content stringlengths 86 994k | meta stringlengths 288 619 |
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super fast trig functions
I was just thinking of some ways you could compute maclaurin or taylor expansions as quick as possible. Consider the maclauren expansion for sin(x)
or in sumation:
note that
(2n -1)! = (2n-1)(2n-2)(2n - 3)! and (2n - 3)! is the factorial of the preceding term.
which also appears in the precedi... | {"url":"http://www.mathisfunforum.com/viewtopic.php?pid=84599","timestamp":"2014-04-17T00:55:31Z","content_type":null,"content_length":"33477","record_id":"<urn:uuid:e774fa3e-c0ef-41b1-987e-a0251febf43d>","cc-path":"CC-MAIN-2014-15/segments/1397609526102.3/warc/CC-MAIN-20140416005206-00612-ip-10-147-4-33.ec2.internal.w... |
Exploring Repayment Loans
Exploring Repayment Loans Follow
Repayment schedules
Repayment loans are often arranged and then subject to much on-going scrutiny and ... | {"url":"http://www.i-programmer.info/ebooks/financial-functions/598-repayment-loans.html?start=2","timestamp":"2014-04-21T12:11:43Z","content_type":null,"content_length":"36025","record_id":"<urn:uuid:ab2d1ace-d6ac-4b3c-a814-172fc9b80c28>","cc-path":"CC-MAIN-2014-15/segments/1397609539776.45/warc/CC-MAIN-20140416005219... |
derivative of inverse trig function
y= tan^(-1)[x^2-1]^(1/2) + csc^(-1)x i cannot get to the answer, please help.
no i have definitely tried working it out already. i took derivative of both sides of the plus sign the answer should come out to zero but im not getting newhere near that. im getting something like
x/ [(x^... | {"url":"http://mathhelpforum.com/calculus/19835-derivative-inverse-trig-function.html","timestamp":"2014-04-18T14:14:46Z","content_type":null,"content_length":"35629","record_id":"<urn:uuid:18ff1c03-fbde-48bb-83a7-46e5f9703842>","cc-path":"CC-MAIN-2014-15/segments/1397609533689.29/warc/CC-MAIN-20140416005213-00584-ip-1... |
The pattern.metrics module is a loose collection of performance, accuracy, similarity and significance tests, including code profiling, precision & recall, inter-rater agreement, text metrics
(similarity, readability, intertextuality, cooccurrence) and statistics (variance, chi-squared, goodness of fit).
It can be used... | {"url":"http://www.cnts.ua.ac.be/pages/pattern-metrics","timestamp":"2014-04-18T00:13:47Z","content_type":null,"content_length":"53934","record_id":"<urn:uuid:ac197438-96e0-4ab0-9234-4226e8d5f857>","cc-path":"CC-MAIN-2014-15/segments/1398223211700.16/warc/CC-MAIN-20140423032011-00189-ip-10-147-4-33.ec2.internal.warc.gz... |
Theoretical yield of sodium chloride from sodium bicarbonate
I need to calculate the theoretical yield of mass of sodium chloride which should have been produced in a reaction.
We used sodium bicarbonate and hydrochloric acid in the reaction.
I balanced the equation as Na4C2+4HCl --> 4NaCl+H4C2
I don't know if I even s... | {"url":"http://yeahchemistry.com/questions/theoretical-yield-sodium-chloride-sodium-bicarbonate","timestamp":"2014-04-25T06:03:56Z","content_type":null,"content_length":"27679","record_id":"<urn:uuid:46aade91-0e64-4d3a-9e6f-a3b2f58dce74>","cc-path":"CC-MAIN-2014-15/segments/1398223210034.18/warc/CC-MAIN-20140423032010-... |
Of GTIs, battery sizing, and capacitor banks
March 16th, 2012, 20:38 PDT #1
New User
Join Date
Mar 2012
I work for a fuel-cell R & D. We're building a 5kW (low-voltage) fuel-cell system that I wanted to tie into a grid using an XW6048, a model which requires a 48V-nominal battery bank to run
Looking around ... | {"url":"http://forum.solar-electric.com/showthread.php?15053-Of-GTIs-battery-sizing-and-capacitor-banks","timestamp":"2014-04-17T03:48:48Z","content_type":null,"content_length":"89242","record_id":"<urn:uuid:56631eaf-cc86-414d-9d3f-64239a3c557d>","cc-path":"CC-MAIN-2014-15/segments/1398223206120.9/warc/CC-MAIN-20140423... |
Properties of the evolute
Properties of the evolute
From (14.8),
Let us choose as independent variable the lengths of the arc on the given curve; then , , , , , are functions of . Differentiating (14.18) with respect to gives
But , , from (9.5); and , from (12.1) and (12.2).
Substituting in (14.19) and (14.20), we obta... | {"url":"http://www.opensourcemath.org/books/calc1-sage/html/Properties_evolute.html","timestamp":"2014-04-17T04:00:45Z","content_type":null,"content_length":"15791","record_id":"<urn:uuid:5de0e823-d712-4623-b762-3a3a91bbcd30>","cc-path":"CC-MAIN-2014-15/segments/1398223203422.8/warc/CC-MAIN-20140423032003-00434-ip-10-1... |
Question about proof of subspace.
October 25th 2010, 04:18 PM #1
Junior Member
Nov 2008
Question about proof of subspace.
Ok I want to make sure I am understanding this question and the concepts behind it.
*I'm going to use P,4 to denote P subscript 4*
Q: Determine whether the following are subspaces of... | {"url":"http://mathhelpforum.com/advanced-algebra/160976-question-about-proof-subspace.html","timestamp":"2014-04-18T08:28:33Z","content_type":null,"content_length":"34853","record_id":"<urn:uuid:61141458-9831-4218-914b-0685f2ccedc9>","cc-path":"CC-MAIN-2014-15/segments/1397609533121.28/warc/CC-MAIN-20140416005213-0001... |
Coin Tricks
September 18th 2008, 08:29 PM
Coin Tricks
by moving 1 coin only how can you make 2 lines of 3 coins.
coin are labelled as
omg i can't place the letter E and F at the top and bottom of C.... Hope anyone can understand
September 18th 2008, 08:37 PM
Don't you already have 2 rows of 3 coins?
... | {"url":"http://mathhelpforum.com/math-topics/49714-coin-tricks-print.html","timestamp":"2014-04-19T17:40:56Z","content_type":null,"content_length":"14354","record_id":"<urn:uuid:ad68cba2-faaf-4194-9484-47fe72cad1cf>","cc-path":"CC-MAIN-2014-15/segments/1397609537308.32/warc/CC-MAIN-20140416005217-00648-ip-10-147-4-33.e... |
the encyclopedic entry of Hadamard factorization theorem
, the
Weierstrass factorization theorem
complex analysis
, named after
Karl Weierstrass
, asserts that
entire functions
can be represented by a product involving their
. In addition, every sequence tending to infinity has an associated entire function with zeroes... | {"url":"http://www.reference.com/browse/Hadamard+factorization+theorem","timestamp":"2014-04-19T23:46:04Z","content_type":null,"content_length":"83391","record_id":"<urn:uuid:9a9e6e35-e58d-4e68-83b0-2c66868085bf>","cc-path":"CC-MAIN-2014-15/segments/1398223206120.9/warc/CC-MAIN-20140423032006-00283-ip-10-147-4-33.ec2.i... |
Gravity-Driven Water Flow in Networks: Theory and Design
Gravity-Driven Water Flow in Networks: Theory and Design
ISBN: 978-1-118-00208-7
541 pages
December 2011
Gravity-driven water flow networks are a crucial method of delivering clean water to millions of people worldwide, and an essential agricultural tool. This b... | {"url":"http://www.wiley.com/WileyCDA/WileyTitle/productCd-1118002083.html","timestamp":"2014-04-20T18:33:54Z","content_type":null,"content_length":"47332","record_id":"<urn:uuid:ecddabe9-82c9-4df8-9e94-4649da9662c1>","cc-path":"CC-MAIN-2014-15/segments/1397609539066.13/warc/CC-MAIN-20140416005219-00070-ip-10-147-4-33.... |
Moduli Spaces of Gorenstein Quasi-Homogenous Surface Singularities
Seminar Room 1, Newton Institute
Gorenstein quasi-homogeneous surface singularities, studied by Dolgachev, Neumann and others, correspond to lifts of Fuchsian groups into the universal covering of PSL(2,R). I will show that the
space of Gorenstein quasi... | {"url":"http://www.newton.ac.uk/programmes/MOS/seminars/2011012510001.html","timestamp":"2014-04-17T00:52:54Z","content_type":null,"content_length":"6227","record_id":"<urn:uuid:bf8669f8-2e5e-41fc-a801-873abea259d3>","cc-path":"CC-MAIN-2014-15/segments/1398223210034.18/warc/CC-MAIN-20140423032010-00384-ip-10-147-4-33.e... |
Universality of the second mixed moment of the characteristic polynomials of the 1D Gaussian band matrices
Seminar Room 1, Newton Institute
We consider the asymptotic behavior of the second mixed moment of the characteristic polynomials of the 1D Gaussian band matrices, i.e. of the hermitian matrices $H_n$ with indepen... | {"url":"http://www.newton.ac.uk/programmes/MPA/seminars/2012092011101.html","timestamp":"2014-04-19T15:15:50Z","content_type":null,"content_length":"6340","record_id":"<urn:uuid:f2281468-5a9f-4fbe-99e5-65c1026dd0ad>","cc-path":"CC-MAIN-2014-15/segments/1397609537271.8/warc/CC-MAIN-20140416005217-00489-ip-10-147-4-33.ec... |
Evil Mad Scientist Laboratories
Fabric Klein Bottle
Klein bottles are an entertaining mathematical idea–a shape with no volume. A Klein bottle is basically a tube where the inside is connected to the outside. Making a Klein bottle in our 3D world
requires a bit of cheating to work, by adding a hole in one of the wall... | {"url":"http://www.evilmadscientist.com/2009/fabric-klein-bottle/","timestamp":"2014-04-19T01:48:37Z","content_type":null,"content_length":"32397","record_id":"<urn:uuid:db9240da-fb41-4c93-a821-e1be6575e25c>","cc-path":"CC-MAIN-2014-15/segments/1398223202774.3/warc/CC-MAIN-20140423032002-00405-ip-10-147-4-33.ec2.intern... |
Automatic differentiation
30 May, 2005
Upgrading from a previous version? - see History for changes.
We want to calculate a value f(t[1],...,t[n]) that depends on parameters t[1],...,t[n]. But, in addition, we want to calculate the first and possibly second derivatives of f(t[1],...,t[n]) with
respect to t[1],...,t[n].... | {"url":"http://www.robertnz.net/autodiff.htm","timestamp":"2014-04-19T06:53:31Z","content_type":null,"content_length":"23060","record_id":"<urn:uuid:c4399a09-8aa3-4db9-b476-97961787553f>","cc-path":"CC-MAIN-2014-15/segments/1397609536300.49/warc/CC-MAIN-20140416005216-00305-ip-10-147-4-33.ec2.internal.warc.gz"} |
Ultra-Low Leakage Arithmetic Circuits Using Symmetric and Asymmetric FinFETs
Journal of Electrical and Computer Engineering
Volume 2013 (2013), Article ID 454392, 13 pages
Research Article
Ultra-Low Leakage Arithmetic Circuits Using Symmetric and Asymmetric FinFETs
Department of Electrical and Computer Engineering, Roy... | {"url":"http://www.hindawi.com/journals/jece/2013/454392/","timestamp":"2014-04-19T14:01:58Z","content_type":null,"content_length":"155329","record_id":"<urn:uuid:a666efcb-319f-47d9-9af0-2adec178ac1f>","cc-path":"CC-MAIN-2014-15/segments/1397609537186.46/warc/CC-MAIN-20140416005217-00470-ip-10-147-4-33.ec2.internal.war... |
User David Speyer
bio website math.lsa.umich.edu/~speyer
location Ann Arbor
age 33
visits member for 4 years, 6 months
seen 3 hours ago
stats profile views 27,392
Associate Professor of Mathematics at the University of Michigan. My research interests are i... | {"url":"http://mathoverflow.net/users/297/david-speyer?tab=favorites","timestamp":"2014-04-19T00:04:40Z","content_type":null,"content_length":"55577","record_id":"<urn:uuid:e1625155-589e-4161-a409-b65683695ca3>","cc-path":"CC-MAIN-2014-15/segments/1397609535535.6/warc/CC-MAIN-20140416005215-00434-ip-10-147-4-33.ec2.int... |
Further Mathematics
A / AS Level
What is Further Mathematics?
It’s the last 5 minutes of the final qualifier and Steven Gerrard is about to take a free kick that could take England to the World Cup 2014. The crowd is crying out for him to score. What speed and
direction does he need to kick the ball?
To set the World R... | {"url":"http://www.altoncollege.ac.uk/sixth-form/finding-a-course/a-as-level/further-mathematics","timestamp":"2014-04-18T00:18:35Z","content_type":null,"content_length":"30553","record_id":"<urn:uuid:3f2af4cc-b59c-490f-8e35-7e16624b92e9>","cc-path":"CC-MAIN-2014-15/segments/1397609532374.24/warc/CC-MAIN-20140416005212... |
FHSST Physics/Work and Energy/Work
From Wikibooks, open books for an open world
To do work on an object, one must move the object by applying a force with at least a component in the direction of motion. The work done is given by
$W= F_{\|} s$
W : work done (N.m or J)
F[|] : compo... | {"url":"https://en.wikibooks.org/wiki/FHSST_Physics/Work_and_Energy/Work","timestamp":"2014-04-18T16:28:42Z","content_type":null,"content_length":"35594","record_id":"<urn:uuid:efe80d9b-1acc-4d4f-8b6b-7e6b586cb9e0>","cc-path":"CC-MAIN-2014-15/segments/1397609533957.14/warc/CC-MAIN-20140416005213-00266-ip-10-147-4-33.ec... |
What can I use to solve a general matrix?
Hi guys!
I need to solve a matrix. I have 3 equations, 3 unknowns, straightforward stuff. And I know it's invertible (doing transformations for hamiltonian dynamics, so I know they made it invertible). I know
my calculator and a ton of websites can easily solve any matrix with ... | {"url":"http://www.physicsforums.com/showthread.php?p=3566378","timestamp":"2014-04-20T03:15:47Z","content_type":null,"content_length":"29510","record_id":"<urn:uuid:0d7a477d-e46b-4cd7-be96-1ecc09c1d149>","cc-path":"CC-MAIN-2014-15/segments/1397609537864.21/warc/CC-MAIN-20140416005217-00034-ip-10-147-4-33.ec2.internal.... |
A boy of weight, W, hangs from the center of a clothesline and distorts the line so that it makes 30 degrees angles with the horizontal at each end. - WyzAnt Answers
A boy of weight, W, hangs from the center of a clothesline and distorts the line so that it makes 30 degrees angles with the horizontal at each end.
Find ... | {"url":"http://www.wyzant.com/resources/answers/15633/a_boy_of_weight_w_hangs_from_the_center_of_a_clothesline_and_distorts_the_line_so_that_it_makes_30_degrees_angles_with_the_horizontal_at_each_end","timestamp":"2014-04-23T08:33:40Z","content_type":null,"content_length":"51858","record_id":"<urn:uuid:7af68876-df44-41... |
RE: Re: st: RE: RE: Bootstrap and Technical analysis
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RE: Re: st: RE: RE: Bootstrap and Technical analysis
From "Nick Cox" <n.j.cox@durham.ac.uk>
To <statalist@hsphsun2.harvard.edu>
Subject RE: Re: st: RE: RE: Bootstrap and Technical anal... | {"url":"http://www.stata.com/statalist/archive/2008-08/msg00793.html","timestamp":"2014-04-19T07:01:45Z","content_type":null,"content_length":"8127","record_id":"<urn:uuid:956701bf-e35a-42a0-bc98-fe0f928a1323>","cc-path":"CC-MAIN-2014-15/segments/1397609536300.49/warc/CC-MAIN-20140416005216-00185-ip-10-147-4-33.ec2.int... |
1 cpy harmonics of transport along the variance ellipse major axes
Average annual cycle velocity anomalies were decomposed into components along the major and minor axes of the variance ellipses (see plot 1.f.3). A 1 cpy harmonic of the component along the major
axis was found. This combines the u and v components of v... | {"url":"http://faculty.washington.edu/kessler/noumea/ORCA/orca-transport-harm-varellipse-ampphi.html","timestamp":"2014-04-18T13:31:38Z","content_type":null,"content_length":"1169","record_id":"<urn:uuid:232560a1-6e65-45b0-a3df-bc6e08dfbdf2>","cc-path":"CC-MAIN-2014-15/segments/1397609533689.29/warc/CC-MAIN-20140416005... |
Math Forum Discussions
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Views expressed in these public forums are not endorsed by Drexel University or The Math Forum.
Topic: PUBLISHED: 80 PAGE THESIS ON THE UNIFIED THEOREM, BY THE
Replies: 3 Last Post: Mar 25, 2013 8:03 AM
... | {"url":"http://mathforum.org/kb/thread.jspa?threadID=2443233&messageID=8751412","timestamp":"2014-04-19T18:29:57Z","content_type":null,"content_length":"21968","record_id":"<urn:uuid:0d7abdc3-38c7-48d7-b669-b9f24782f381>","cc-path":"CC-MAIN-2014-15/segments/1398223206647.11/warc/CC-MAIN-20140423032006-00154-ip-10-147-4... |
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A 2.17-μF capacitor is connected to a 270-V, 110.0-Hz line. Fi... | {"url":"http://openstudy.com/updates/50bec0d9e4b0de4262a04f5b","timestamp":"2014-04-21T07:45:49Z","content_type":null,"content_length":"54032","record_id":"<urn:uuid:f243ca0f-08f0-44cc-81fe-dc53b2974478>","cc-path":"CC-MAIN-2014-15/segments/1397609539665.16/warc/CC-MAIN-20140416005219-00097-ip-10-147-4-33.ec2.internal.... |
The Perils of Floating Point
by Bruce M. Bush
Copyright (c) 1996 Lahey Computer Systems, Inc. Permission to copy is granted with acknowledgement of the source.
Many great engineering and scientific advances of recent decades would not have been possible without the floating-point capabilities of digital computers. Stil... | {"url":"http://www.lahey.com/float.htm","timestamp":"2014-04-16T07:14:11Z","content_type":null,"content_length":"20312","record_id":"<urn:uuid:3c0bb65d-3d2b-48fa-b2bd-a263aa88bbcd>","cc-path":"CC-MAIN-2014-15/segments/1397609521558.37/warc/CC-MAIN-20140416005201-00066-ip-10-147-4-33.ec2.internal.warc.gz"} |
[Tutor] least squares
Danny Yoo dyoo at hkn.eecs.berkeley.edu
Fri Dec 17 20:22:50 CET 2004
On Thu, 16 Dec 2004, mdcooper wrote:
> I am trying to get a corrolation between a large number of variables and for
> many similar equations :
> (Ca1 * xa^2) + (Ca2 * ya^2) + (Ca3 * za^2) + ... = ta
> (Cb1 * xb^2) + (Cb2 * ... | {"url":"https://mail.python.org/pipermail/tutor/2004-December/034186.html","timestamp":"2014-04-17T02:27:06Z","content_type":null,"content_length":"7457","record_id":"<urn:uuid:dcfcdaeb-a090-4895-9b71-c2fba237fa18>","cc-path":"CC-MAIN-2014-15/segments/1397609526102.3/warc/CC-MAIN-20140416005206-00353-ip-10-147-4-33.ec2... |
Are there actually any Scientists in the Sound SCIENCE forum?????/
post #16 of 79
9/25/09 at 9:52pm
Smelly -- I agree with your point that many of the papers published in AES do not use statistics properly, but worse: the correct statistical papers (and the ones by statisticians) are focused on the
A/B/X testing protoc... | {"url":"http://www.head-fi.org/t/447209/are-there-actually-any-scientists-in-the-sound-science-forum/15","timestamp":"2014-04-21T05:30:31Z","content_type":null,"content_length":"170583","record_id":"<urn:uuid:777ec610-72db-43ea-a1af-4c81a3e3bbcf>","cc-path":"CC-MAIN-2014-15/segments/1397609539493.17/warc/CC-MAIN-201404... |
st: re: r(198) error
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st: re: r(198) error
From Kit Baum <baum@bc.edu>
To statalist@hsphsun2.harvard.edu
Subject st: re: r(198) error
Date Fri, 7 Sep 2007 15:59:47 -0400
Nirina said
What I basically want to do is:
1- to run the regress... | {"url":"http://www.stata.com/statalist/archive/2007-09/msg00178.html","timestamp":"2014-04-19T12:55:44Z","content_type":null,"content_length":"7937","record_id":"<urn:uuid:b68a845f-204c-4ea1-be50-ac2d0c8618d8>","cc-path":"CC-MAIN-2014-15/segments/1398223206118.10/warc/CC-MAIN-20140423032006-00106-ip-10-147-4-33.ec2.int... |
Understanding Cabinet Diffraction
One of the most misunderstood topics in audio is the subject of diffraction. Diffraction, acoustic phase, and how listening rooms impact our reproduction of sound, based on what I see posted in many
discussions on the internet, are subjects of much confusion. In this article I will att... | {"url":"http://www.salksound.com/wp/?p=160","timestamp":"2014-04-16T15:59:20Z","content_type":null,"content_length":"28827","record_id":"<urn:uuid:3436a85a-c255-4a93-a7b2-c7526e332bca>","cc-path":"CC-MAIN-2014-15/segments/1398223204388.12/warc/CC-MAIN-20140423032004-00187-ip-10-147-4-33.ec2.internal.warc.gz"} |
Careers for Mathematics Majors
Careers for Mathematics Majors:
What can a mathematics major do for a career? Practically anything.
Mathematics provides rigorous training in thinking that is highly valued in many careers. It develops your reasoning skills, and ability to analyze complex issues, far beyond the material y... | {"url":"http://www.uaf.edu/dms/math/jobinfo/","timestamp":"2014-04-18T04:59:40Z","content_type":null,"content_length":"13316","record_id":"<urn:uuid:dbd04bc9-05f7-404f-859d-f2bd206ed032>","cc-path":"CC-MAIN-2014-15/segments/1397609532480.36/warc/CC-MAIN-20140416005212-00017-ip-10-147-4-33.ec2.internal.warc.gz"} |
Maths adventures
So, I wrote up a long-ass post about triangular numbers and how I started out thinking about them and part of why they’re so awesome. I put it behind a read more because 01. It’s long, and 02. I know
some of you hate maths (philistines!).
I also decided to write it in this sort of amusing but slightly-... | {"url":"http://booleanearth.tumblr.com/post/34013487790/maths-adventures","timestamp":"2014-04-19T12:33:00Z","content_type":null,"content_length":"45868","record_id":"<urn:uuid:1f83efe6-0cda-4119-9bc2-749a6e3afa43>","cc-path":"CC-MAIN-2014-15/segments/1398223202548.14/warc/CC-MAIN-20140423032002-00386-ip-10-147-4-33.ec... |
Physics Forums - Holomorphic Quotient Maps on Projective Space
Kreizhn Sep25-11 05:11 PM
Holomorphic Quotient Maps on Projective Space
1. The problem statement, all variables and given/known data
Let [itex] \mathbb{CP}^n [/itex] be n-dimensional complex projective space, and let [itex] \pi: \mathbb C^{n+1}\setminus\... | {"url":"http://www.physicsforums.com/printthread.php?t=533655","timestamp":"2014-04-19T12:43:32Z","content_type":null,"content_length":"5115","record_id":"<urn:uuid:45ed3194-594b-4c33-ad36-d01a50325651>","cc-path":"CC-MAIN-2014-15/segments/1398223207046.13/warc/CC-MAIN-20140423032007-00451-ip-10-147-4-33.ec2.internal.w... |
Basic Equations and Parabolic Path - Boundless Open Textbook
Basic Equations and Parabolic Path
Projectile motion is a form of motion where an object moves in a bilaterally symmetrical, parabolic path. The path that the object follows is called its trajectory. Projectile motion only occurs when
there is one force appli... | {"url":"https://www.boundless.com/physics/two-dimensional-kinematics/projectile-motion/basic-equations-and-parabolic-path/","timestamp":"2014-04-18T05:31:35Z","content_type":null,"content_length":"72256","record_id":"<urn:uuid:fa9f6485-88ac-4d9d-a235-d555580b92e3>","cc-path":"CC-MAIN-2014-15/segments/1397609532573.41/w... |
Google Answers: How to identify shipping carrier tracking numbers? (for jbf777-ga)
Hello mr_zorg
Thanks for reposting the question!
Firstly, please note: this answer is not finished until you re
satisfied with it. If you require additional
information/clarification, please ask before rating this answer.
Thank you fo... | {"url":"http://answers.google.com/answers/threadview/id/207899.html","timestamp":"2014-04-19T02:40:50Z","content_type":null,"content_length":"13992","record_id":"<urn:uuid:9b7d3525-c87a-45bb-b871-76114ade9447>","cc-path":"CC-MAIN-2014-15/segments/1397609535745.0/warc/CC-MAIN-20140416005215-00195-ip-10-147-4-33.ec2.inte... |
A proof of 2=1 that I just saw for the first time today
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Possible Answer
Update : for instance the following formula =1/(POWER(1.16;A19) - read more
In excel what does the colon between a formula mean? What does the semi colon mean in an excel formula? ... 84% - What does the semi colon mean in an excel formula? 38% - What is a colon for in excel
because i havent really got ... | {"url":"http://www.askives.com/what-does-semicolon-mean-in-excel.html","timestamp":"2014-04-20T14:23:38Z","content_type":null,"content_length":"35532","record_id":"<urn:uuid:9a769b97-84a3-4a1e-ad40-0af41dcc462e>","cc-path":"CC-MAIN-2014-15/segments/1398223206672.15/warc/CC-MAIN-20140423032006-00233-ip-10-147-4-33.ec2.i... |
Merrimack Algebra 2 Tutor
Find a Merrimack Algebra 2 Tutor
...I also boast 30 years of industry experience as an applied mathematician. I have had many recent tutoring situations with students taking algebra, calculus, and statistics. Courses I have
taught include algebra, trigonometry, precalculus, calculus, diffe... | {"url":"http://www.purplemath.com/Merrimack_Algebra_2_tutors.php","timestamp":"2014-04-20T10:48:37Z","content_type":null,"content_length":"23861","record_id":"<urn:uuid:539c5c3e-32ca-4bfd-9634-fd0913cb9cac>","cc-path":"CC-MAIN-2014-15/segments/1397609538423.10/warc/CC-MAIN-20140416005218-00117-ip-10-147-4-33.ec2.intern... |
integration, calculating surface where f(x):y^2 = ....
August 24th 2011, 06:01 AM
integration, calculating surface where f(x):y^2 = ....
Hi, I have two functions
f(x): y^2 = 2x + 4
g(x): y = x^2
Now, I need to calculate the surface using those 2 functions.
I know if f(x) were y = 2x + 4, you would s... | {"url":"http://mathhelpforum.com/calculus/186636-integration-calculating-surface-where-f-x-y-2-a-print.html","timestamp":"2014-04-23T17:20:25Z","content_type":null,"content_length":"4943","record_id":"<urn:uuid:88b6381e-1266-4e83-8644-7339dc9f361e>","cc-path":"CC-MAIN-2014-15/segments/1398223203235.2/warc/CC-MAIN-20140... |
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In one week, Kean ate a total of 8 ounces of grains at breakfa... | {"url":"http://openstudy.com/updates/4fa14197e4b029e9dc321aa3","timestamp":"2014-04-18T23:56:42Z","content_type":null,"content_length":"63083","record_id":"<urn:uuid:31eea7b7-88aa-4647-b890-59d0accfb7cd>","cc-path":"CC-MAIN-2014-15/segments/1397609535535.6/warc/CC-MAIN-20140416005215-00456-ip-10-147-4-33.ec2.internal.w... |
Meeting Details
For more information about this meeting, contact Robert Vaughan.
Title: The Skewes Number
Seminar: Algebra and Number Theory Seminar
Speaker: Roger Plymen, Southampton... | {"url":"http://www.math.psu.edu/calendars/meeting.php?id=13645","timestamp":"2014-04-16T08:18:51Z","content_type":null,"content_length":"3960","record_id":"<urn:uuid:46b151b6-12a0-4c32-a581-ab00f8131a18>","cc-path":"CC-MAIN-2014-15/segments/1397609521558.37/warc/CC-MAIN-20140416005201-00354-ip-10-147-4-33.ec2.internal.... |
Geometry: Measurements
A regular polygon, remember, is a polygon whose sides and interior angles are all congruent. To understand the formula for the area of such a polygon, some new vocabulary is necessary.
The center of a regular polygon is the point from which all the vertices are equidistant. The radius of a regula... | {"url":"http://www.sparknotes.com/math/geometry2/measurements/section6.rhtml","timestamp":"2014-04-20T23:42:11Z","content_type":null,"content_length":"52870","record_id":"<urn:uuid:40281ba0-c66a-491d-a9f3-0a13f6e300f0>","cc-path":"CC-MAIN-2014-15/segments/1397609539337.22/warc/CC-MAIN-20140416005219-00450-ip-10-147-4-3... |
Differential Equation to Transfer Function
May 12th 2010, 08:38 PM #1
May 2010
Differential Equation to Transfer Function
I have done this in a long time but is this right? I have a differential equation and I want to find the transfer function. Is that right?
r, m, and k are numbers.
Your ODE is:
$... | {"url":"http://mathhelpforum.com/differential-equations/144462-differential-equation-transfer-function.html","timestamp":"2014-04-16T08:25:18Z","content_type":null,"content_length":"50730","record_id":"<urn:uuid:29b122fd-da32-45c9-8040-97fd832b38f9>","cc-path":"CC-MAIN-2014-15/segments/1397609539705.42/warc/CC-MAIN-201... |
Posts about necklace on 360
If you put 0 beads on your necklace, there’s only one way to do so and it’s mighty boring.
Suppose you put 1 bead on your necklace. It might be purple or it might be gold, giving you two possible necklaces.
If you want to put 2 beads on your necklace, you can do so in three ways. And if you ... | {"url":"https://threesixty360.wordpress.com/tag/necklace/","timestamp":"2014-04-17T21:32:01Z","content_type":null,"content_length":"36346","record_id":"<urn:uuid:343c0afe-af42-4926-8ee2-b12cb8d78028>","cc-path":"CC-MAIN-2014-15/segments/1397609532128.44/warc/CC-MAIN-20140416005212-00407-ip-10-147-4-33.ec2.internal.warc... |
Measure length without bend ?
Re: Measure length without bend ?
SuperLynx wrote:
Suppose I have a pipe that is bent to a degree, measuring the length of the pipe from the top to the bottom at 11.76cm. I want to know the length of the pipe as if there was no bend ?
real life situation?
'And fun? If maths is fun,... | {"url":"http://mathisfunforum.com/viewtopic.php?id=20203&p=2","timestamp":"2014-04-21T07:11:24Z","content_type":null,"content_length":"45220","record_id":"<urn:uuid:21d50237-f9ba-44be-92cb-9065d82b34f6>","cc-path":"CC-MAIN-2014-15/segments/1397609539665.16/warc/CC-MAIN-20140416005219-00158-ip-10-147-4-33.ec2.internal.w... |
closed form for sequence z=z^2+c & generating function
October 3rd 2011, 09:07 PM #1
Oct 2011
hi there... hope this is in the right place, even guidance to what the particular area of maths im talking about is would be appreciated, so I can find material/books online. thanks. where can I
read about this?!
... | {"url":"http://mathhelpforum.com/advanced-algebra/189508-closed-form-sequence-z-z-2-c-generating-function.html","timestamp":"2014-04-17T22:22:13Z","content_type":null,"content_length":"34629","record_id":"<urn:uuid:7c6d073c-b43f-4b77-bf94-ba27dd56013a>","cc-path":"CC-MAIN-2014-15/segments/1397609532128.44/warc/CC-MAIN-... |
What representative examples of modules should I keep in mind?
up vote 13 down vote favorite
So here's my problem: I have no intuition for how a "generic" module over a commutative ring should behave. (I think I should never have been told "modules are like vector spaces.") The only examples
I'm really comfortable with... | {"url":"http://mathoverflow.net/questions/1827/what-representative-examples-of-modules-should-i-keep-in-mind/1835","timestamp":"2014-04-18T18:55:39Z","content_type":null,"content_length":"101382","record_id":"<urn:uuid:80ca4307-895b-40a1-8a54-0682c94705b2>","cc-path":"CC-MAIN-2014-15/segments/1397609535095.7/warc/CC-MA... |
What Is the Zenith Angle?
The zenith angle is the angle between a point of interest and the zenith — the point directly overhead. In a three-dimensional coordinate system, the zenith is the axis perpendicular to the
horizontal plane. Zenith angle is measured from a local zenith, meaning that it changes based on the loc... | {"url":"http://www.wisegeek.com/what-is-the-zenith-angle.htm","timestamp":"2014-04-19T09:38:04Z","content_type":null,"content_length":"64409","record_id":"<urn:uuid:49524f1d-e0f9-4820-bdce-5b96881a569f>","cc-path":"CC-MAIN-2014-15/segments/1398223202457.0/warc/CC-MAIN-20140423032002-00133-ip-10-147-4-33.ec2.internal.wa... |
American Mathematical Society
Bulletin Notices
AMS Hosts Congressional Briefing
James A. Yorke, Distinguished University Professor of Mathematics and Physics at the University of Maryland presented "Chaos and Avalanches in Science and Socio-Political Systems" at an AMS sponsored
Congressional briefing on December 4, 20... | {"url":"http://cust-serv@ams.org/policy/government/outreach/CongressBriefing2012","timestamp":"2014-04-21T06:14:26Z","content_type":null,"content_length":"39751","record_id":"<urn:uuid:3978e21e-63d9-4019-8315-bae674ff7337>","cc-path":"CC-MAIN-2014-15/segments/1397609539493.17/warc/CC-MAIN-20140416005219-00437-ip-10-147... |
Circle theroems.
November 6th 2008, 11:07 AM #1
Nov 2008
Circle theroems.
im lost, completely, ermm, please find enclosed is a image of my question, could you please explain what to do, and how to do it.
im lost, completely, ermm, please find enclosed is a image of my question, could you please explain what... | {"url":"http://mathhelpforum.com/geometry/58034-circle-theroems.html","timestamp":"2014-04-19T22:47:42Z","content_type":null,"content_length":"33301","record_id":"<urn:uuid:be48d110-bc1b-4cda-ae84-ad48134d5041>","cc-path":"CC-MAIN-2014-15/segments/1397609537754.12/warc/CC-MAIN-20140416005217-00302-ip-10-147-4-33.ec2.in... |
Algebra Tutors
Woburn, MA 01801
Efficient Math/Physics and Electrical Engineering Tutor/Instructor
...I tested this method thoroughly, throughout the years, take a look: I have more than ten years of tutoring high school students, from
, Geometry, Trigonometry and Pre-Calculus to Calculus, AP Physics and College level... | {"url":"http://www.wyzant.com/geo_Boston_algebra_tutors.aspx?d=20&pagesize=5&pagenum=2","timestamp":"2014-04-23T21:14:19Z","content_type":null,"content_length":"64051","record_id":"<urn:uuid:70c08b9a-1eef-4af4-a29c-383675f0b883>","cc-path":"CC-MAIN-2014-15/segments/1398223203422.8/warc/CC-MAIN-20140423032003-00387-ip-1... |
Finding the largest number in an array
Join Date
Jul 2008
Rep Power
I am writing code for an assignment. There is one last part that I can not figure out. I need to be able to find the largest item in an array. I have a parallel array and need to find the
largest number in one array list... | {"url":"http://www.java-forums.org/new-java/10710-finding-largest-number-array.html","timestamp":"2014-04-19T15:56:35Z","content_type":null,"content_length":"122711","record_id":"<urn:uuid:c31436a6-ed89-4f7e-8b88-152e191787b9>","cc-path":"CC-MAIN-2014-15/segments/1397609537271.8/warc/CC-MAIN-20140416005217-00141-ip-10-... |
Basic Probability
We think it's highly likely that you've already dealt with probability today. Did you see the weather forecast? Is there a 30% chance of rain? Did you decide not to study for your foreign language
class since you had a pop quiz yesterday? All of these predictions and decisions are based on probability... | {"url":"http://www.shmoop.com/basic-statistics-probability/probability-help.html","timestamp":"2014-04-20T00:41:08Z","content_type":null,"content_length":"41696","record_id":"<urn:uuid:399af974-60de-4fbe-97ff-5c1efa7c9ccc>","cc-path":"CC-MAIN-2014-15/segments/1398223206120.9/warc/CC-MAIN-20140423032006-00367-ip-10-147-... |
st: RE: collinear categorical variable identification
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st: RE: collinear categorical variable identification
From "David E Moore" <davem@hartman-group.com>
To statalist@hsphsun2.harvard.edu
Subject st: RE: collinear categorical variable ... | {"url":"http://www.stata.com/statalist/archive/2003-06/msg00288.html","timestamp":"2014-04-18T10:54:03Z","content_type":null,"content_length":"12013","record_id":"<urn:uuid:898e9975-e6a3-4476-bd94-72221f591575>","cc-path":"CC-MAIN-2014-15/segments/1398223204388.12/warc/CC-MAIN-20140423032004-00155-ip-10-147-4-33.ec2.in... |
MathGroup Archive: May 2001 [00334]
[Date Index] [Thread Index] [Author Index]
Re: Limit[(p*(-1 + p^n))/(-1 + p), n->Infinity]
• To: mathgroup at smc.vnet.net
• Subject: [mg28928] Re: [mg28918] Limit[(p*(-1 + p^n))/(-1 + p), n->Infinity]
... | {"url":"http://forums.wolfram.com/mathgroup/archive/2001/May/msg00334.html","timestamp":"2014-04-18T13:21:18Z","content_type":null,"content_length":"26452","record_id":"<urn:uuid:14695870-4485-4381-856b-3c34f90bc0a3>","cc-path":"CC-MAIN-2014-15/segments/1398223202457.0/warc/CC-MAIN-20140423032002-00028-ip-10-147-4-33.e... |
help in differentiatinr :(
yeah.. and thanx alot for being concern n for all ur answers
${d\over dx}\biggl((1+\cos x)^{.5} (1-\cos x)^{-.5}\biggr)$ $=.5(1+\cos x)^{-.5}(-\sin x) (1-\cos x)^{-.5}+(1+\cos x)^{.5}(-.5)(1-\cos x)^{-1.5}(\sin x)$
Keeping the function as a quotient and using quotient rule also works $u(x) = ... | {"url":"http://mathhelpforum.com/calculus/76665-help-differentiatinr.html","timestamp":"2014-04-19T13:50:11Z","content_type":null,"content_length":"51554","record_id":"<urn:uuid:c35421e8-1ed7-48d3-9284-558a527525de>","cc-path":"CC-MAIN-2014-15/segments/1397609537186.46/warc/CC-MAIN-20140416005217-00548-ip-10-147-4-33.e... |
Rational Roots Quadratic
In the quadratic equation $ax^2 + bx + c = 0$, the coefficients $a$, $b$, $c$ are non-zero integers.
Let $b = -5$. By making $a = 2$ and $c = 3$, the equation $2x^2 - 5x + 3 = 0$ has rational roots. But what is most remarkable is that it is possible to interchange these coefficients in any orde... | {"url":"http://mathschallenge.net/full/rational_roots_quadratic","timestamp":"2014-04-19T09:24:42Z","content_type":null,"content_length":"7559","record_id":"<urn:uuid:cfa882ff-cfa4-4e36-830d-0fef90d8c847>","cc-path":"CC-MAIN-2014-15/segments/1398223206647.11/warc/CC-MAIN-20140423032006-00066-ip-10-147-4-33.ec2.internal... |
Feynman vs. The Abacus
This is an excerpt from the chapter "Lucky Numbers", in Surely, You're Joking, Mr. Feynman!, Edward Hutchings ed., W. W. Norton, ISBN: 0-393-31604-1.
The story is taking place in Brazil; the narrator is Richard Feynman.
A Japanese man came into the restaurant. I had seen him before, wandering aro... | {"url":"http://www.ee.ryerson.ca/~elf/abacus/feynman.html","timestamp":"2014-04-16T16:32:04Z","content_type":null,"content_length":"5826","record_id":"<urn:uuid:b9332ac0-98cd-406b-87e5-baed524ea9d0>","cc-path":"CC-MAIN-2014-15/segments/1398223206770.7/warc/CC-MAIN-20140423032006-00102-ip-10-147-4-33.ec2.internal.warc.g... |
Matches for:
DIMACS: Series in Discrete Mathematics and Theoretical Computer Science
1999; 375 pp; hardcover
Volume: 48
ISBN-10: 0-8218-0842-7
ISBN-13: 978-0-8218-0842-9
List Price: US$91
Member Price: US$72.80
Order Code: DIMACS/48
This volume presents the proceedings from the third DIMACS workshop on "DNA Based Com... | {"url":"http://www.ams.org/bookstore?fn=20&arg1=app-ap&ikey=DIMACS-48","timestamp":"2014-04-18T16:23:20Z","content_type":null,"content_length":"17390","record_id":"<urn:uuid:f1d00217-0e88-404a-8c26-fab6b9b317e1>","cc-path":"CC-MAIN-2014-15/segments/1397609533957.14/warc/CC-MAIN-20140416005213-00238-ip-10-147-4-33.ec2.i... |
from Wiktionary, Creative Commons Attribution/Share-Alike License
• adj. Possessing dimension
Sorry, no etymologies found.
• Carl called this egoless, dimensionful area the Zone.
• In fact, you clearly don't need M_W because it is dimensionful and it must therefore drop out.
• Anyway, a large part of what you s... | {"url":"https://www.wordnik.com/words/dimensionful","timestamp":"2014-04-19T20:00:49Z","content_type":null,"content_length":"32261","record_id":"<urn:uuid:975ffae9-1248-4c10-a3b2-7d5e0928b918>","cc-path":"CC-MAIN-2014-15/segments/1397609537376.43/warc/CC-MAIN-20140416005217-00394-ip-10-147-4-33.ec2.internal.warc.gz"} |
Superintendent’s Memo #032-12
Department of Education
January 27, 2012
TO: Division Superintendents
FROM: Patricia I. Wright, Superintendent of Public Instruction
SUBJECT: Supports for Implementation of the 2009 Mathematics Standards of Learning
The following is an annotated listing of curriculum, instruction, and asse... | {"url":"http://www.doe.virginia.gov/administrators/superintendents_memos/2012/032-12.shtml","timestamp":"2014-04-17T09:58:01Z","content_type":null,"content_length":"9786","record_id":"<urn:uuid:350b8145-a36f-415a-b3e4-2717bf2416db>","cc-path":"CC-MAIN-2014-15/segments/1397609527423.39/warc/CC-MAIN-20140416005207-00654-... |
Freeman John Dyson
Born: 15 December 1923 in Crowthorne, Berkshire, England
Freeman Dyson's parents were Mildred Lucy Atkey and George Dyson. George was very talented, both as a teacher of music and as a writer on music. At the time of Freeman's birth George was teaching
music at Wellington College in Berkshire. He had... | {"url":"http://www-groups.dcs.st-and.ac.uk/~history/Printonly/Dyson.html","timestamp":"2014-04-17T12:31:30Z","content_type":null,"content_length":"18597","record_id":"<urn:uuid:fd84244e-216f-4008-beef-ca09fc2f9be8>","cc-path":"CC-MAIN-2014-15/segments/1398223202774.3/warc/CC-MAIN-20140423032002-00352-ip-10-147-4-33.ec2... |
Simplify and Rationalize
Question: For x>0, simplify the following: $<br /> \sqrt{x^4-4x^2}/x<br />$ Hint: If x<0, what is : $<br /> \sqrt{x^2}<br />$
No, rationalizing the denominator doesn't mean multiplying by a conjugate. You just multiply the numerator & denominator by the denominator itself: $\frac{m-4}{\sqrt{m-4... | {"url":"http://mathhelpforum.com/algebra/89897-simplify-rationalize-print.html","timestamp":"2014-04-20T20:07:51Z","content_type":null,"content_length":"12240","record_id":"<urn:uuid:a3822941-50af-4e3c-813e-f6b1ac63ca95>","cc-path":"CC-MAIN-2014-15/segments/1397609539066.13/warc/CC-MAIN-20140416005219-00315-ip-10-147-4... |
MathGroup Archive: January 1996 [00066]
[Date Index] [Thread Index] [Author Index]
Complex Default
• To: mathgroup at smc.vnet.net
• Subject: [mg3031] Complex Default
• From: evans at gte.net (Mark Evans)
• Date: Wed, 24 Jan 1996 03:3... | {"url":"http://forums.wolfram.com/mathgroup/archive/1996/Jan/msg00066.html","timestamp":"2014-04-18T00:52:54Z","content_type":null,"content_length":"39667","record_id":"<urn:uuid:ea8e2ebd-0c2a-4945-aaf4-68678914fcce>","cc-path":"CC-MAIN-2014-15/segments/1398223206672.15/warc/CC-MAIN-20140423032006-00432-ip-10-147-4-33.... |
The boundedness of penalty parameters in an augmented Lagrangian method with lower level constraints, Optim. Methods Softw
, 2012
"... We establish local convergence and rate of convergence of the classical augmented Lagrangian algorithm under the sole assumption that the dual starting point is close to a multiplier sa... | {"url":"http://citeseerx.ist.psu.edu/showciting?cid=10666965","timestamp":"2014-04-19T20:46:44Z","content_type":null,"content_length":"28050","record_id":"<urn:uuid:2076090c-b04b-4d48-b17d-8842ae77a804>","cc-path":"CC-MAIN-2014-15/segments/1397609537376.43/warc/CC-MAIN-20140416005217-00216-ip-10-147-4-33.ec2.internal.w... |
Chapter 15 - Locus
Chapter 15 - Locus
Locus is a very interesting topic in geometry, although not taught in all schools. A locus is defined as follows:
In mathematics, a locus (Latin for "place", plural loci) is a collection of po... | {"url":"http://mathforum.org/sanders/exploringandwritinggeometry/locus.htm","timestamp":"2014-04-16T06:09:15Z","content_type":null,"content_length":"11117","record_id":"<urn:uuid:742d6afc-0872-40fe-aca4-35a158c39e5a>","cc-path":"CC-MAIN-2014-15/segments/1398223202774.3/warc/CC-MAIN-20140423032002-00611-ip-10-147-4-33.e... |
Mplus Discussion >> LCA and Multiple Imputed Datasets
Jon Heron posted on Monday, July 17, 2006 - 7:05 am
I've just fitted a 5-class LCA model on 10 imputed datasets.
The results are nonsense.
I think that the reason for this is that
"Parameter estimates are averaged over the set of analyses"
means that the resulting p... | {"url":"http://www.statmodel.com/cgi-bin/discus/discus.cgi?pg=next&topic=22&page=1405","timestamp":"2014-04-18T08:06:25Z","content_type":null,"content_length":"55825","record_id":"<urn:uuid:ea5bde3e-31e1-4e72-968c-e21304961d72>","cc-path":"CC-MAIN-2014-15/segments/1398223206647.11/warc/CC-MAIN-20140423032006-00171-ip-1... |
Compactly Supported De Rham Cohomology
Since we’ve seen that all contractible spaces have trivial de Rham cohomology, we can’t use that tool to tell them apart. Instead, we introduce de Rham cohomology with compact support. This is just
like the regular version, except we only use differential forms with compact suppor... | {"url":"https://unapologetic.wordpress.com/2011/12/06/drmathochist/","timestamp":"2014-04-18T20:47:06Z","content_type":null,"content_length":"83620","record_id":"<urn:uuid:72b579df-1ad1-4352-87bc-60efd401a003>","cc-path":"CC-MAIN-2014-15/segments/1397609535095.9/warc/CC-MAIN-20140416005215-00498-ip-10-147-4-33.ec2.inte... |
Patent US20030078867 - Enhancing utility and diversifying model risk in a portfolio optimization framework
[0025] A mechanism is described for diversifying model risk. Such uncertainty/risk is inherent in the mathematical models and the historical data employed by portfolio optimizers, for example. The
diversification ... | {"url":"http://www.google.com/patents/US20030078867?dq=6978253","timestamp":"2014-04-25T03:26:34Z","content_type":null,"content_length":"149060","record_id":"<urn:uuid:ee3600a7-0e80-4d85-9e1a-8febd4d13799>","cc-path":"CC-MAIN-2014-15/segments/1398223207985.17/warc/CC-MAIN-20140423032007-00489-ip-10-147-4-33.ec2.interna... |
Two dimensional pattern formation in a chemotactic system
Myerscough, M. R. and Maini, P. K. and Murray, J. D. and Winters, K. H. (1990) Two dimensional pattern formation in a chemotactic system. In: Dynamics of Complex Interconnected Biological Systems. n/
a, n/a (n/a). Birkhauser, Boston, USA, pp. 65-83. ISBN n/a
Che... | {"url":"http://eprints.maths.ox.ac.uk/525/","timestamp":"2014-04-17T12:37:17Z","content_type":null,"content_length":"15828","record_id":"<urn:uuid:4778729a-2fad-483f-bf8e-7a81bed10555>","cc-path":"CC-MAIN-2014-15/segments/1397609530131.27/warc/CC-MAIN-20140416005210-00602-ip-10-147-4-33.ec2.internal.warc.gz"} |
Heath, History p. 354: Proclus (410-485, an Athenian philosopher, head of the Platonic school) on Eucl. I, p. 68-20:
Not much younger than these is Euclid, who put together the Elements, collecting many of Eudoxus's theorems, perfecting many of Theaetetus's, and also bringing to irrefragable demonstration
... | {"url":"http://mathforum.org/geometry/wwweuclid/bio.htm","timestamp":"2014-04-19T22:35:59Z","content_type":null,"content_length":"5083","record_id":"<urn:uuid:ca67bd11-2a17-4f3e-a1d4-5d60cbdba911>","cc-path":"CC-MAIN-2014-15/segments/1397609537754.12/warc/CC-MAIN-20140416005217-00427-ip-10-147-4-33.ec2.internal.warc.gz... |
Homework Help
Posted by jasmine on Friday, December 22, 2006 at 9:49pm.
how would i find an equation of a line that goes through points(1,6) and (3,10)??
A straight line is
Substitute the points to make two equations.
Two equations; two unknowns, m and b.
Solve for m and b, then plug back into y = mx + b. That will the... | {"url":"http://www.jiskha.com/display.cgi?id=1166842151","timestamp":"2014-04-16T17:57:02Z","content_type":null,"content_length":"9013","record_id":"<urn:uuid:deec5a14-2f49-4b63-a064-9f582fc2469e>","cc-path":"CC-MAIN-2014-15/segments/1398223206120.9/warc/CC-MAIN-20140423032006-00343-ip-10-147-4-33.ec2.internal.warc.gz"... |
Example 1.4.5:
There are several reasons, many of which are explored in detail in the next chapters. Here are a few of them (which may use terms we are not yet familiar with).
• A simple equation like x^2 - 9 = 0 does have a solution in Q, but another, just as simple equation x^2 - 2 = 0 does not have a solution in Q... | {"url":"http://www.mathcs.org/analysis/reals/logic/answers/reasonr.html","timestamp":"2014-04-20T11:20:13Z","content_type":null,"content_length":"6356","record_id":"<urn:uuid:eeb41bef-4031-450f-bb10-78b9576c7679>","cc-path":"CC-MAIN-2014-15/segments/1397609538423.10/warc/CC-MAIN-20140416005218-00514-ip-10-147-4-33.ec2.... |
Posts from December 2008 on The Unapologetic Mathematician
Another grading day, another straightforward post. It should come as no surprise that the collection of intertwining maps between any two representations forms a vector space.
Let’s fix representations $\rho:A\rightarrow\mathrm{End}(V)$ and $\sigma:A\rightarrow... | {"url":"http://unapologetic.wordpress.com/2008/12/page/2/","timestamp":"2014-04-17T03:57:16Z","content_type":null,"content_length":"85219","record_id":"<urn:uuid:fc0476b5-c2ef-4cd3-ae8f-be1f8583ba63>","cc-path":"CC-MAIN-2014-15/segments/1398223202774.3/warc/CC-MAIN-20140423032002-00542-ip-10-147-4-33.ec2.internal.warc.... |
Double -> CDouble, realToFrac doesn't work
Dylan Thurston dpt at lotus.bostoncoop.net
Fri Nov 5 06:59:12 EST 2004
On Thu, Nov 04, 2004 at 08:32:52PM +0100, Sven Panne wrote:
> It's an old thread, but nothing has really happened yet, so I'd like to
> restate and expand the question: What should the behaviour of toRation... | {"url":"http://www.haskell.org/pipermail/glasgow-haskell-users/2004-November/007378.html","timestamp":"2014-04-20T19:27:47Z","content_type":null,"content_length":"4233","record_id":"<urn:uuid:8b074276-dbb5-47dd-a49e-0fc36d182d85>","cc-path":"CC-MAIN-2014-15/segments/1397609539066.13/warc/CC-MAIN-20140416005219-00476-ip... |
Below are the first 10 and last 10 pages of uncorrected machine-read text (when available) of this chapter, followed by the top 30 algorithmically extracted key phrases from the chapter as a whole.
Intended to provide our own search engines and external engines with highly rich, chapter-representative searchable text o... | {"url":"http://books.nap.edu/openbook.php?record_id=2125&page=515","timestamp":"2014-04-21T15:27:36Z","content_type":null,"content_length":"87652","record_id":"<urn:uuid:df2f129e-5ae4-4ea4-bbe5-77fb9b657633>","cc-path":"CC-MAIN-2014-15/segments/1397609540626.47/warc/CC-MAIN-20140416005220-00144-ip-10-147-4-33.ec2.inter... |
DMOZ - Science: Math: Logic and Foundations: Nonstandard Logics and Extensions: Modal Logic
[ ] [Search] [the entire directory ]
• The Calculus of Structures - Modal Logics - Several normal propositional modal logics are systematically pre... | {"url":"http://www.dmoz.org/Science/Math/Logic_and_Foundations/Nonstandard_Logics_and_Extensions/Modal_Logic/","timestamp":"2014-04-20T18:57:18Z","content_type":null,"content_length":"20923","record_id":"<urn:uuid:8a3f2765-9710-4e38-9ef2-bbfe2baaf1c0>","cc-path":"CC-MAIN-2014-15/segments/1397609539066.13/warc/CC-MAIN-2... |
Curriculum Overview — Franklin & Marshall
The study of mathematics is a hallmark of enlightened society, as it has been for millennia. Mathematics helps us understand our world and ourselves, and it is fun.
Mathematics is one of the oldest of the liberal arts. The study of mathematics has been used for centuries to tra... | {"url":"http://www.fandm.edu/math/curriculum","timestamp":"2014-04-21T07:08:15Z","content_type":null,"content_length":"24098","record_id":"<urn:uuid:c33fc3ef-83c6-4225-bd68-e49dfe15c33a>","cc-path":"CC-MAIN-2014-15/segments/1398223211700.16/warc/CC-MAIN-20140423032011-00215-ip-10-147-4-33.ec2.internal.warc.gz"} |
Wrestling with data
I'll suggest those who haven't been, join me in keeping an eye on a series of posts that Ron Broberg is doing over at
The Whiteboard
. As befits a whiteboard, he's showing a lot of the details that get cleaned out of most final publications, even on blogs. The topic at hand is looking at the tempera... | {"url":"http://moregrumbinescience.blogspot.com/2011/01/wrestling-with-data.html","timestamp":"2014-04-17T00:51:25Z","content_type":null,"content_length":"104679","record_id":"<urn:uuid:df9de264-c43a-4d40-9c7c-783f819c27c0>","cc-path":"CC-MAIN-2014-15/segments/1397609526102.3/warc/CC-MAIN-20140416005206-00184-ip-10-147... |
[FOM] large chains in the power set of the reals
Liang Yu yuliang.nju at gmail.com
Thu Oct 9 05:11:50 EDT 2008
This question was circulated by Terwijn at LCR 2007 Argentina. The question
is motivated by the study in M-degree.
I think that it is still open. Actually I tried from time to time but fails.
What I know are:
... | {"url":"http://www.cs.nyu.edu/pipermail/fom/2008-October/013073.html","timestamp":"2014-04-20T18:47:00Z","content_type":null,"content_length":"4422","record_id":"<urn:uuid:46f21a97-d85e-418a-933d-65b89576a9a1>","cc-path":"CC-MAIN-2014-15/segments/1397609539066.13/warc/CC-MAIN-20140416005219-00491-ip-10-147-4-33.ec2.int... |
What Good Are Dot Products?
What Good Are Dot Products?
• The dot product formula is easy to compute and gives you information about the angle between vectors.
• Many times you don't need an exact angle - it's often enough to know... | {"url":"http://mathforum.org/~klotz/Vectors/why.dot.prods.html","timestamp":"2014-04-19T23:22:48Z","content_type":null,"content_length":"1910","record_id":"<urn:uuid:e7d80396-bf41-47d1-826a-5df525243511>","cc-path":"CC-MAIN-2014-15/segments/1397609537754.12/warc/CC-MAIN-20140416005217-00239-ip-10-147-4-33.ec2.internal.... |
Happy Pi Day [Archive] - Catalyst Athletics Forums
Patrick Donnelly
03-14-2009, 12:44 PM
Who could let 3/14 pass by without wishing everyone a happy pi day?
This is a somewhat special day for me in particular, since back in eighth grade, I calculated some 1083 digits of pi with an algorithm I developed (repeatedly mak... | {"url":"http://www.catalystathletics.com/forum/archive/index.php?t-4025.html","timestamp":"2014-04-20T06:20:08Z","content_type":null,"content_length":"6122","record_id":"<urn:uuid:51057d49-224f-438f-a095-8ee3d82d58e2>","cc-path":"CC-MAIN-2014-15/segments/1397609538022.19/warc/CC-MAIN-20140416005218-00489-ip-10-147-4-33... |
Danville, CA Geometry Tutor
Find a Danville, CA Geometry Tutor
...My tutoring methods vary student-by-student, but I specialize in breaking down problems and asking questions to guide the student toward discovering and truly understanding concepts which
helps with retention and effective test-taking. I take pride i... | {"url":"http://www.purplemath.com/danville_ca_geometry_tutors.php","timestamp":"2014-04-16T07:55:20Z","content_type":null,"content_length":"24140","record_id":"<urn:uuid:b2565b59-46c8-47c4-8b2b-95ca55ef1c18>","cc-path":"CC-MAIN-2014-15/segments/1397609521558.37/warc/CC-MAIN-20140416005201-00609-ip-10-147-4-33.ec2.inter... |
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4. Solve the following. In ABC, AB = CB, mABC = 4x – 3, and mC... | {"url":"http://openstudy.com/updates/50c2f2a4e4b0c673d53d7180","timestamp":"2014-04-18T14:01:00Z","content_type":null,"content_length":"60909","record_id":"<urn:uuid:9e296a27-106f-42a5-b3dc-20a3e9b9ef6e>","cc-path":"CC-MAIN-2014-15/segments/1397609533689.29/warc/CC-MAIN-20140416005213-00340-ip-10-147-4-33.ec2.internal.... |
Martins Creek Calculus Tutor
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...In my free time, I like to play with my pet chickens, play Minecraft, code up websites, and write sci-fi creative stories. I participate in NaNoWriMo every year! ** NOTE: I can't travel farther
than 10 miles to meet with you, due to an increase in ... | {"url":"http://www.purplemath.com/Martins_Creek_Calculus_tutors.php","timestamp":"2014-04-16T07:56:43Z","content_type":null,"content_length":"24123","record_id":"<urn:uuid:a2db048c-9969-4d32-aa7f-5114dd54d15f>","cc-path":"CC-MAIN-2014-15/segments/1397609521558.37/warc/CC-MAIN-20140416005201-00306-ip-10-147-4-33.ec2.int... |
Retsil Algebra Tutor
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...I have passed the WyzAnt Algebra 2 quiz and am applying to grad schools to be a math teacher full time. In my personal studies I have completed math classes through calculus two. I have
completed the WyzAnt geometry qualification quiz.
4 Subjects: including alge... | {"url":"http://www.purplemath.com/Retsil_Algebra_tutors.php","timestamp":"2014-04-17T07:14:38Z","content_type":null,"content_length":"23538","record_id":"<urn:uuid:cf687d90-0999-4a79-a6fc-0398aa86dd9a>","cc-path":"CC-MAIN-2014-15/segments/1398223206147.1/warc/CC-MAIN-20140423032006-00552-ip-10-147-4-33.ec2.internal.war... |
: Massachusetts
Local History: Massachusetts
Author Title Edition Format Price Puborg
1620: Charter of New England; Nov3 162... | {"url":"http://digitalbookindex.com/_search/search010hstregionalmassachusettsa.asp","timestamp":"2014-04-17T03:48:38Z","content_type":null,"content_length":"49766","record_id":"<urn:uuid:ab3fe73d-af59-43a0-8906-0c7719c82057>","cc-path":"CC-MAIN-2014-15/segments/1397609526252.40/warc/CC-MAIN-20140416005206-00478-ip-10-1... |
What is Vedic Maths?
To us, Vedic Mathematics is more than just speed maths skills! It’s something very enchanting. It gives us an adrenaline rush each time we teach this to a group of students anywhere on the globe. We
are still awed by the magnitude and the impact which these simple mathematical teachings can have. T... | {"url":"http://www.vedicmathsindia.org/vedic-maths-network/","timestamp":"2014-04-17T00:48:43Z","content_type":null,"content_length":"58371","record_id":"<urn:uuid:ce06c832-4583-43e4-8460-dd6bd27f0a34>","cc-path":"CC-MAIN-2014-15/segments/1397609526102.3/warc/CC-MAIN-20140416005206-00639-ip-10-147-4-33.ec2.internal.war... |
count/display non-repeated element of array
count/display non-repeated element of array
hi guys
I'm working of self-study project that needs to count how many an element of an array is repeated. And print out result.
I've been asking myself whether there is a smarter way doing this. Can you please help?
... | {"url":"http://cboard.cprogramming.com/cplusplus-programming/104946-count-display-non-repeated-element-array-printable-thread.html","timestamp":"2014-04-16T13:11:54Z","content_type":null,"content_length":"21222","record_id":"<urn:uuid:8c246337-136e-475e-802d-c0d314784030>","cc-path":"CC-MAIN-2014-15/segments/1397609523... |
[Haskell-cafe] Restricted type classes
wren ng thornton wren at freegeek.org
Sat Sep 4 03:40:49 EDT 2010
On 9/3/10 12:16 AM, Ivan Lazar Miljenovic wrote:
> 1) How should I name the kind * versions? For example, the kind *
> version of Functor is currently called Mappable with a class method of
> rigidMap. What should... | {"url":"http://www.haskell.org/pipermail/haskell-cafe/2010-September/083102.html","timestamp":"2014-04-18T07:19:34Z","content_type":null,"content_length":"8130","record_id":"<urn:uuid:18870379-0d1d-43d3-8d8c-91473f410be1>","cc-path":"CC-MAIN-2014-15/segments/1397609532573.41/warc/CC-MAIN-20140416005212-00443-ip-10-147-... |
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Prove 3n+ 20 < 3^n
• 11 months ago
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Bes... | {"url":"http://openstudy.com/updates/5184860fe4b0bc9e008a259d","timestamp":"2014-04-19T10:14:05Z","content_type":null,"content_length":"32503","record_id":"<urn:uuid:5ce4cff5-9936-41df-b4e2-c367c7e3131a>","cc-path":"CC-MAIN-2014-15/segments/1398223203841.5/warc/CC-MAIN-20140423032003-00488-ip-10-147-4-33.ec2.internal.w... |
Combo Market Preview
20 Monday Aug 2012
Posted in DAGGRE
At UAI last Friday, Robin Hanson gave a walkthrough of the new Markov Engine. Here is a subset of the screenshots he used:
The new site still lets you make regular edits
Just ignore the “Current Assumptions Box (CAB)” in the top left, select a question in the ... | {"url":"http://blog.daggre.org/2012/08/20/combo-market-preview/","timestamp":"2014-04-17T12:29:12Z","content_type":null,"content_length":"92499","record_id":"<urn:uuid:04109c7c-f884-441e-9eb0-fef3ccfbcb55>","cc-path":"CC-MAIN-2014-15/segments/1397609530131.27/warc/CC-MAIN-20140416005210-00549-ip-10-147-4-33.ec2.interna... |
Two Dimensional Range Query
Find all points in the plane, given bounds in x and/or y. I know that the solution for bounds given in x AND y is hard, but efficient solutions exist for x OR y, or even xmin < x < xmax AND ymin < y.
Can somebody add some references? -- Gunnar Zarncke Some solutions are quadtrees, k-d trees ... | {"url":"http://c2.com/cgi/wiki?TwoDimensionalRangeQuery","timestamp":"2014-04-17T18:55:54Z","content_type":null,"content_length":"2766","record_id":"<urn:uuid:f5fa9dbb-22e5-4667-ba2f-adf35072abf3>","cc-path":"CC-MAIN-2014-15/segments/1397609530895.48/warc/CC-MAIN-20140416005210-00185-ip-10-147-4-33.ec2.internal.warc.gz... |
Continuity Question
February 3rd 2009, 02:42 AM
Continuity Question
4. Let f : R -> R be a function satisfying
f(x + y) = f(x) + f(y) for any x, y in R.
Using elementary algebra prove that f(0) = 0 and f(−x) = −f(x) for every x;
by induction prove that f(nx) = nf(x) for every x and every natural number ... | {"url":"http://mathhelpforum.com/advanced-math-topics/71513-continuity-question-print.html","timestamp":"2014-04-20T15:57:50Z","content_type":null,"content_length":"7169","record_id":"<urn:uuid:e87141be-8be4-4402-8e9b-82a24e35d7bc>","cc-path":"CC-MAIN-2014-15/segments/1397609538824.34/warc/CC-MAIN-20140416005218-00130-... |
The Exponential Curve
Monday, November 23, 2009
Michelle Longosz, our former photo teacher, always takes amazing department photos for us each year. Here is the radical math department.
Posted by Dan Wekselgreene 7 comments Links to this post
Labels: fun
Sunday, November 15, 2009
Ever since I first saw this xkcd... | {"url":"http://exponentialcurve.blogspot.com/2009_11_01_archive.html","timestamp":"2014-04-16T22:20:30Z","content_type":null,"content_length":"72670","record_id":"<urn:uuid:592dba22-0274-484b-bcc8-0ee395e25cb0>","cc-path":"CC-MAIN-2014-15/segments/1398223202548.14/warc/CC-MAIN-20140423032002-00217-ip-10-147-4-33.ec2.in... |
Power Tip 56: Estimate PWB interconnect inductance | EE Times
Power Tips
Power Tip 56: Estimate PWB interconnect inductance
Printed wiring board (PWB) interconnect inductance can make or break the performance of a power supply. A large interconnect inductance can raise the high-frequency impedance of a gate drive circu... | {"url":"http://www.eetimes.com/author.asp?section_id=183&doc_id=1280482","timestamp":"2014-04-17T04:16:19Z","content_type":null,"content_length":"138110","record_id":"<urn:uuid:f9ff574e-6eab-4aee-bcda-75e14d4656c5>","cc-path":"CC-MAIN-2014-15/segments/1397609539066.13/warc/CC-MAIN-20140416005219-00502-ip-10-147-4-33.ec... |
Gyroscopic precession
There have been some interesting things on the interwebs, lately, about rotation, gyroscopes, precession, and helicoptors (all of it brought to my attention, or literally done by, Derek Muller of
Veritasium fame). It got me thinking about the modeling I’ve done with my students, using Mathematica ... | {"url":"http://arundquist.wordpress.com/2012/05/26/gyroscopic-precession/","timestamp":"2014-04-19T22:17:43Z","content_type":null,"content_length":"74534","record_id":"<urn:uuid:59a3bf42-d2da-4cf3-a872-f834d0d12405>","cc-path":"CC-MAIN-2014-15/segments/1398223210034.18/warc/CC-MAIN-20140423032010-00534-ip-10-147-4-33.e... |
Measure Liquid Flow Using the Equation of Continuity
In physics, if a fluid is flowing at a certain speed at a certain point in a system of pipes, you can predict what its speed will be at another point by using the equation of continuity. Because the
mass of the fluid is neither created nor destroyed, if mass moves aw... | {"url":"http://www.dummies.com/how-to/content/measure-liquid-flow-using-the-equation-of-continui.navId-407029.html","timestamp":"2014-04-19T07:30:24Z","content_type":null,"content_length":"56584","record_id":"<urn:uuid:249a279d-b9e0-4511-ad13-0623f2165f84>","cc-path":"CC-MAIN-2014-15/segments/1397609536300.49/warc/CC-M... |
Somers, WI Geometry Tutor
Find a Somers, WI Geometry Tutor
...I make sure I understand the need of the students and help them with patient. This way I create a desire to learn math rather than have to learn it. For example: I would teach the basic
Multiplication facts by memorizing them in a fun musical rhymes.
1... | {"url":"http://www.purplemath.com/somers_wi_geometry_tutors.php","timestamp":"2014-04-17T07:55:10Z","content_type":null,"content_length":"23904","record_id":"<urn:uuid:b1321241-afb6-4d52-9c94-78eba7f798e1>","cc-path":"CC-MAIN-2014-15/segments/1398223202774.3/warc/CC-MAIN-20140423032002-00497-ip-10-147-4-33.ec2.internal... |
The basics of capacitance.
If we take two metal plates, separate them with a dielectric (insulator), and apply a DC voltage between the plates, current will not be able to cross the dielectric. However, a surplus of electrons
will build up on the plate connected to the negative terminal of the voltage source, and short... | {"url":"http://ecmweb.com/content/basics-capacitance?page=1","timestamp":"2014-04-18T21:45:30Z","content_type":null,"content_length":"126783","record_id":"<urn:uuid:03950331-830b-453a-9a7b-aacf45229a8d>","cc-path":"CC-MAIN-2014-15/segments/1397609535095.9/warc/CC-MAIN-20140416005215-00528-ip-10-147-4-33.ec2.internal.wa... |