content stringlengths 86 994k | meta stringlengths 288 619 |
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Wrapping ArrayPlot or MatrixPlot around a circle
I read in documentation the
SectorChart is a generalization of PieChart
I am not sure what is meant exactly, but I feel it could help me with the following task.
Imagine a rectangular matrix with real va... | {"url":"http://community.wolfram.com/groups/-/m/t/128068?p_p_auth=LBnsgEe4","timestamp":"2014-04-20T13:41:18Z","content_type":null,"content_length":"86750","record_id":"<urn:uuid:885f9907-4ff6-47e3-9758-1c47ea45f9ce>","cc-path":"CC-MAIN-2014-15/segments/1397609538787.31/warc/CC-MAIN-20140416005218-00335-ip-10-147-4-33.... |
Rolling a random walk on a sphere
up vote 35 down vote favorite
A ball rolls down an inclined plane, encountering horizontal obstacles, at which it rolls left/right with equal probability. There are regularly spaced staggered gaps that let the ball roll down to
the next, lower obstacle. The pattern resembles a binary t... | {"url":"http://mathoverflow.net/questions/63574/rolling-a-random-walk-on-a-sphere/63581","timestamp":"2014-04-19T12:24:44Z","content_type":null,"content_length":"62852","record_id":"<urn:uuid:a74c9f03-bc5d-4f9d-8dda-25a7d5860970>","cc-path":"CC-MAIN-2014-15/segments/1398223205137.4/warc/CC-MAIN-20140423032005-00162-ip-... |
Imaginary Numbers
November 19th 2008, 03:07 PM
Imaginary Numbers
Suppose that x and y are real numbers such that (2+3x)-(5-3y)i = 11+7i.
Find the values of x and y.
Thank you for any help!
November 19th 2008, 04:09 PM
How about equating the REAL part of the left side of equation to the REAL part of the ... | {"url":"http://mathhelpforum.com/pre-calculus/60525-imaginary-numbers-print.html","timestamp":"2014-04-19T23:03:56Z","content_type":null,"content_length":"4808","record_id":"<urn:uuid:c7b3ef9c-1748-4252-9fce-294b69cc7372>","cc-path":"CC-MAIN-2014-15/segments/1397609537754.12/warc/CC-MAIN-20140416005217-00568-ip-10-147-... |
Auburndale, MA Algebra 1 Tutor
Find an Auburndale, MA Algebra 1 Tutor
...The GRE is a great test to take for graduate school. If English isn't your first language, you may need extra help in preparation. Most questions have a language component that can trip you
55 Subjects: including algebra 1, English, reading, E... | {"url":"http://www.purplemath.com/auburndale_ma_algebra_1_tutors.php","timestamp":"2014-04-17T01:36:33Z","content_type":null,"content_length":"24013","record_id":"<urn:uuid:b90e739d-7dca-4953-b733-5202d30f1bca>","cc-path":"CC-MAIN-2014-15/segments/1398223207046.13/warc/CC-MAIN-20140423032007-00257-ip-10-147-4-33.ec2.in... |
Slope problems,
November 22nd 2010, 09:31 AM #1
Ok so im a junior in high school and last year i failed geometry i don't want to be on the same path this year ETC...
Im doing slope stuff and i got different questions about this.
i understand that the equation is Y=Mx(slope)+B(Y,Intercept)
First question... | {"url":"http://mathhelpforum.com/geometry/164081-slope-problems.html","timestamp":"2014-04-16T19:33:39Z","content_type":null,"content_length":"36617","record_id":"<urn:uuid:1ad8f0a4-6421-4454-bb91-c686e25f25dd>","cc-path":"CC-MAIN-2014-15/segments/1397609526252.40/warc/CC-MAIN-20140416005206-00184-ip-10-147-4-33.ec2.in... |
We Use Algebra Everyday?
We use algebra everyday? That is the million dollar question. It is usually preceded with, "Why do I have to learn this stuff, I am never going to use it?" You are far from correct. Algebra is used
everyday, all the time. It is used in problem solving situations when you are trying to determine... | {"url":"http://www.mathworksheetscenter.com/mathtips/everydayalgebra.html","timestamp":"2014-04-20T10:49:46Z","content_type":null,"content_length":"10465","record_id":"<urn:uuid:72b0b5ca-c53c-40a3-afe0-b43e76ff5b8d>","cc-path":"CC-MAIN-2014-15/segments/1397609538423.10/warc/CC-MAIN-20140416005218-00583-ip-10-147-4-33.e... |
East Palo Alto, CA Geometry Tutor
Find an East Palo Alto, CA Geometry Tutor
...I think I have more appreciation now for the beauty and power of calculus than I did when I first learned it! It's so rewarding to explain these concepts to students, and watch their
excitement when things all start to make sense. Calcul... | {"url":"http://www.purplemath.com/East_Palo_Alto_CA_geometry_tutors.php","timestamp":"2014-04-20T02:19:28Z","content_type":null,"content_length":"24285","record_id":"<urn:uuid:acab7856-46cb-4bea-bbd6-7beeb590152e>","cc-path":"CC-MAIN-2014-15/segments/1397609537804.4/warc/CC-MAIN-20140416005217-00227-ip-10-147-4-33.ec2.... |
Determination of Molecular Diameter by
ISRN Physical Chemistry
Volume 2012 (2012), Article ID 521827, 5 pages
Research Article
Determination of Molecular Diameter by PVT
Department of Chemistry, Payame Noor University, P.O. Box 19395-3697 Tehran, Iran
Received 3 December 2011; Accepted 3 January 2012
Academic Editors:... | {"url":"http://www.hindawi.com/journals/isrn/2012/521827/","timestamp":"2014-04-17T10:08:04Z","content_type":null,"content_length":"126694","record_id":"<urn:uuid:bee6f6a6-eae3-4fc2-9885-b9d742c99d38>","cc-path":"CC-MAIN-2014-15/segments/1398223211700.16/warc/CC-MAIN-20140423032011-00268-ip-10-147-4-33.ec2.internal.war... |
Summary: PROCEEDINGS OF THE
Volume 00, Number 0, Xxxx XXXX, Pages 000{000
S 0002-9939(XX)0000-0
Abstract. We prove that any permutation p of the plane can be obtained as
a composition of a xed number (209) of simple transformations of the form
(x; y) ! (x; y + f(x)) and (x; y) ! (x + g(y); y), where f and g are arbitra... | {"url":"http://www.osti.gov/eprints/topicpages/documents/record/191/0192287.html","timestamp":"2014-04-20T00:04:57Z","content_type":null,"content_length":"7948","record_id":"<urn:uuid:80656d68-0405-42ce-a59f-1d8747b5c5eb>","cc-path":"CC-MAIN-2014-15/segments/1397609537754.12/warc/CC-MAIN-20140416005217-00311-ip-10-147-... |
North Brentwood, MD Prealgebra Tutor
Find a North Brentwood, MD Prealgebra Tutor
...I am certified to teach all subjects in elementary school and mathematics at the middle school level. Throughout the past few years as a middle school math teacher, I have helped many students
strengthen their basic skills to allow ... | {"url":"http://www.purplemath.com/North_Brentwood_MD_Prealgebra_tutors.php","timestamp":"2014-04-17T01:25:47Z","content_type":null,"content_length":"24756","record_id":"<urn:uuid:c3b9b8fd-060c-48e2-bdd8-c53c0a21b83f>","cc-path":"CC-MAIN-2014-15/segments/1397609526102.3/warc/CC-MAIN-20140416005206-00314-ip-10-147-4-33.e... |
Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
1. Division T reported income from operations of $875,000 and total service department charges of $575,000. Therefore:
a. the gross profit margin was $300,000
b. consolidated net income was $300,000
... | {"url":"http://professorzapalski.tripod.com/courses/ACC2052/acc2052t4.htm","timestamp":"2014-04-17T15:46:07Z","content_type":null,"content_length":"185088","record_id":"<urn:uuid:fd406544-984a-474f-a5ba-598eab6dc91b>","cc-path":"CC-MAIN-2014-15/segments/1397609530136.5/warc/CC-MAIN-20140416005210-00622-ip-10-147-4-33.e... |
Math Forum Discussions
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Topic: Mapping a sphere to a plane
Replies: 8 Last Post: Mar 17, 2006 9:12 AM
Messages: [ Previous | Ne... | {"url":"http://mathforum.org/kb/thread.jspa?threadID=1346609&messageID=4534989","timestamp":"2014-04-17T07:18:42Z","content_type":null,"content_length":"27150","record_id":"<urn:uuid:4dc9b8bf-b5a6-42fc-b30e-8f8ce6732c24>","cc-path":"CC-MAIN-2014-15/segments/1398223206120.9/warc/CC-MAIN-20140423032006-00290-ip-10-147-4-... |
Answers for Chapter 4 - GNU libavl 2.0.2
1. This construct makes <bst.h 24> idempotent (see idempotent), that is, including it many times has the same effect as including it once. This is important because some C constructs, such as type
definitions with typedef, are erroneous if included in a program multiple times.
O... | {"url":"http://adtinfo.org/libavl.html/Answers-for-Chapter-4.html","timestamp":"2014-04-19T22:30:40Z","content_type":null,"content_length":"118257","record_id":"<urn:uuid:b26352e3-8d3d-4385-9370-2c4d99a1752f>","cc-path":"CC-MAIN-2014-15/segments/1397609537754.12/warc/CC-MAIN-20140416005217-00044-ip-10-147-4-33.ec2.inte... |
Estimating Jones polynomials is a complete problem for one clean qubit, http://arxiv.org/abs/0707.2831
Download Links
by Peter W. Shor , Stephen P. Jordan
author = {Peter W. Shor and Stephen P. Jordan},
title = {Estimating Jones polynomials is a complete problem for one clean qubit, http://arxiv.org/abs/0707.2831},
yea... | {"url":"http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.245.8720","timestamp":"2014-04-16T15:11:18Z","content_type":null,"content_length":"29189","record_id":"<urn:uuid:6c0aaa63-70a3-426f-93d8-d74c7925b5ee>","cc-path":"CC-MAIN-2014-15/segments/1397609523429.20/warc/CC-MAIN-20140416005203-00183-ip-10-147-4-33.ec... |
Let a generic particle P be characterized by some repetitive chain of events noted as
ΞΆ z z T (C)
1 u u 96
2 d d 1,906
3 e e -57
4 g g 1,398
5 m m 11
6 a a -122
7 t t 91
8 b b 0
9 s s 33
10 c c 100
$\Psi ^{\sf{P}} = \left( \sf{\Omega}_{1} , \sf{\Omega}_{2} , \sf{\Omega}_{3} \ \ldots \ \right)$
wher... | {"url":"http://wikimechanics.org/temperature","timestamp":"2014-04-17T01:25:51Z","content_type":null,"content_length":"28334","record_id":"<urn:uuid:0fa7a18a-12de-4731-ba57-a05880bf9981>","cc-path":"CC-MAIN-2014-15/segments/1397609526102.3/warc/CC-MAIN-20140416005206-00169-ip-10-147-4-33.ec2.internal.warc.gz"} |
How Do You Begin the School Year?
I put a call out to high school math teachers to share what their first day of school activities are. Flat out copied the idea from @jreulbach and the amazing group of middle school math tweeps. So
here's the list - check them out! Feel free to steal ideas, it's all about getting your ... | {"url":"http://anotherteacherblog.blogspot.com/2012/08/how-do-you-begin-school-year.html","timestamp":"2014-04-21T07:58:01Z","content_type":null,"content_length":"81354","record_id":"<urn:uuid:bb15cba3-1e61-46ac-a6e7-fd3fb3b3470f>","cc-path":"CC-MAIN-2014-15/segments/1398223207046.13/warc/CC-MAIN-20140423032007-00319-i... |
Finding the Difference of the Cubes of Two Numbers
Date: 9/29/95 at 21:57:3
From: Anonymous
Subject: Solve for x^3 - y^3
Here's the problem :
The difference of two numbers is 1.
The product of the two numbers is also 1.
What is the difference of the cubes of the numbers?
Date: 9/30/95 at 1:52:37
From: Doctor Andrew
Sub... | {"url":"http://mathforum.org/library/drmath/view/53341.html","timestamp":"2014-04-19T15:40:36Z","content_type":null,"content_length":"6928","record_id":"<urn:uuid:3713a8e7-c3ca-4734-9b2e-1479d99d97af>","cc-path":"CC-MAIN-2014-15/segments/1397609537271.8/warc/CC-MAIN-20140416005217-00229-ip-10-147-4-33.ec2.internal.warc... |
Algèbre de processus et synchronisations
Results 1 - 10 of 41
, 1991
"... We present anoverview and synthesis of existing results about process algebras for the speci cation and analysis of timed systems. The motivation is double: present anoverview of some relevant
and representative approaches and suggest a unifying ... | {"url":"http://citeseerx.ist.psu.edu/showciting?cid=181058","timestamp":"2014-04-16T21:13:06Z","content_type":null,"content_length":"37429","record_id":"<urn:uuid:663d3282-bd21-45d0-a956-3bae0ab351cb>","cc-path":"CC-MAIN-2014-15/segments/1397609524644.38/warc/CC-MAIN-20140416005204-00408-ip-10-147-4-33.ec2.internal.war... |
Mc Lean, VA SAT Math Tutor
Find a Mc Lean, VA SAT Math Tutor
...My tutoring philosophy: no one learns anything well if I just tell them the answer. Instead, using diagrams and pictures, I like to ask many questions, helping students figure things out in
their own minds. This leads to deep, lasting knowledge, and mo... | {"url":"http://www.purplemath.com/mc_lean_va_sat_math_tutors.php","timestamp":"2014-04-20T21:16:59Z","content_type":null,"content_length":"24041","record_id":"<urn:uuid:b6ef1c8d-857f-460a-9d92-ba6427e33814>","cc-path":"CC-MAIN-2014-15/segments/1398223205137.4/warc/CC-MAIN-20140423032005-00241-ip-10-147-4-33.ec2.interna... |
search results
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1. CMB Online first
A short note on short pants
It is a theorem of Bers that any closed hyperbolic surface admits a pants decomposition consisting of curves of bounded length where the bound only depends on the topology of the surface. The
question of ... | {"url":"http://cms.math.ca/cmb/kw/geodesic","timestamp":"2014-04-17T18:36:39Z","content_type":null,"content_length":"33170","record_id":"<urn:uuid:8086d7b9-c3a3-4daa-823f-454cef837d90>","cc-path":"CC-MAIN-2014-15/segments/1397609530895.48/warc/CC-MAIN-20140416005210-00430-ip-10-147-4-33.ec2.internal.warc.gz"} |
East Northport Math Tutor
Find an East Northport Math Tutor
My name is Anthony, and my math tutoring career goes all the way back to my high school days, when I tutored middle schoolers with my National Honor Society program in Lindenhurst. During my years
studying applied math in college, I continued this practice... | {"url":"http://www.purplemath.com/East_Northport_Math_tutors.php","timestamp":"2014-04-16T19:19:32Z","content_type":null,"content_length":"23963","record_id":"<urn:uuid:1cda3474-1708-42e9-b169-a7b996447096>","cc-path":"CC-MAIN-2014-15/segments/1398223205137.4/warc/CC-MAIN-20140423032005-00459-ip-10-147-4-33.ec2.interna... |
Identify One More Surface
February 22nd 2007, 09:14 PM #1
Sep 2006
Identify One More Surface
This one looks tricky;
Identify the following parametric surface:
z = sin(y)
It looks tricky since its so simple...or at least appears that way to me.
It is a surface in the form if a sine wave where the... | {"url":"http://mathhelpforum.com/pre-calculus/11876-identify-one-more-surface.html","timestamp":"2014-04-17T19:59:34Z","content_type":null,"content_length":"32243","record_id":"<urn:uuid:ae04ae57-327e-41b0-b693-ebcbfa2bbc19>","cc-path":"CC-MAIN-2014-15/segments/1397609530895.48/warc/CC-MAIN-20140416005210-00056-ip-10-1... |
Midi Delta Time Ticks to Seconds
One of the main problems with parsing midi files, is the amount of bad documentation people have put on their websites for converting delta time ticks into seconds or milliseconds.
Eventually I got ahold of the Midi Standard 1.0 which helped me solve this riddle for when calculating it... | {"url":"http://www.lastrayofhope.co.uk/2009/12/23/midi-delta-time-ticks-to-seconds/","timestamp":"2014-04-23T22:36:25Z","content_type":null,"content_length":"37856","record_id":"<urn:uuid:7b8db830-4b11-46ae-a78e-c0c40ca99d97>","cc-path":"CC-MAIN-2014-15/segments/1398223203841.5/warc/CC-MAIN-20140423032003-00578-ip-10-1... |
Mersenne prime
January 17th 2009, 01:16 PM
Mersenne prime
we have that 2^n \equiv 1 mod (2^n-1) therefore the residue class 2 has order n mod 2^n-1. I am intrested in finding a p(prime) such that 2 has order n in where p is prime. In case 2^n-1 is prime
then I can apply the above argument and it is trivial to f... | {"url":"http://mathhelpforum.com/number-theory/68646-mersenne-prime-print.html","timestamp":"2014-04-19T11:43:07Z","content_type":null,"content_length":"3493","record_id":"<urn:uuid:486b0dd4-66fa-4958-bd06-e29424e29563>","cc-path":"CC-MAIN-2014-15/segments/1397609537097.26/warc/CC-MAIN-20140416005217-00044-ip-10-147-4-... |
Phd student required to answer some q's
July 10th 2012, 01:15 AM #1
Jul 2012
Phd student required to answer some q's
Phd in stats required to answer some questions.
I'm willing to pay per question. It should take you about 2 hours, we can negotiate a price.
Follow Math Help Forum on Facebook and Google+ | {"url":"http://mathhelpforum.com/advanced-statistics/200817-phd-student-required-answer-some-q-s.html","timestamp":"2014-04-18T03:53:45Z","content_type":null,"content_length":"29139","record_id":"<urn:uuid:e5fedf7e-a672-4451-b07c-9f2c0e97ff49>","cc-path":"CC-MAIN-2014-15/segments/1397609532480.36/warc/CC-MAIN-201404160... |
Vectro: Haskell library for "statically typed linear algebra"
The source is here. This is work in progress. It is an extension of GSLHaskell, adding some performance improvements and an interface which guarantees operand conformability through the type system.
(GSLHaskell is not needed to use Vectro, a modified version... | {"url":"http://ofb.net/~frederik/vectro/","timestamp":"2014-04-21T02:00:29Z","content_type":null,"content_length":"2007","record_id":"<urn:uuid:03237cc4-cd54-44f0-8c2e-37e85c791d34>","cc-path":"CC-MAIN-2014-15/segments/1398223211700.16/warc/CC-MAIN-20140423032011-00453-ip-10-147-4-33.ec2.internal.warc.gz"} |
Number of views: 4337 Article added: 2 February 2011 Article last modified: 10 February 2011 © Copyright 2010-2014 Back to top
Welcome to the Thermopedia A-to-Z Index!
This Index is organized alphabetically by subject areas and key words. Click on an item to the left in order to see the information associated with that... | {"url":"http://www.thermopedia.com/content/1219/","timestamp":"2014-04-17T18:47:54Z","content_type":null,"content_length":"436458","record_id":"<urn:uuid:6d8234e0-23fd-4367-bc36-29b8bf877cf0>","cc-path":"CC-MAIN-2014-15/segments/1397609530895.48/warc/CC-MAIN-20140416005210-00416-ip-10-147-4-33.ec2.internal.warc.gz"} |
FOM: Goedel and the rejection of intuitionism
Charles Parsons parsons2 at fas.harvard.edu
Tue Mar 10 13:46:09 EST 1998
>I don't know about *any* aspect; but Goedel did reject something that he
>believed to be a presupposition of intuitionistic logic, and that is the
>absolute notion of proof. (See his unpublished paper... | {"url":"http://www.cs.nyu.edu/pipermail/fom/1998-March/001383.html","timestamp":"2014-04-20T13:23:22Z","content_type":null,"content_length":"5226","record_id":"<urn:uuid:ae5957e6-01fa-4464-89bc-eaec5a0224ea>","cc-path":"CC-MAIN-2014-15/segments/1397609538787.31/warc/CC-MAIN-20140416005218-00356-ip-10-147-4-33.ec2.inter... |
cubic yards to tons - OnlineConversion Forums
Re: cubic yards to tons
Hi, easiest to convert cubic yards to cubic meters first, as g/cm^3 is the same as kg/m^3.
583cubic yards = 446m^3. The weight of 446 cubic meters of material of density 0.7 is 446 x 0.7 = 312 kg.
0.7 would be a very low density for any type of sand.... | {"url":"http://forum.onlineconversion.com/showthread.php?t=549","timestamp":"2014-04-21T07:56:55Z","content_type":null,"content_length":"63204","record_id":"<urn:uuid:63612464-e263-4558-9c53-465e2bdd6b22>","cc-path":"CC-MAIN-2014-15/segments/1398223207046.13/warc/CC-MAIN-20140423032007-00000-ip-10-147-4-33.ec2.internal... |
Graduate Study
The Physics Department offers Ph.D. and M.S. degrees. For the M.S. there is both a non-thesis and thesis option. Teaching assistantships are offered to beginning graduate students. Stipends usually
include summer support if the student wishes. Usually as students begin research work for their dissertatio... | {"url":"http://www.auburn.edu/academic/cosam/departments/physics/grad/index.htm","timestamp":"2014-04-16T20:22:11Z","content_type":null,"content_length":"14533","record_id":"<urn:uuid:f2da7929-e793-43ce-831a-441039e2e3b5>","cc-path":"CC-MAIN-2014-15/segments/1397609524644.38/warc/CC-MAIN-20140416005204-00066-ip-10-147-... |
Is 196 a Lychrel Number? | Guest Blog, Scientific American Blog Network
Mathematical revelation is often manifested in the emergence of imagination inspired by simple truths. From cups of coffee and the clacking of chalk, generalizations leap from eraser-smudged boards
into the fabric of physical reality. The legend... | {"url":"http://blogs.scientificamerican.com/guest-blog/2013/10/01/is-196-a-lychrel-number/","timestamp":"2014-04-20T08:41:51Z","content_type":null,"content_length":"94878","record_id":"<urn:uuid:36be0a3f-5415-4325-bbd6-ab9a8a9278b1>","cc-path":"CC-MAIN-2014-15/segments/1398223206118.10/warc/CC-MAIN-20140423032006-00540... |
Finding the square root modulo n, when the factors of n are known
up vote 1 down vote favorite
Last month, I asked whether there is an efficient algorithm for finding the square root modulo a prime power here: Is there an efficient algorithm for finding a square root modulo a prime power?
Now, let's say I am given a po... | {"url":"http://mathoverflow.net/questions/54936/finding-the-square-root-modulo-n-when-the-factors-of-n-are-known","timestamp":"2014-04-19T05:07:08Z","content_type":null,"content_length":"58582","record_id":"<urn:uuid:674e028d-68d4-4c88-a94c-49c07fa453eb>","cc-path":"CC-MAIN-2014-15/segments/1397609535775.35/warc/CC-MAI... |
Circle Graph?
August 20th 2010, 08:27 AM #1
Junior Member
Jul 2010
Circle Graph?
Circles, when graphed on the coordinate plane, have an equation of x2 + y2 = r2 where r is the radius (standard form) when the center of the circle is the origin. When the center of the circle is
(h, k) and the radius is of... | {"url":"http://mathhelpforum.com/algebra/154072-circle-graph.html","timestamp":"2014-04-19T17:02:23Z","content_type":null,"content_length":"41412","record_id":"<urn:uuid:4ec0a9ed-7677-4971-9a1d-f01d3fa56e77>","cc-path":"CC-MAIN-2014-15/segments/1397609537308.32/warc/CC-MAIN-20140416005217-00538-ip-10-147-4-33.ec2.inter... |
Post a reply
"also (i, -2i) and (-i, 2i), whatever these complex thingys mean, I don't remember."
Every nth degree equation has n solutions. Some solutions may be double roots (i.e. (x-1)(x-1) = 0). The graph may only pass through the x-axis (where y = 0, which would be a solutions) less than n
times. When this occurs,... | {"url":"http://www.mathisfunforum.com/post.php?tid=2231&qid=20741","timestamp":"2014-04-18T18:58:25Z","content_type":null,"content_length":"16949","record_id":"<urn:uuid:f2b48aa8-35d4-45d3-ac72-6f2a862eb69e>","cc-path":"CC-MAIN-2014-15/segments/1397609535095.7/warc/CC-MAIN-20140416005215-00080-ip-10-147-4-33.ec2.intern... |
Formulas for Oscillations
From the calculus, we can solve -kx = ma
(this is a differential equation) -kx = m d2x/dt2
to get: x = A sin(wt + qo) where w = [k/m]1/2.
This should appear reasonable: the sine function oscillates (goes up and down in value) just like the mass oscillates! But the sine function... | {"url":"http://facstaff.cbu.edu/~jholmes/P150/Part42/tsld006.htm","timestamp":"2014-04-18T04:06:13Z","content_type":null,"content_length":"1418","record_id":"<urn:uuid:077c70b8-c30e-4aea-af41-e4eeb86f8759>","cc-path":"CC-MAIN-2014-15/segments/1398223207046.13/warc/CC-MAIN-20140423032007-00160-ip-10-147-4-33.ec2.interna... |
Poisson - Finding and Removing outlier
October 1st 2013, 09:58 AM
Poisson - Finding and Removing outlier
Hi !
Sometimes I have lot of "zeroes" sometimes not.
It's for practical sampling, with a lot of figures, so I'd
rather have an easy enough approach then a perfect but complicated solution.
Instru... | {"url":"http://mathhelpforum.com/advanced-statistics/222477-poisson-finding-removing-outlier-print.html","timestamp":"2014-04-17T16:33:27Z","content_type":null,"content_length":"19390","record_id":"<urn:uuid:b2852543-d0ca-485c-a847-448df2335987>","cc-path":"CC-MAIN-2014-15/segments/1397609530136.5/warc/CC-MAIN-20140416... |
Cup Bra
Small Cup Bra Sizing Guide for Petites
There are two fairly reliable ways to find your bra size if you are small-busted. Try each of these and bring your results with you to try on bras in each size you came up with; you may find that one
of these is consistently a better fit than the other, or you may need the... | {"url":"http://32aabra.com/size-fit/comment-page-1/","timestamp":"2014-04-19T09:26:25Z","content_type":null,"content_length":"39770","record_id":"<urn:uuid:dc3dcc7b-4181-4f9a-988a-d18d44c81fb9>","cc-path":"CC-MAIN-2014-15/segments/1397609537097.26/warc/CC-MAIN-20140416005217-00423-ip-10-147-4-33.ec2.internal.warc.gz"} |
Distance Formula Implecations: Urgent!
03-18-2004 #1
Registered User
Join Date
Aug 2003
Distance Formula Implecations: Urgent!
Hello. As we all know, the distance formula is sqrt(sq(x2-x1) + sq(y2 - y1)). sq = square. Now, for some reason, this isn't at all working. Here is my code:
float distance(float x2,... | {"url":"http://cboard.cprogramming.com/c-programming/50785-distance-formula-implecations-urgent.html","timestamp":"2014-04-18T11:15:36Z","content_type":null,"content_length":"64104","record_id":"<urn:uuid:4529068d-689a-40b6-ab3e-c5b7e3973416>","cc-path":"CC-MAIN-2014-15/segments/1397609539776.45/warc/CC-MAIN-2014041600... |
Star Puzzle
Here is an interesting challenge for you. The below mentioned puzzle may appear simple at first, but the solution may be little complex.
Programmers can do some coding to get the answer. If you do that, post it as a comment below. You can use ‘trial and error’ or any other method to get the answer. So here ... | {"url":"http://www.quickermaths.com/star-puzzle/","timestamp":"2014-04-17T12:29:32Z","content_type":null,"content_length":"51090","record_id":"<urn:uuid:24d56441-2272-4ee6-bb56-03195005d1e8>","cc-path":"CC-MAIN-2014-15/segments/1397609530131.27/warc/CC-MAIN-20140416005210-00153-ip-10-147-4-33.ec2.internal.warc.gz"} |
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When an altitude is drawn to the hypotenuse of a right triangl... | {"url":"http://openstudy.com/updates/5023aa66e4b07b8e940dbf5b","timestamp":"2014-04-18T21:30:20Z","content_type":null,"content_length":"67259","record_id":"<urn:uuid:2e5cf92e-455a-46cd-a384-116659429fb9>","cc-path":"CC-MAIN-2014-15/segments/1398223206147.1/warc/CC-MAIN-20140423032006-00652-ip-10-147-4-33.ec2.internal.w... |
Quick and Dirty Regression Tutorial
The statistical procedure known as linear regression basically involves drawing and analyzing trend-lines through data points. Economists use regression analysis to test hypotheses, derived from
economic theory, against real-world data.
In your first microeconomics class you saw theo... | {"url":"http://www.udel.edu/johnmack/frec424/regression/","timestamp":"2014-04-21T02:02:29Z","content_type":null,"content_length":"12264","record_id":"<urn:uuid:431304df-4848-4b5a-bcda-965a060b766e>","cc-path":"CC-MAIN-2014-15/segments/1397609539447.23/warc/CC-MAIN-20140416005219-00172-ip-10-147-4-33.ec2.internal.warc.... |
Math Tools Discussion: All Tools on Flash, Dynamic Triangle Investigation Program
Discussion: All Tools on Flash
Topic: Dynamic Triangle Investigation Program
<< see all messages in this topic
< previous message
Subject: RE: Dynamic Triangle Investigation Program
Author: lata
Date: May 9 2006
Hi Craig,
thank... | {"url":"http://mathforum.org/mathtools/discuss.html?rc=tool&context=cell&do=r&msg=24367","timestamp":"2014-04-16T22:34:59Z","content_type":null,"content_length":"17351","record_id":"<urn:uuid:d7cca4cb-4c84-4cb3-a14a-3781b2ee0a88>","cc-path":"CC-MAIN-2014-15/segments/1397609525991.2/warc/CC-MAIN-20140416005205-00587-ip-... |
FOM: second-order logic is a myth
Stephen G Simpson simpson at math.psu.edu
Wed Mar 10 12:39:22 EST 1999
Robert Black 9 Mar 1999 22:00:22
> is of course something with the power not of set theory but of
> second-order logic that, oddly, no-one (including me) has
> mentioned, namely unrestricted mereology, as used fo... | {"url":"http://www.cs.nyu.edu/pipermail/fom/1999-March/002779.html","timestamp":"2014-04-19T17:07:55Z","content_type":null,"content_length":"4675","record_id":"<urn:uuid:91aaa371-e5ed-4136-a9ab-4bb579218a4d>","cc-path":"CC-MAIN-2014-15/segments/1397609537308.32/warc/CC-MAIN-20140416005217-00659-ip-10-147-4-33.ec2.inter... |
Conceptual Mathematics
Posina Venkata Rayudu, in the spirit of deinstitutionalizing education and of nurturing the universal yearning for understanding, is discussing Conceptual Mathematics (Category Theory). The study of
conceptual mathematics can be motivated by noting the conceptual nature of comprehension and by r... | {"url":"http://conceptualmathematics.wordpress.com/conceptualmathematics/","timestamp":"2014-04-18T10:54:43Z","content_type":null,"content_length":"82405","record_id":"<urn:uuid:0351f0d0-edaf-4ee0-9efc-0c9bf8f6756e>","cc-path":"CC-MAIN-2014-15/segments/1397609533308.11/warc/CC-MAIN-20140416005213-00021-ip-10-147-4-33.e... |
Winners’ notes. Using Multi-Resolution Clustering for Music Genre Identification
April 12, 2011 Leave a Comment
By Amanda Schierz, Marcin Budka and Edward Apeh (domcastro, BeYou) from Bournemouth University, UK, 1st and 2nd in Music Genres track of ISMIS 2011 Contest: Music Information Retrieval.
Thanks for this compet... | {"url":"http://eprints.bournemouth.ac.uk/17678/1/index.html","timestamp":"2014-04-18T06:02:10Z","content_type":null,"content_length":"36418","record_id":"<urn:uuid:d2fa402e-691a-4358-8ee6-82ad087009e6>","cc-path":"CC-MAIN-2014-15/segments/1397609532573.41/warc/CC-MAIN-20140416005212-00012-ip-10-147-4-33.ec2.internal.wa... |
188 helpers are online right now
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Determine if the following limits exist
Please determine the following limits if they exist. If the limit does not exist put DNE.
lim 2+6x-3x^2 / (2x+1)^2
x-> - infinity
lim 4n-3 / 3n^2+2
n-> infinity
I did
lim 2+6x-3x^2 / (2x+1)^2
x-> - infinity
(2/x² + 6/x -3)/(4 + 4/x + 1/x²)
as x-> - infinity. My answer is -3/4
lim... | {"url":"http://www.purplemath.com/learning/viewtopic.php?p=3959","timestamp":"2014-04-20T21:13:30Z","content_type":null,"content_length":"18273","record_id":"<urn:uuid:a082070a-b10c-4bb9-980f-113576e9921f>","cc-path":"CC-MAIN-2014-15/segments/1397609539230.18/warc/CC-MAIN-20140416005219-00363-ip-10-147-4-33.ec2.interna... |
Does a small-area sphere in a 3-manifold bound a small ball?
up vote 15 down vote favorite
Let $M$ be a closed riemannian 3-manifold. I think that the following fact should be true and should have a relatively simple proof, but I cannot figure it out.
For every $\varepsilon>0$ there is a $\delta>0$ such that every ... | {"url":"http://mathoverflow.net/questions/158916/does-a-small-area-sphere-in-a-3-manifold-bound-a-small-ball","timestamp":"2014-04-20T11:32:30Z","content_type":null,"content_length":"63263","record_id":"<urn:uuid:35b40736-ad1c-4f96-9a89-3bcd85cc6c20>","cc-path":"CC-MAIN-2014-15/segments/1398223206147.1/warc/CC-MAIN-201... |
Smart Numerical Analysis Textbox (SNAT)
• Introduction
• Using the control
□ Solving a shared equation
□ Solving single equation
□ Calculator
□ Numeric TextBox
• How control works
• Control properties
• Control events
• Sample program
• Adding control to the project
Suppose that yo... | {"url":"http://www.codeproject.com/Articles/19316/Smart-Numerical-Analysis-Textbox-SNAT?fid=431411&df=10000&mpp=10&noise=1&prof=True&sort=Position&view=Normal&spc=Relaxed","timestamp":"2014-04-18T12:34:43Z","content_type":null,"content_length":"87047","record_id":"<urn:uuid:0cc271f6-4004-42c7-bbdf-b7ccb91ff3a6>","cc-pa... |
Vita of Melvin Henriksen
• Ph.D. Mathematics, University of Wisconsin, 1951
• M.S. Mathematics, University of Wisconsin, 1949
• B.S. Mathematics, City College of New York, 1948
Professional History
• 1997–present Professor Emeritus, Department of Mathematics, Harvey Mudd College
• 1969–1997 Professor of Mathe... | {"url":"http://www.math.hmc.edu/~henriksen/vita/","timestamp":"2014-04-19T06:59:45Z","content_type":null,"content_length":"82077","record_id":"<urn:uuid:908c9bd5-d3e0-4fa6-81c4-45a7a2b01062>","cc-path":"CC-MAIN-2014-15/segments/1397609536300.49/warc/CC-MAIN-20140416005216-00626-ip-10-147-4-33.ec2.internal.warc.gz"} |
BrainBashers : Puzzles and Brain Teasers
What would the probability of rolling a total of 7 be if both dice were 7-sided instead?
How about a 8-sided dice? 9-sided? 10-sided?
[Ref: ZBMA] © Kevin Stone
Hint: How many possible ways are there to make 7?
Back to the puzzles...
This website uses cookies, for more informatio... | {"url":"https://www.brainbashers.com/showhint.asp?ref=ZBMA","timestamp":"2014-04-16T04:13:02Z","content_type":null,"content_length":"6392","record_id":"<urn:uuid:2114f235-f1ff-48d4-8f8a-5797e0163212>","cc-path":"CC-MAIN-2014-15/segments/1397609521512.15/warc/CC-MAIN-20140416005201-00376-ip-10-147-4-33.ec2.internal.warc... |
Current student research projects
To be updated mid-Spring 2014...
Past student research projects
Julian Applebaum: A model of outbound client traffic on the Tor anonymity network (Honors thesis, 2013; advisor: Norman Danner)
Tor is a popular low latency anonymity system. It works by routing web traffic through a serie... | {"url":"http://www.wesleyan.edu/mathcs/cs/student_projects.html","timestamp":"2014-04-18T13:53:28Z","content_type":null,"content_length":"45053","record_id":"<urn:uuid:b9d63b28-d60d-4bb8-a4aa-b759dc250835>","cc-path":"CC-MAIN-2014-15/segments/1397609533689.29/warc/CC-MAIN-20140416005213-00428-ip-10-147-4-33.ec2.interna... |
Computer Geniuses, Simple Math Idiots
We've raised a generation of techno-kids who barely get by 2 plus 2 without a calculator.
Published on: September 26, 2011
Education is in the eye of the beholder. What are taxpayers getting for dollars invested in public education, and what are parents getting for dollars invested... | {"url":"http://farmprogress.com/blogs-computer-geniuses-simple-math-idiots-2652-printversion","timestamp":"2014-04-21T12:17:35Z","content_type":null,"content_length":"19382","record_id":"<urn:uuid:4a6982dc-66ec-4dd6-98d7-500a28b2be07>","cc-path":"CC-MAIN-2014-15/segments/1397609539776.45/warc/CC-MAIN-20140416005219-005... |
Simonton Geometry Tutor
Find a Simonton Geometry Tutor
I have a bachelor's degree in Computer Science with a minor in Spanish. I am not a native speaker, but I am strong in the grammar and technical areas of Spanish and have always had an affinity for
language. I tutored my peers in high school, including a couple ... | {"url":"http://www.purplemath.com/simonton_tx_geometry_tutors.php","timestamp":"2014-04-17T13:31:51Z","content_type":null,"content_length":"23716","record_id":"<urn:uuid:bb05dc9f-b4b7-4dd9-9f2b-7124ab2bf212>","cc-path":"CC-MAIN-2014-15/segments/1397609530131.27/warc/CC-MAIN-20140416005210-00219-ip-10-147-4-33.ec2.inter... |
Programming Praxis - Two Integrals
Programming Praxis – Two Integrals
In today’s Programming Praxis exercise, our task is to write functions to calculate the exponential and logarithmic integrals. Let’s get started, shall we?
The exponential integral is just executable math, with the only addition being a limit on the ... | {"url":"http://bonsaicode.wordpress.com/2011/01/11/programming-praxis-two-integrals/","timestamp":"2014-04-19T12:17:31Z","content_type":null,"content_length":"48456","record_id":"<urn:uuid:a6a692be-6bae-4328-b2e2-1a962167dffb>","cc-path":"CC-MAIN-2014-15/segments/1398223205137.4/warc/CC-MAIN-20140423032005-00246-ip-10-... |
delete by copy only for non-children nodes?
11-16-2006 #1
Registered User
Join Date
Jun 2006
delete by copy only for non-children nodes?
Hello yet again! This is a different problem with the same project, so I thought I'd create a new thread. Anyways, the project is to: create a binary tree randomly, then delet... | {"url":"http://cboard.cprogramming.com/cplusplus-programming/85485-delete-copy-only-non-children-nodes.html","timestamp":"2014-04-16T18:01:50Z","content_type":null,"content_length":"107527","record_id":"<urn:uuid:e34676be-e720-415a-a629-28a493d65a9c>","cc-path":"CC-MAIN-2014-15/segments/1397609524259.30/warc/CC-MAIN-20... |
MSAN504 2013
MSAN 504 - Review of Probability and Statistics
Instructor: Jeff Hamrick
Course Syllabus
Summer 2013
Instructor: Jeff Hamrick, Ph.D., CFA, FRM
Office: Masonic 211
Office Hours: Half an hour before and after class.
Cell Phone: 617/943-4619
Email Address: jhamrick@usfca.edu
Class Location: 101 Howard Street,... | {"url":"http://msan504.analytics.usfca.edu/","timestamp":"2014-04-18T23:15:36Z","content_type":null,"content_length":"22654","record_id":"<urn:uuid:52d237bb-c64b-4a09-8698-0c88054986f9>","cc-path":"CC-MAIN-2014-15/segments/1397609535535.6/warc/CC-MAIN-20140416005215-00546-ip-10-147-4-33.ec2.internal.warc.gz"} |
Note: The cost of retrieval time
The assumption that the cost to the user associated with a certain retrieval time is linear in that time is wildly innaccurate. The real function could be very dependent on circumstances (like go to
infinity at a deadline).
A better general approximation might be logarithmic for large t... | {"url":"http://www.w3.org/Protocols/HTTP/TimeCost.html","timestamp":"2014-04-20T23:48:44Z","content_type":null,"content_length":"1290","record_id":"<urn:uuid:4adcc7aa-cb40-437a-90e0-755b0a1a9da8>","cc-path":"CC-MAIN-2014-15/segments/1397609539337.22/warc/CC-MAIN-20140416005219-00201-ip-10-147-4-33.ec2.internal.warc.gz"... |
Flux Imbalance Analysis and the Sensitivity of Cellular Growth to Changes in Metabolite Pools
Stoichiometric models of metabolism, such as flux balance analysis (FBA), are classically applied to predicting steady state rates - or fluxes - of metabolic reactions in genome-scale metabolic
networks. Here we revisit the ce... | {"url":"http://www.ploscompbiol.org/article/info%3Adoi%2F10.1371%2Fjournal.pcbi.1003195","timestamp":"2014-04-16T18:09:41Z","content_type":null,"content_length":"235339","record_id":"<urn:uuid:c1e08056-d239-4036-bbc8-37263f49529e>","cc-path":"CC-MAIN-2014-15/segments/1397609524259.30/warc/CC-MAIN-20140416005204-00349-i... |
Puzzle for 24 Jun 2009
Find Smallest 3 digit prime number which has
1. All unique digits
2. All the digits are prime
3. Any combination of those digits are also prime
What does this mean : "Any combination of those digits are also prime" ??
Any 2-digit, 3-digit, 4-digit or how many digit combination ?!?
here, 197, 9... | {"url":"http://www.go4expert.com/contests/puzzle-for-24-jun-2009-t18168/","timestamp":"2014-04-16T17:23:42Z","content_type":null,"content_length":"46606","record_id":"<urn:uuid:eb83ec45-6814-448e-8187-abc3a9c4e72c>","cc-path":"CC-MAIN-2014-15/segments/1397609526252.40/warc/CC-MAIN-20140416005206-00093-ip-10-147-4-33.ec... |
What Is The Subject? I Need Help!
March 27th 2008, 12:20 AM #1
Mar 2008
What Is The Subject? I Need Help!
Okay.. it says on my assignment ..
"to solve an equation we sometimes have to change the subject"
first of all.. what is the subject?
thats the first question. and then the second question says.... | {"url":"http://mathhelpforum.com/algebra/32206-what-subject-i-need-help.html","timestamp":"2014-04-18T10:47:11Z","content_type":null,"content_length":"35457","record_id":"<urn:uuid:31234c26-be98-4ffa-8a13-56c3670285e2>","cc-path":"CC-MAIN-2014-15/segments/1397609535775.35/warc/CC-MAIN-20140416005215-00039-ip-10-147-4-3... |
Function Problems
09-27-2005 #1
Registered User
Join Date
Sep 2005
Function Problems
Hello all,
Quite new at this programming stuff, and am having a few problems with functions...i have four questions:
I need functions:
1. that accepts an integer and returns the sum of squares of all numbers from 1 ... | {"url":"http://cboard.cprogramming.com/cplusplus-programming/70168-function-problems.html","timestamp":"2014-04-21T08:47:45Z","content_type":null,"content_length":"92512","record_id":"<urn:uuid:7fead28b-2a65-472e-a5d8-1e2ef1789c4e>","cc-path":"CC-MAIN-2014-15/segments/1397609539665.16/warc/CC-MAIN-20140416005219-00155-... |
Exploring Data in Excel with Conditional Formatting
Conditional formatting is a hidden gem in Excel. It’s fairly easy to use, works well, and doesn’t get in your way. Here’s how we use it to assist in data exploration.
Conditional formatting is found in the Format menu. Most people are probably familiar with using it t... | {"url":"http://www.juiceanalytics.com/writing/exploring-data-in-excel-with-conditional-formatting/","timestamp":"2014-04-20T15:52:22Z","content_type":null,"content_length":"59185","record_id":"<urn:uuid:c62d6557-313b-4ba5-bb39-bd74a33c86ff>","cc-path":"CC-MAIN-2014-15/segments/1398223206672.15/warc/CC-MAIN-201404230320... |
Gimbal Lock
Gimbal Lock is a problem that arises when using Euler angles to perform rotations on objects in three dimensional space, most commonly experienced in 3D computer programs. It occurs when two axis
become aligned during rotational operations. When this happens one degree of freedom is lost and cannot be regai... | {"url":"http://www.everything2.com/title/Gimbal+Lock","timestamp":"2014-04-20T10:51:03Z","content_type":null,"content_length":"26192","record_id":"<urn:uuid:221cc483-85c3-45ea-9866-8b2b176e6e49>","cc-path":"CC-MAIN-2014-15/segments/1397609538423.10/warc/CC-MAIN-20140416005218-00160-ip-10-147-4-33.ec2.internal.warc.gz"} |
Large numbers
Date: Wed, 16 Nov 94 10:56:16 PST
From: Keith Averell
Subject: grade 3 math
Dear Dr. Math:
I am wondering, what is it like to be a college math whiz. Where is your
college located? Oh ya, I want to know what 1,000,000,000,000,000 is?
Thanks For Your Help
Matt Yarbrough
Date: Thu, 17 ... | {"url":"http://mathforum.org/library/drmath/view/59160.html","timestamp":"2014-04-17T05:34:06Z","content_type":null,"content_length":"6652","record_id":"<urn:uuid:9225fb98-a6b2-4e8f-8082-b917c3dac264>","cc-path":"CC-MAIN-2014-15/segments/1397609526252.40/warc/CC-MAIN-20140416005206-00112-ip-10-147-4-33.ec2.internal.war... |
Need help with search formula
456 Views 6 Replies Latest reply
: Mar 21, 2013 12:48 AM by Barry
• How does Numbers know which is "the selected row"?
How does Numbers know what is the "specific label"? How is it specified?
What result is returned when the label is found? To where is that result returned?
... | {"url":"https://discussions.apple.com/message/21560563","timestamp":"2014-04-19T02:02:58Z","content_type":null,"content_length":"212465","record_id":"<urn:uuid:ccb5e35a-b536-4a82-be67-01f8bed7326b>","cc-path":"CC-MAIN-2014-15/segments/1397609535745.0/warc/CC-MAIN-20140416005215-00143-ip-10-147-4-33.ec2.internal.warc.gz... |
Sphere/Rectangle collision detection
I'm writing a Pong clone, and am having trouble with the collision detection, as I'm only working on completing Algebra I as of right now (I'm most of the way through). I have an NSRect for the
paddle, an NSPoint for the center of the ball, and a float for the radius of the ball.
Ho... | {"url":"http://idevgames.com/forums/thread-7209.html","timestamp":"2014-04-20T16:04:22Z","content_type":null,"content_length":"30554","record_id":"<urn:uuid:e9ca703b-18cc-4de2-8f59-71decedb0056>","cc-path":"CC-MAIN-2014-15/segments/1398223206672.15/warc/CC-MAIN-20140423032006-00375-ip-10-147-4-33.ec2.internal.warc.gz"} |
Trig Substitution: Completing the Square Part 2/2 Video | MindBites
Trig Substitution: Completing the Square Part 2/2
About this Lesson
• Type: Video Tutorial
• Length: 4:20
• Media: Video/mp4
• Use: Watch Online & Download
• Access Period: Unrestricted
• Download: MP4 (iPod compatible)
• Size: 47 MB
• ... | {"url":"http://www.mindbites.com/lesson/9100-trig-substitution-completing-the-square-part-2-2","timestamp":"2014-04-19T19:38:26Z","content_type":null,"content_length":"50259","record_id":"<urn:uuid:a21fe93a-84dd-4669-8990-134a04be89ca>","cc-path":"CC-MAIN-2014-15/segments/1397609537376.43/warc/CC-MAIN-20140416005217-00... |
Reply to comment
Reply to comment
Thursday, July 23, 2009 - 7:44pm
My friend and U of C classmate pointed out to me an interview in a recent issue of the Chicago Maroon with Paul Sally, Professor of Mathematics and mentor to generations of mathematicians and
mathematics educators. He has a few good words about the prac... | {"url":"http://www.cims.nyu.edu/~leingang/comment/reply/37","timestamp":"2014-04-18T16:30:06Z","content_type":null,"content_length":"17593","record_id":"<urn:uuid:e5997a20-d021-4a6c-aa3a-0dfc033e193a>","cc-path":"CC-MAIN-2014-15/segments/1398223205137.4/warc/CC-MAIN-20140423032005-00168-ip-10-147-4-33.ec2.internal.warc... |
Redwood Estates Math Tutor
Find a Redwood Estates Math Tutor
I believe that the biggest hurdle to overcome with most struggling students is a fear of failure. Let me help your child to build the confidence they need to be successful. I'm an Australian high
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Winfield, IL Science Tutor
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...But I emphasize understanding the subjects. I lead my students to think and reason logically while I teach so that they can solve problems by themselves during a test, for instance. I can not
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Determinants and Eigenvalues
1. The problem statement
For integers m >= n,
Prove det(xI[m] - AB) = x^m-ndet(xI[n] - BA) for any x in R.
2. Relevant equations
A is an m x n matrix
B is an n x m matrix
3. The attempt at a solution
I tried working out the characteristic polynomials by hand but it just seems too tedious fo... | {"url":"http://www.physicsforums.com/showthread.php?p=2414795","timestamp":"2014-04-18T21:34:51Z","content_type":null,"content_length":"22797","record_id":"<urn:uuid:f88f373e-8d93-4906-aa9b-7eb1d6bba3db>","cc-path":"CC-MAIN-2014-15/segments/1397609535095.9/warc/CC-MAIN-20140416005215-00566-ip-10-147-4-33.ec2.internal.w... |
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I’m currently reading the book ‘Ubiquity’ by Mark Buchanan and I find that it is written very well. Here are some thoughts that occurred to me while reading, feel free to comment
Power Law.
While on one hand, the fact that this law describes many different processes makes it certainly interesting to investigate, on the... | {"url":"http://blog.poucet.org/2006/04/07/","timestamp":"2014-04-21T15:00:15Z","content_type":null,"content_length":"27420","record_id":"<urn:uuid:b8f3771b-3e0d-4d15-97ff-bfad13fb5166>","cc-path":"CC-MAIN-2014-15/segments/1398223207046.13/warc/CC-MAIN-20140423032007-00478-ip-10-147-4-33.ec2.internal.warc.gz"} |
User talk:Ben G. Fitzpatrick
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[FOM] Preprint: "The unification of Mathematics via Topos Theory"
[FOM] Preprint: "The unification of Mathematics via Topos Theory"
Vaughan Pratt pratt at cs.stanford.edu
Fri Jul 9 03:18:44 EDT 2010
With the exception of the introductory sections 1 and 2, every section
of this ten-section paper either refers to or depe... | {"url":"http://www.cs.nyu.edu/pipermail/fom/2010-July/014879.html","timestamp":"2014-04-17T12:32:58Z","content_type":null,"content_length":"7118","record_id":"<urn:uuid:3be524e2-573a-47ac-a358-3d987eaad643>","cc-path":"CC-MAIN-2014-15/segments/1397609530131.27/warc/CC-MAIN-20140416005210-00217-ip-10-147-4-33.ec2.intern... |
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Bellwood, IL Algebra 1 Tutor
Find a Bellwood, IL Algebra 1 Tutor
...Hope to hear from you soon! ElizabethAs a biology major at Elmhurst College, I was required to take a general biology course that included a good deal of genetics in the curriculum. I was also
required to complete a general genetics course.
14 Su... | {"url":"http://www.purplemath.com/Bellwood_IL_algebra_1_tutors.php","timestamp":"2014-04-17T04:45:46Z","content_type":null,"content_length":"24125","record_id":"<urn:uuid:2b8c01a1-3d92-41de-9d10-e5a7806e6934>","cc-path":"CC-MAIN-2014-15/segments/1397609526252.40/warc/CC-MAIN-20140416005206-00049-ip-10-147-4-33.ec2.inte... |
1061: EST
Explain xkcd: It's 'cause you're dumb.
Title text: The month names are the same, except that the fourth month only has the name 'April' in even-numbered years, and is otherwise unnamed.
[edit] Explanation
This comic pokes fun of attempts to "fix" the calendar by making it simpler or more rational, which ine... | {"url":"http://www.explainxkcd.com/wiki/index.php?title=EST","timestamp":"2014-04-21T02:09:47Z","content_type":null,"content_length":"39562","record_id":"<urn:uuid:1ba99d07-48c6-49bd-95d0-3daf56b445b4>","cc-path":"CC-MAIN-2014-15/segments/1398223203841.5/warc/CC-MAIN-20140423032003-00568-ip-10-147-4-33.ec2.internal.war... |
Martins Creek SAT Math Tutor
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...Sorry! **I got 5s in the following AP tests: Physics B, Physics C Mechanics, Physics C E&M. I have been designing websites in HTML and CSS for several years. (I have implemented a bit of PHP as
well.) I served as Webmaster of multiple student organ... | {"url":"http://www.purplemath.com/Martins_Creek_SAT_Math_tutors.php","timestamp":"2014-04-16T04:37:27Z","content_type":null,"content_length":"24183","record_id":"<urn:uuid:d79e17d7-a120-4060-80bf-e99e7c8a754a>","cc-path":"CC-MAIN-2014-15/segments/1398223207046.13/warc/CC-MAIN-20140423032007-00299-ip-10-147-4-33.ec2.int... |
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versão impressa ISSN 0006-8705
BRIEGER, F. G.. Coeficiente de variação e índice de variança. Bragantia [online]. 1942, vol.2, n.9, pp. 313-331. ISSN 0006-8705. http://dx.doi.org/10.1590/S0006-87051942000900001.
The object of the present paper is a study of the usefulness of t... | {"url":"http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0006-87051942000900001&lng=pt&nrm=iso&tlng=en","timestamp":"2014-04-19T00:36:58Z","content_type":null,"content_length":"18385","record_id":"<urn:uuid:70abe54a-31ce-4717-86a1-37f596fc2f85>","cc-path":"CC-MAIN-2014-15/segments/1397609535535.6/warc/CC-MAIN-2... |
Higher Dimensions Database
Tapertopic notation (InstanceTopic, 3)
From Higher Dimensions Database
Tapertopic notation is a notation developed to represent tapertopes. Each digit represents a hypersphere, square brackets represent a Cartesian product, and a superscript n indicates n consecutive
taperings. Unlike rotopic... | {"url":"http://hddb.teamikaria.com/wiki/Tapertopic_notation","timestamp":"2014-04-20T13:25:08Z","content_type":null,"content_length":"14104","record_id":"<urn:uuid:6979c7ca-d311-42e5-8728-82789407fedf>","cc-path":"CC-MAIN-2014-15/segments/1397609538787.31/warc/CC-MAIN-20140416005218-00340-ip-10-147-4-33.ec2.internal.wa... |
Inverse cotangent: Representations through equivalent functions (subsection 27/02)
With related functions
Involving log
Involving sin^-1
Involving cot^-1(z)
Involving cot^-1(z) and sin^-1(2 z/1+z^2)
Involving cot^-1(z) and sin^-1(1-z^2/1+z^2)
Involving cot^-1(z) and sin^-1(z^2-1/z^2-1)
Involving cot^-1(z) and sin^-1(1/... | {"url":"http://functions.wolfram.com/ElementaryFunctions/ArcCot/27/02/ShowAll.html","timestamp":"2014-04-21T02:21:22Z","content_type":null,"content_length":"1047528","record_id":"<urn:uuid:a264a432-88eb-4ad1-ab62-98fad384015f>","cc-path":"CC-MAIN-2014-15/segments/1397609539447.23/warc/CC-MAIN-20140416005219-00533-ip-10... |
5pMU1. Applying root-locus techniques to the analysis of coupled modes in piano strings.
Session: Friday Afternoon, December 6
Time: 2:00
Author: Timothy S. Stilson
Location: Ctr. for Comput. Res. in Music and Acoust., Stanford Univ., 660 Lomita Dr., Stanford, CA 94305
Author: Scott A. Van Duyne
Location: Ctr. for Comp... | {"url":"http://www.auditory.org/asamtgs/asa96haw/5pMU/5pMU1.html","timestamp":"2014-04-18T09:07:50Z","content_type":null,"content_length":"2031","record_id":"<urn:uuid:74b04061-fedc-416b-910d-dd4b7b87a182>","cc-path":"CC-MAIN-2014-15/segments/1397609533121.28/warc/CC-MAIN-20140416005213-00253-ip-10-147-4-33.ec2.interna... |
Maintaining secure communication in networks for long terms, manuscript
- ADVANCES IN CRYPTOLOGY: EUROCRYPT '99, VOLUME 1592 OF LECTURE NOTES IN COMPUTER SCIENCE , 1999
"... This work describes schemes for distributing between n servers the evaluation of a function f which is an approximation to a random function, such... | {"url":"http://citeseerx.ist.psu.edu/showciting?cid=1723200","timestamp":"2014-04-24T06:57:17Z","content_type":null,"content_length":"12681","record_id":"<urn:uuid:7036f743-a2fb-401f-88c0-bc41fe215334>","cc-path":"CC-MAIN-2014-15/segments/1398223205375.6/warc/CC-MAIN-20140423032005-00108-ip-10-147-4-33.ec2.internal.war... |
Circuit's RMS output is linearly proportional to temperature over wide range
It is known that the p-n diode can be the basis of an accurate thermometer for cryogenic temperatures up to about 200°C. A constant current is maintained through the diode and the voltage across it
gives an indication of the temperature. The m... | {"url":"http://www.edn.com/design/components-and-packaging/4405267/Circuit-s-RMS-output-is-linearly-proportional-to-temperature-over-wide-range","timestamp":"2014-04-18T08:03:08Z","content_type":null,"content_length":"66812","record_id":"<urn:uuid:4d2710c5-7e03-4449-a898-3fcaa6329d7e>","cc-path":"CC-MAIN-2014-15/segmen... |
370 pounds in aud
You asked:
370 pounds in aud
Say hello to Evi
Evi is our best selling mobile app that can answer questions about local knowledge, weather, books, music, films, people and places, recipe ideas, shopping and much more. Over the next few months we
will be adding all of Evi's power to this site.
Until the... | {"url":"http://www.evi.com/q/370_pounds_in_aud","timestamp":"2014-04-16T22:54:10Z","content_type":null,"content_length":"55562","record_id":"<urn:uuid:28ec0ff3-8e68-4090-83d3-acf06ef6ae8a>","cc-path":"CC-MAIN-2014-15/segments/1397609525991.2/warc/CC-MAIN-20140416005205-00089-ip-10-147-4-33.ec2.internal.warc.gz"} |
Applied Linear Equations: Investment Problem - Concept
In Algebra II and in the real world, sometimes we need to solve investment math problems by using linear equations. When solving word problems using linear equations, we first need to pull out the
relevant information and put it into equation form. When working wit... | {"url":"https://www.brightstorm.com/math/precalculus/linear-equations-and-inequalities/applied-linear-equations-investment-problems/","timestamp":"2014-04-20T09:14:02Z","content_type":null,"content_length":"67247","record_id":"<urn:uuid:63e9e4ee-c1ea-4542-8642-e34587bff2dc>","cc-path":"CC-MAIN-2014-15/segments/13976095... |
Flipping between p-adics and reals
November 9th 2013, 10:58 AM #1
MHF Contributor
Nov 2010
Flipping between p-adics and reals
Let $x\in \mathbb{Q}_p$. We can represent $x$ by the p-adic series $x=\sum_{n\ge k}a_np^n, k,a_n \in \mathbb{Z}, 0\le a_n < p$. Define $f_p:\mathbb{Q}_p \to \mathbb{R}$ by $f_p(x) = \sum... | {"url":"http://mathhelpforum.com/differential-geometry/224043-flipping-between-p-adics-reals.html","timestamp":"2014-04-16T08:45:58Z","content_type":null,"content_length":"31123","record_id":"<urn:uuid:6f16766d-5449-4803-98ab-3d3119bb4950>","cc-path":"CC-MAIN-2014-15/segments/1397609521558.37/warc/CC-MAIN-2014041600520... |
the first resource for mathematics
Sparse approximate solutions to linear systems.
(English) Zbl 0827.68054
Summary: The following problem is considered: given a matrix $A$ in ${ℝ}^{m×n}$, ($m$ rows and $n$ columns), a vector $b$ in ${ℝ}^{m}$, and $\epsilon >0$, compute a vector $x$ satisfying ${|Ax-b|}_
{2}\le \epsilo... | {"url":"http://zbmath.org/?q=an:0827.68054&format=complete","timestamp":"2014-04-20T18:53:10Z","content_type":null,"content_length":"22785","record_id":"<urn:uuid:812cd39f-22cf-49ea-aed1-0e9a12a96b20>","cc-path":"CC-MAIN-2014-15/segments/1397609539066.13/warc/CC-MAIN-20140416005219-00135-ip-10-147-4-33.ec2.internal.war... |
Integration by Darboux
July 11th 2011, 05:19 AM #1
Junior Member
Nov 2010
Integration by Darboux
Let h be a bounded function in [a,b] and let c be a point in [a,b]. Prove that for all e>0, there exists d>0 such that for every partition P of the [a,b] with parameter m(P)<d the following is
where U(h,R) is th... | {"url":"http://mathhelpforum.com/calculus/184409-integration-darboux.html","timestamp":"2014-04-23T19:44:32Z","content_type":null,"content_length":"39361","record_id":"<urn:uuid:49ac1b22-2594-42ee-af8d-2009afaa1cd8>","cc-path":"CC-MAIN-2014-15/segments/1398223203422.8/warc/CC-MAIN-20140423032003-00282-ip-10-147-4-33.ec... |
Kepler's Constant
Recall again,
[4] nu-dot = K/rho^2 (K a constant)
We now wish to evaluate this constant, which depends of course on the planetary data, and the units used to measure angle, distance, and time. At this point we will refer to planetary data for the
first time, as thus far the ellipse has been arbitr... | {"url":"http://www.visual-kepler.org/laws/secondlaw/constant.html","timestamp":"2014-04-20T23:27:02Z","content_type":null,"content_length":"3812","record_id":"<urn:uuid:610af86b-0202-476e-a494-73958a790abb>","cc-path":"CC-MAIN-2014-15/segments/1398223203235.2/warc/CC-MAIN-20140423032003-00527-ip-10-147-4-33.ec2.interna... |
Fast, High-Quality, Parallel Random Number Generators
Some Recommended 32-bit Combination Generators
Before listing more combination generators, I'll first recommend that you use a 64-bit generator if you can, because tests show that they are generally more robust (having fewer borderline passes in
tests and a higher o... | {"url":"http://www.drdobbs.com/tools/fast-high-quality-parallel-random-number/229625477?pgno=2","timestamp":"2014-04-19T04:36:08Z","content_type":null,"content_length":"102852","record_id":"<urn:uuid:2810dbf3-0efa-42b8-8819-93bd2478fcb4>","cc-path":"CC-MAIN-2014-15/segments/1397609535775.35/warc/CC-MAIN-20140416005215-... |
Applied Mathematics, Volume 2: Fractions
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Applied Mathematics, Volume 1: NumerationApplied Mathematics, Volume 3: Decimals
Applied Mathematics, Volume 2: Fractions
View Price per Unit (... | {"url":"http://www.kimbercurriculum.com/index.php?page=shop.product_details&flypage=flypage.tpl&product_id=21&category_id=11&option=com_virtuemart&Itemid=75&vmcchk=1&Itemid=75","timestamp":"2014-04-20T13:26:58Z","content_type":null,"content_length":"18567","record_id":"<urn:uuid:32788e95-1d70-4c6c-b1ae-ac172a33512d>","... |
Deciphering Network Community Structure by Surprise
The analysis of complex networks permeates all sciences, from biology to sociology. A fundamental, unsolved problem is how to characterize the community structure of a network. Here, using both
standard and novel benchmarks, we show that maximization of a simple globa... | {"url":"http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0024195","timestamp":"2014-04-24T16:46:41Z","content_type":null,"content_length":"134583","record_id":"<urn:uuid:da61fe41-a8a3-4119-afce-0a6921e063ac>","cc-path":"CC-MAIN-2014-15/segments/1398223206647.11/warc/CC-MAIN-20140423032006-00572-ip-10-... |
angle preserving transformations
If x,y of R^n (as a normed vector space) are non-zero, the angle between x and y, denoted <(x,y), is defined as arccos x.y/(|x||y|).
The linear transformation T :R^n----->R^n
is angle preserving if T is 1-1, and for x,y of R^n (x,y are non zero) we have
<(Tx,Ty) = <(x,y).
what are all a... | {"url":"http://www.physicsforums.com/showthread.php?t=176635","timestamp":"2014-04-20T11:31:07Z","content_type":null,"content_length":"22220","record_id":"<urn:uuid:8e6a26c4-682c-4200-9178-80a2c024237d>","cc-path":"CC-MAIN-2014-15/segments/1397609538423.10/warc/CC-MAIN-20140416005218-00100-ip-10-147-4-33.ec2.internal.w... |
The continuity of f
yeah, that's about the limit of my analysis knowledge, how would you use the ε,δ definition?
Take an [itex]a\in \mathbb{R}[/itex]. You will need to prove
[tex]\forall \varepsilon >0: \exists \delta >0: \forall x: |x-a|<\delta~\Rightarrow ||f(x)|-|f(a)||<\varepsilon[/tex]
You are given that f is cont... | {"url":"http://www.physicsforums.com/showthread.php?p=4259921","timestamp":"2014-04-21T07:23:35Z","content_type":null,"content_length":"55337","record_id":"<urn:uuid:4632fe6b-9bb3-4292-addd-5fe74de20bc2>","cc-path":"CC-MAIN-2014-15/segments/1397609539665.16/warc/CC-MAIN-20140416005219-00318-ip-10-147-4-33.ec2.internal.... |
Building the Swiss Army Knife
May 2, 2012
Guest post by Boaz Barak and Zvika Brakerski (part 2)
In the previous post, we demonstrated the versatility of fully homomorphic encryption and its applicability for multiple applications. In this post we will demonstrate (not too painfully, we hope)
how fully homomorphic encry... | {"url":"http://windowsontheory.org/2012/05/02/building-the-swiss-army-knife/","timestamp":"2014-04-19T12:38:03Z","content_type":null,"content_length":"105927","record_id":"<urn:uuid:c8980abb-4fe6-493d-8c83-0562998caf44>","cc-path":"CC-MAIN-2014-15/segments/1398223211700.16/warc/CC-MAIN-20140423032011-00525-ip-10-147-4-... |
Shape and Size of the Earth
Geodesy is the science that studies the shape and size of the Earth. As discussed in Voyagers, the shape of the earth was long known to be round. Aristotle and Pythagoras both argued that the earth
was a sphere from the curved shadow it cast during lunar eclipses. About two thousand years la... | {"url":"http://aerospace.wcc.hawaii.edu/shape.html","timestamp":"2014-04-20T03:44:19Z","content_type":null,"content_length":"8157","record_id":"<urn:uuid:d37763dd-d8df-4e37-a939-dd618accd6b3>","cc-path":"CC-MAIN-2014-15/segments/1397609537864.21/warc/CC-MAIN-20140416005217-00395-ip-10-147-4-33.ec2.internal.warc.gz"} |
Reiteration and a Wolff Theorem for Interpolation Methods Defined by Means of Polygons
Cobos, Fernando and Fernández-Martínez, Pedro (1992) Reiteration and a Wolff Theorem for Interpolation Methods Defined by Means of Polygons. Studia Mathematica, 102 (3). pp. 239-256. ISSN 0039-3223
Restricted to Repository staff on... | {"url":"http://eprints.ucm.es/15369/","timestamp":"2014-04-19T17:20:22Z","content_type":null,"content_length":"22511","record_id":"<urn:uuid:7c561d7b-34c1-4b23-996b-1882e1d7a4ed>","cc-path":"CC-MAIN-2014-15/segments/1397609537308.32/warc/CC-MAIN-20140416005217-00555-ip-10-147-4-33.ec2.internal.warc.gz"} |