying-vertices-of-a-polytope-given-as-a-convex-hull-of-points","timestamp":"2014-04-18T13:51:49Z","content_type":null,"content_length":"46984","record_id":"<urn:uuid:ed4d9f74-4fe2-415c-b894-db43981a2c10>","cc-path":"CC-MAIN-2014-15/segments/1397609533689.29/warc/CC... |
Alexander's and Eudemus' Method for Squaring Lunules Compared
• according to Simplicius, Commentary on Aristotle's Physics pp. 55 line 25 - 57 line 29,
• and of Eudemus of Rhodes,
• according to Simplicius, Commentary on Aristotle's Physics pp. 60 line 22 - 67 line 30,
• in their respective discussions of the s... | {"url":"http://web.calstatela.edu/faculty/hmendel/Ancient%20Mathematics/HippocratesOfChios/AlexandEudem/AlexanderEudemusCompared.htm","timestamp":"2014-04-16T11:01:00Z","content_type":null,"content_length":"11079","record_id":"<urn:uuid:16839d3c-b1b7-46e7-bc60-89aa2acf84f2>","cc-path":"CC-MAIN-2014-15/segments/13976095... |
Paul Kelly: Compilers II (advanced)
Lecture notes are available on the web here. (this is Chapter 5 of the Parallel Architectures course, which supercedes the original material here). Note that these may not be fully up to date until
paper copies are actually d istributed.
Tutorial exercises are available on the web he... | {"url":"http://www.doc.ic.ac.uk/~phjk/phjk-CompilersII.html","timestamp":"2014-04-17T09:34:11Z","content_type":null,"content_length":"2384","record_id":"<urn:uuid:1b3c4788-fa0a-4758-adc9-30a30f822bae>","cc-path":"CC-MAIN-2014-15/segments/1397609527423.39/warc/CC-MAIN-20140416005207-00302-ip-10-147-4-33.ec2.internal.war... |
Find Complex Numbers
Date: 12/16/95 at 22:30:56
From: Anonymous
Subject: Algebra (complex numbers)
Find all complex numbers such that
(conjugate z)(z)^(n-1) = 1.
z is a complex number. ^ means "to the power of".
Date: 5/30/96 at 14:59:10
From: Doctor Charles
Subject: Re: Algebra (complex numbers)
Polar form he... | {"url":"http://mathforum.org/library/drmath/view/52233.html","timestamp":"2014-04-16T04:17:19Z","content_type":null,"content_length":"6259","record_id":"<urn:uuid:7e7bfe33-6bdc-449b-80cd-2cf446a5420a>","cc-path":"CC-MAIN-2014-15/segments/1397609530131.27/warc/CC-MAIN-20140416005210-00354-ip-10-147-4-33.ec2.internal.war... |
A. Overview of regression analysis
B. Step-by-step instructions for doing regressions in Excel
C. Interpreting your Excel output
Inferential statistics is all about trying to generalize about a population on the basis of a sample. We have to be very careful about the inferences we make when we do research. How ... | {"url":"http://org.elon.edu/econ/sac/regress.htm","timestamp":"2014-04-19T09:53:03Z","content_type":null,"content_length":"28012","record_id":"<urn:uuid:30d686fb-819d-45e7-8495-b414b0d25351>","cc-path":"CC-MAIN-2014-15/segments/1397609537097.26/warc/CC-MAIN-20140416005217-00612-ip-10-147-4-33.ec2.internal.warc.gz"} |
p-Sylow question
May 30th 2010, 09:45 PM #1
Apr 2010
p-Sylow question
Let K be a normal subgroup of a fintire group G. Let S be a p-Sylow subgroup of G (p a prime divisor of |G|).
Prove that KS/K is a p-Sylow subgroup of G/K.
So we know that K is a subgroup of KS and KS is a subgroup of G, so by the cor... | {"url":"http://mathhelpforum.com/advanced-algebra/147038-p-sylow-question.html","timestamp":"2014-04-20T06:51:38Z","content_type":null,"content_length":"37424","record_id":"<urn:uuid:899daeae-ecf1-41ba-b923-248e595d0130>","cc-path":"CC-MAIN-2014-15/segments/1397609538022.19/warc/CC-MAIN-20140416005218-00016-ip-10-147-4... |
Perpendicular Bisector
6.1: Perpendicular Bisector
Created by: CK-12
This activity is intended to supplement Geometry, Chapter 5, Lesson 2.
Problem 1 – Exploring the Perpendicular Bisector Theorem
Start the Cabri Jr. application by pressing APPS and selecting CabriJr. Open the file PERBIS by pressing $Y=$Open..., and s... | {"url":"http://www.ck12.org/book/Texas-Instruments-Geometry-Student-Edition/r1/section/6.1/","timestamp":"2014-04-19T18:35:36Z","content_type":null,"content_length":"106881","record_id":"<urn:uuid:1bd2fbf5-c12b-496e-8fa7-6773b15b63af>","cc-path":"CC-MAIN-2014-15/segments/1398223206672.15/warc/CC-MAIN-20140423032006-002... |
MathGroup Archive: March 2009 [00972]
[Date Index] [Thread Index] [Author Index]
Re: Bug in D (or Derivative) ( Was: Re: DSolve bug)
• To: mathgroup at smc.vnet.net
• Subject: [mg97941] Re: [mg97919] Bug in D (or Derivative) ( Was: Re: DS... | {"url":"http://forums.wolfram.com/mathgroup/archive/2009/Mar/msg00972.html","timestamp":"2014-04-16T19:17:09Z","content_type":null,"content_length":"27972","record_id":"<urn:uuid:6fb924e8-b964-4ddb-a8cb-659acb93ea7b>","cc-path":"CC-MAIN-2014-15/segments/1398223207046.13/warc/CC-MAIN-20140423032007-00205-ip-10-147-4-33.... |
surjection of localic infinity toposes?
up vote 2 down vote favorite
Is there a simple 'topological' condition to detect whenever a morphism of locales $f : X \rightarrow Y$ induces a surjection of infinity-toposes $f : \mathrm{Sh}_{\infty}(X) \rightarrow \mathrm{Sh}_
{\infty}(Y)$ (i.e. such that $f^*$ is conservative)... | {"url":"https://mathoverflow.net/questions/99616/surjection-of-localic-infinity-toposes","timestamp":"2014-04-18T21:46:43Z","content_type":null,"content_length":"53158","record_id":"<urn:uuid:fbeab5e7-16de-4a67-8936-494f460b5990>","cc-path":"CC-MAIN-2014-15/segments/1397609535095.9/warc/CC-MAIN-20140416005215-00483-ip-... |
This Article
Bibliographic References
Add to:
On the Performance of Synchronized Programs in Distributed Networks with Random Processing Times and Transmission Delays
September 1994 (vol. 5 no. 9)
pp. 939-950
ASCII Text ... | {"url":"http://www.computer.org/csdl/trans/td/1994/09/l0939-abs.html","timestamp":"2014-04-24T17:14:40Z","content_type":null,"content_length":"60125","record_id":"<urn:uuid:09d0aeea-8c34-4ba0-ad87-13b1211bb50a>","cc-path":"CC-MAIN-2014-15/segments/1398223206647.11/warc/CC-MAIN-20140423032006-00162-ip-10-147-4-33.ec2.in... |
Adding and Subtracting Matrices
November 8th 2011, 07:05 PM #1
Nov 2011
Adding and Subtracting Matrices
I've got this problem from my SAT Math level 2 prep book, which I think has the wrong answer.
The question is:
So what I did was subtract the matrix on the right by the left, and then both multiply ... | {"url":"http://mathhelpforum.com/algebra/191502-adding-subtracting-matrices.html","timestamp":"2014-04-19T13:12:11Z","content_type":null,"content_length":"39131","record_id":"<urn:uuid:88263c6d-ff70-4665-90d4-fc240993d155>","cc-path":"CC-MAIN-2014-15/segments/1397609537186.46/warc/CC-MAIN-20140416005217-00055-ip-10-147... |
Nov 28,
2012, 05:27 #1
Have you got a Physics test coming up? Are you preparing a Physics assignment or dealing with calcu... | {"url":"http://forums.macrumors.com/showthread.php?s=81a524e1f0f263d289c236415a21f2c7&p=16397502","timestamp":"2014-04-18T19:01:31Z","content_type":null,"content_length":"80642","record_id":"<urn:uuid:4c1aaa7a-0a2d-48fa-80d2-b5fa7a351041>","cc-path":"CC-MAIN-2014-15/segments/1398223201753.19/warc/CC-MAIN-20140423032001... |
MOPT-04 - identification, part 2
functions and variables:
A function has all the same features a variable does: A function is an entity with an abstraction barrier, and that barrier defines a scope. Every function can be bound to an identifier, and every
function produces a value. The set of all values a function can p... | {"url":"http://www.perlmonks.org/index.pl?node_id=224813","timestamp":"2014-04-19T19:11:02Z","content_type":null,"content_length":"46549","record_id":"<urn:uuid:ae8c39c3-12bb-475a-ab8e-ecb82ab86868>","cc-path":"CC-MAIN-2014-15/segments/1397609537308.32/warc/CC-MAIN-20140416005217-00118-ip-10-147-4-33.ec2.internal.warc.... |
How to simplify this combinatorial expression?
Take the 2-minute tour ×
MathOverflow is a question and answer site for professional mathematicians. It's 100% free, no registration required.
Can we simplify the expression above?
This type of expression is very well known. See Concrete Mathematics by Graham, Knuth, ... | {"url":"http://mathoverflow.net/questions/40803/how-to-simplify-this-combinatorial-expression","timestamp":"2014-04-16T16:53:33Z","content_type":null,"content_length":"40998","record_id":"<urn:uuid:4bfe808f-e159-40e0-b9b5-eb1e44819ddd>","cc-path":"CC-MAIN-2014-15/segments/1397609524259.30/warc/CC-MAIN-20140416005204-00... |
Coxeter group
From Encyclopedia of Mathematics
A group with a distinguished system of generators
1) Every group generated by two elements of order
Figure: c026980a
2) The symmetric group
Figure: c026980b
3) The group
its graph has the form
Figure: c026980c
The group
The notion of a Coxeter group arose in the theory of ... | {"url":"http://www.encyclopediaofmath.org/index.php/Coxeter_group","timestamp":"2014-04-19T17:02:10Z","content_type":null,"content_length":"36266","record_id":"<urn:uuid:8615905b-c0d2-487d-9b64-4f4048311155>","cc-path":"CC-MAIN-2014-15/segments/1398223203235.2/warc/CC-MAIN-20140423032003-00187-ip-10-147-4-33.ec2.intern... |
Interview Questions
Recent Interview Questions
Objective: Write a function to find all the combinations of three numbers that sum to zero
Sample input:
[2, 3, 1, -2, -1, 0, 2, -3, 0]
Sample output:
2, -2, 0
1, -1, 0
3, -2, -1
3, 0, -3
3, 0, -3
write a function that has an int as... | {"url":"http://www.careercup.com/page","timestamp":"2014-04-20T03:11:31Z","content_type":null,"content_length":"199849","record_id":"<urn:uuid:2acba790-0b43-4647-9bec-122c856cdcda>","cc-path":"CC-MAIN-2014-15/segments/1398223205137.4/warc/CC-MAIN-20140423032005-00131-ip-10-147-4-33.ec2.internal.warc.gz"} |
Similarity Shortcuts - Concept
There are four triangle congruence shortcuts: SSS, SAS, ASA, and AAS. We have triangle similarity if (1) two pairs of angles are congruent (AA) (2) two pairs of sides are proportional and the
included angles are congruent (SAS), or (3) if three pairs of sides are proportional (SSS). Notic... | {"url":"https://www.brightstorm.com/math/geometry/similarity/similarity-shortcuts/","timestamp":"2014-04-17T21:26:42Z","content_type":null,"content_length":"63879","record_id":"<urn:uuid:b1337025-4bc7-424a-b52e-fbc204727402>","cc-path":"CC-MAIN-2014-15/segments/1398223206120.9/warc/CC-MAIN-20140423032006-00514-ip-10-14... |
Introduction to Stata
These web pages assume that you are using Stata Version 13 for Windows.
If you would like to run the example commands, you need to copy the example Stata data files to your local PC. Click download sample data for instructions. If you're using a computer at the Carolina
Population Center, the data... | {"url":"http://www.cpc.unc.edu/research/tools/data_analysis/statatutorial","timestamp":"2014-04-20T13:40:16Z","content_type":null,"content_length":"53527","record_id":"<urn:uuid:29e730c6-fbd3-4933-a727-c36f5b6d85f3>","cc-path":"CC-MAIN-2014-15/segments/1397609538787.31/warc/CC-MAIN-20140416005218-00434-ip-10-147-4-33.e... |
FUTUR. Website for the scientific production of UPC researchers.
Balbuena Martinez, Maria Camino Teofila
Total activity: 265
Research group
Contact details
Scopus Author ID
Scientific and technological production
1 to 50 of 265 results
• On the connectivity and restricted edge-connectivity of 3-arc graphs
Discret... | {"url":"http://futur.upc.edu/177812","timestamp":"2014-04-24T06:24:44Z","content_type":null,"content_length":"402827","record_id":"<urn:uuid:a43f257f-3536-4875-ad20-1c5ff2aba4e7>","cc-path":"CC-MAIN-2014-15/segments/1398223205375.6/warc/CC-MAIN-20140423032005-00124-ip-10-147-4-33.ec2.internal.warc.gz"} |
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Please help Please Part 1: Solve the inequality 2(x + 6) great... | {"url":"http://openstudy.com/updates/4f566e9be4b0862cfd075f08","timestamp":"2014-04-21T07:53:21Z","content_type":null,"content_length":"37541","record_id":"<urn:uuid:1b6a0f19-90b9-43ca-8423-829638f67457>","cc-path":"CC-MAIN-2014-15/segments/1398223204388.12/warc/CC-MAIN-20140423032004-00232-ip-10-147-4-33.ec2.internal.... |
On Determinants of Laplacians on Riemann Surfaces
up vote 17 down vote favorite
History of the Formula: In their famous paper "On Determinants of Laplacians on Riemann Surfaces" (1986), D'Hoker and Phong computed the determinant of the Laplacian $\Delta_n^+$ on the space $T^n$
of spinor/tensor fields on the compact Rie... | {"url":"http://mathoverflow.net/questions/125386/on-determinants-of-laplacians-on-riemann-surfaces","timestamp":"2014-04-18T03:02:26Z","content_type":null,"content_length":"56795","record_id":"<urn:uuid:4d4f6415-7ead-4fb9-9a27-13edd04ade0a>","cc-path":"CC-MAIN-2014-15/segments/1397609532480.36/warc/CC-MAIN-201404160052... |
Columbine Valley, CO Prealgebra Tutor
Find a Columbine Valley, CO Prealgebra Tutor
...In addition to the zip code listed, I am frequently in the Littleton and downtown Denver areas. I am also willing to commute to Boulder. Thank you for reading my ad!
13 Subjects: including prealgebra, calculus, statistics, geome... | {"url":"http://www.purplemath.com/Columbine_Valley_CO_prealgebra_tutors.php","timestamp":"2014-04-16T13:22:21Z","content_type":null,"content_length":"24611","record_id":"<urn:uuid:dff0d859-5b46-404a-803e-ee8e10d55c47>","cc-path":"CC-MAIN-2014-15/segments/1397609523429.20/warc/CC-MAIN-20140416005203-00469-ip-10-147-4-33... |
[plt-scheme] Re: Why "lambda"?
From: wooks (wookiz at hotmail.com)
Date: Wed May 27 03:52:38 EDT 2009
On May 27, 2:25 am, Neil Toronto <ntoro... at cs.byu.edu> wrote:
> From an information-theoretic standpoint, by memorizing a simple
> mapping from symbols to names, you'll be able to hold more knowledge in
> your aver... | {"url":"http://lists.racket-lang.org/users/archive/2009-May/033334.html","timestamp":"2014-04-19T08:09:51Z","content_type":null,"content_length":"8334","record_id":"<urn:uuid:15fd9f34-adf7-4c84-a7e8-acc8ffb28ded>","cc-path":"CC-MAIN-2014-15/segments/1397609536300.49/warc/CC-MAIN-20140416005216-00215-ip-10-147-4-33.ec2.... |
Lebesgue measure and Hausdorff dimension
December 2nd 2011, 10:05 AM #1
Junior Member
Sep 2011
Lebesgue measure and Hausdorff dimension
Let $E\subset\mathbb{R}^{n}$ be a set that is not measurable with respect to the n-dimensional Lebesgue measure. Show that $E$ has Hausdorff dimension n.
Re: Lebesgue measure a... | {"url":"http://mathhelpforum.com/differential-geometry/193250-lebesgue-measure-hausdorff-dimension.html","timestamp":"2014-04-16T06:22:40Z","content_type":null,"content_length":"34125","record_id":"<urn:uuid:44ef9e41-11b3-4ea1-8a76-5f5b51897f8f>","cc-path":"CC-MAIN-2014-15/segments/1397609521512.15/warc/CC-MAIN-2014041... |
spiral that grows by 1.618
07-09-2002, 11:57 AM #1
Junior Member
Join Date
Jul 2002
I need some actionscript that will make a "golden section" spiral. I'd love it if I could have the spiral drawn rather than just appear. I'm relatively new to Flash, please - any help is greatly
reference link follows:
I... | {"url":"http://board.flashkit.com/board/showthread.php?338743.html","timestamp":"2014-04-17T18:33:25Z","content_type":null,"content_length":"115717","record_id":"<urn:uuid:cc755927-427d-4fe4-a943-0509fb8c4d3a>","cc-path":"CC-MAIN-2014-15/segments/1398223206770.7/warc/CC-MAIN-20140423032006-00275-ip-10-147-4-33.ec2.inte... |
Posts from October 2009 on tcs math - some mathematics of theoretical computer science
Bloomington summer school recap
Filed under: Math — Tags: Approximation Algorithms, Heisenberg group, Rigidity, semi-definite programming, unique games conjecture — James Lee @ 4:27 am
A couple months ago, at Indiana University, Davi... | {"url":"http://tcsmath.wordpress.com/2009/10/","timestamp":"2014-04-18T05:30:39Z","content_type":null,"content_length":"49449","record_id":"<urn:uuid:3c2af5bb-f145-4e94-b362-84f9112dd54f>","cc-path":"CC-MAIN-2014-15/segments/1397609532573.41/warc/CC-MAIN-20140416005212-00422-ip-10-147-4-33.ec2.internal.warc.gz"} |
Triangle Angle Sum - Concept
The sum of the three angles in any triangle sum to 180 degrees. The importance of this fact in Geometry cannot be emphasized enough. The triangle angle sum theorem is used in almost every missing
angle problem, in the exterior angle theorem, and in the polygon angle sum formula.
One of the ... | {"url":"https://www.brightstorm.com/math/geometry/triangles/triangle-angle-sum/","timestamp":"2014-04-17T04:12:28Z","content_type":null,"content_length":"65630","record_id":"<urn:uuid:69b8228f-f923-4ee1-af81-916b55b5a63e>","cc-path":"CC-MAIN-2014-15/segments/1397609533689.29/warc/CC-MAIN-20140416005213-00349-ip-10-147-... |
cycle decomposition 5
Show that a k-cycle has order k. Please show steps. Thanks!
Let $f=(0,1,2,...,k-1)$ be the cycle. Then $f(n) = n$ if $not \in \{0,1,2,...,k-1\}$ and $f(m) = m+1(\bmod k)$ if $m\in \{0,1,2,...,k-1\}$. It is seems from this that $f^j (n) = n$ and $f^j(m) = m +
j(\bmod k)$. For $f^j$ to be the identi... | {"url":"http://mathhelpforum.com/advanced-algebra/85421-cycle-decomposition-5-a.html","timestamp":"2014-04-16T10:18:18Z","content_type":null,"content_length":"34556","record_id":"<urn:uuid:2e017d7d-747c-4f4c-ac7e-4e28a41c9448>","cc-path":"CC-MAIN-2014-15/segments/1397609523265.25/warc/CC-MAIN-20140416005203-00647-ip-10... |
Nonantum Geometry Tutor
Find a Nonantum Geometry Tutor
...My primary area of specialty is math - I majored in Applied Mathematics at Harvard, I scored a 5 on the Calculus BC Advanced Placement Exam, and a perfect score on the SAT II Mathematics test.
I also taught everything from pre-algebra through pre-calculus wh... | {"url":"http://www.purplemath.com/Nonantum_Geometry_tutors.php","timestamp":"2014-04-20T04:20:09Z","content_type":null,"content_length":"23896","record_id":"<urn:uuid:c52a6792-27da-4d25-9c50-36b9937daf34>","cc-path":"CC-MAIN-2014-15/segments/1397609537864.21/warc/CC-MAIN-20140416005217-00287-ip-10-147-4-33.ec2.internal... |