content stringlengths 86 994k | meta stringlengths 288 619 |
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Talk in Taiwan
I’m currently at the National Center for Theoretical Sciences, Math Division, on the campus of the National Tsing Hua University, Hsinchu for the 2013 Conference on Mathematical Physiology. The NCTS
is perhaps the best run institution I’ve ever visited. They have made my stay extremely comfortable and c... | {"url":"http://sciencehouse.wordpress.com/2013/11/01/talk-in-taiwan/","timestamp":"2014-04-18T00:13:53Z","content_type":null,"content_length":"39267","record_id":"<urn:uuid:fdf64228-82b6-4ef6-a027-7c45df79808a>","cc-path":"CC-MAIN-2014-15/segments/1397609532374.24/warc/CC-MAIN-20140416005212-00638-ip-10-147-4-33.ec2.in... |
Connectivity Of Graphs
matt grime
It is impossible to answer the question without you saying more about the original graph. Given a "star graph" ie one central node and all vertices rays from it, then any subgraph must be connected,
given another graph this will almost certainly fail to be true.
Hi matt
The problem can... | {"url":"http://www.physicsforums.com/showthread.php?t=40676","timestamp":"2014-04-19T15:19:22Z","content_type":null,"content_length":"28726","record_id":"<urn:uuid:e46a0813-044a-47a2-96e3-5baf48fdf446>","cc-path":"CC-MAIN-2014-15/segments/1397609537271.8/warc/CC-MAIN-20140416005217-00413-ip-10-147-4-33.ec2.internal.war... |
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Here's the question you clicked on:
Write an inequality for the sentence. Use x for the variable. ... | {"url":"http://openstudy.com/updates/50aa572ae4b064039cbd3086","timestamp":"2014-04-16T10:38:09Z","content_type":null,"content_length":"48948","record_id":"<urn:uuid:2e1afb5d-fba1-4c1d-9f09-620e08b187b7>","cc-path":"CC-MAIN-2014-15/segments/1398223206120.9/warc/CC-MAIN-20140423032006-00620-ip-10-147-4-33.ec2.internal.w... |
The professional development I attended over the last few weeks was really good for a few reasons:
1. the presenter teaches math and works with kids on a regular basis (she knows what it's like to teach math right now)
2. it was relevant (she asked what topics we were currently working on, visited our classes to see fi... | {"url":"http://drawingonmath.blogspot.com/2012_04_01_archive.html","timestamp":"2014-04-19T14:29:01Z","content_type":null,"content_length":"139673","record_id":"<urn:uuid:f3a07efa-bb79-48d1-8a27-f4a3894ec558>","cc-path":"CC-MAIN-2014-15/segments/1397609537271.8/warc/CC-MAIN-20140416005217-00348-ip-10-147-4-33.ec2.inter... |
Why is Zero Not a Natural Number?
Date: 03/14/2001 at 00:28:33
From: Laura
Subject: Why is Zero not considered a natural number?
I don't understand why zero is not considered to be a natural number.
Natural numbers are our typical counting numbers and I have learned
that in mathematics we count beginning at zero. Corre... | {"url":"http://mathforum.org/library/drmath/view/57186.html","timestamp":"2014-04-17T19:38:58Z","content_type":null,"content_length":"8081","record_id":"<urn:uuid:703659ff-37f6-4650-87e8-035651541fb2>","cc-path":"CC-MAIN-2014-15/segments/1397609539776.45/warc/CC-MAIN-20140416005219-00586-ip-10-147-4-33.ec2.internal.war... |
Question on skew lines
December 13th 2010, 02:37 PM
Question on skew lines
The question is attached (#1, parts a and b). I have no idea how to do part b and as for part a. I don't remember what I did but when I try to think about the problem: I see that to find that the
lines do not intersect I need to find tha... | {"url":"http://mathhelpforum.com/advanced-algebra/166152-question-skew-lines-print.html","timestamp":"2014-04-23T20:20:24Z","content_type":null,"content_length":"7132","record_id":"<urn:uuid:d932153c-a19a-4182-9619-08791b7be76d>","cc-path":"CC-MAIN-2014-15/segments/1398223203422.8/warc/CC-MAIN-20140423032003-00521-ip-1... |
Avogadros Law
Avogadro's Law proposed by Amedeo Avogadro
States that under equal conditions of temperature and pressure, equal volumes of gases contain an equal number of molecules.
This hypothesis was n... | {"url":"http://www.rsc.org/chemsoc/timeline/pages/1811.html","timestamp":"2014-04-16T19:08:28Z","content_type":null,"content_length":"37292","record_id":"<urn:uuid:cc33e0c7-a9ee-4305-a7f5-f530449e2117>","cc-path":"CC-MAIN-2014-15/segments/1397609524644.38/warc/CC-MAIN-20140416005204-00589-ip-10-147-4-33.ec2.internal.wa... |
Probability Help
November 19th 2012, 06:20 PM #1
Nov 2012
The reading speed of a sixth grade student is normally distributed with a mean speed of 125 words per minute and a standard deviation of 24 words per minute.
a) what is the probability that a randomly selected sixth grade student reads less than 100 ... | {"url":"http://mathhelpforum.com/statistics/208022-probability-help.html","timestamp":"2014-04-21T02:07:24Z","content_type":null,"content_length":"35157","record_id":"<urn:uuid:01ba6460-6f10-4ec4-b58e-e80142c928cd>","cc-path":"CC-MAIN-2014-15/segments/1397609539447.23/warc/CC-MAIN-20140416005219-00408-ip-10-147-4-33.ec... |
Riemann integrable, function
April 15th 2009, 06:27 PM #1
Mar 2009
Riemann integrable, function
Suppose that $f:[a,b] \rightarrow \mathbb{R}$ is a Riemann integrable on $[a,b]$ and $f(x) \geq 0$ for all $x \in [a,b]$. Prove that $\sqrt{f}$ is Riemann integrable on $[a,b]$.
Relevant Theorems & Definitions
... | {"url":"http://mathhelpforum.com/differential-geometry/83971-riemann-integrable-function.html","timestamp":"2014-04-18T19:19:54Z","content_type":null,"content_length":"38083","record_id":"<urn:uuid:582bfeca-dcfb-4965-afdf-df19ede06d03>","cc-path":"CC-MAIN-2014-15/segments/1397609535095.7/warc/CC-MAIN-20140416005215-001... |
Special Relativity #3
December 7th 2009, 01:51 PM #1
Junior Member
Nov 2009
Special Relativity #3
The captain of a the spaceship Red Dwarf is travelling directly towards Earth at a speed of 0.72c relative to the planet. At the same time the spaceship Soylent Green is flying directly away from
Earth, directl... | {"url":"http://mathhelpforum.com/math-topics/119160-special-relativity-3-a.html","timestamp":"2014-04-17T23:45:57Z","content_type":null,"content_length":"29177","record_id":"<urn:uuid:a9217c21-bb8f-437b-b10b-3e2f4549231e>","cc-path":"CC-MAIN-2014-15/segments/1397609532128.44/warc/CC-MAIN-20140416005212-00414-ip-10-147-... |
Welcome to the Island of Knights, Knaves, and Sir Mix-a-lot! There are a few things you should know about this island:
• Knights always tell the truth
• Knaves always lie
• There is exactly one Knight named “Sir Mix-a-lot”. Like every other knight, he cannot lie.
• This island is one of a chain of islands conta... | {"url":"http://kevinmcgladdery.com/","timestamp":"2014-04-20T10:46:50Z","content_type":null,"content_length":"59887","record_id":"<urn:uuid:edd5b660-5d19-481a-b4ab-d71df62e9906>","cc-path":"CC-MAIN-2014-15/segments/1397609538423.10/warc/CC-MAIN-20140416005218-00134-ip-10-147-4-33.ec2.internal.warc.gz"} |
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Here's the question you clicked on:
The volume of a can is 28.3 cubic inches (in.^3). If the radiu... | {"url":"http://openstudy.com/updates/51020e10e4b0ad57a5625881","timestamp":"2014-04-16T08:02:55Z","content_type":null,"content_length":"823519","record_id":"<urn:uuid:b227883e-f6d1-4540-bcf7-4b51bed8b355>","cc-path":"CC-MAIN-2014-15/segments/1397609521558.37/warc/CC-MAIN-20140416005201-00459-ip-10-147-4-33.ec2.internal... |
[Agda] Weird behaviour with record normalisation
Andreas Abel andreas.abel at ifi.lmu.de
Fri Nov 12 14:14:36 CET 2010
Ah, ok, now I see what you mean. This seems to be a bug, subject
reduction is broken. Simplifying your example...
{-# OPTIONS --show-implicit #-}
module Issue361 where
A : Set
a b : A
F : A -... | {"url":"https://lists.chalmers.se/pipermail/agda/2010/002459.html","timestamp":"2014-04-20T18:37:35Z","content_type":null,"content_length":"6660","record_id":"<urn:uuid:713482bb-deab-4769-a9f0-b12c609a5a5f>","cc-path":"CC-MAIN-2014-15/segments/1397609539066.13/warc/CC-MAIN-20140416005219-00088-ip-10-147-4-33.ec2.intern... |
Subdominant Eigenvalues for Stochastic Matrices with Given Column Sums
Kirkland, Steve (2009) Subdominant Eigenvalues for Stochastic Matrices with Given Column Sums. Electronic Journal of Linear Algebra, 18. pp. 784-800. ISSN 1081-3810
For any stochastic matrix A of order n, denote its eigenvalues as λ1(A), . . . ,λn(A... | {"url":"http://eprints.nuim.ie/1896/","timestamp":"2014-04-18T03:30:37Z","content_type":null,"content_length":"21974","record_id":"<urn:uuid:8012888c-8738-44d4-9638-4e6390bce8cb>","cc-path":"CC-MAIN-2014-15/segments/1397609532480.36/warc/CC-MAIN-20140416005212-00271-ip-10-147-4-33.ec2.internal.warc.gz"} |
The Hungarian Job Assignment
Date: 03/10/2011 at 04:17:34
From: Agan
Subject: assignment problem.
I have n people and n machines for them to operate. Each person operates a
single machine and commands a different wage for operating that machine.
How can I assign the machines among my employees so that I have to pay
the... | {"url":"http://mathforum.org/library/drmath/view/76599.html","timestamp":"2014-04-16T13:15:23Z","content_type":null,"content_length":"20946","record_id":"<urn:uuid:d11bf955-3f98-4b17-a19f-a1a8050feb0b>","cc-path":"CC-MAIN-2014-15/segments/1398223206770.7/warc/CC-MAIN-20140423032006-00033-ip-10-147-4-33.ec2.internal.war... |
Fairfield, CA Algebra Tutor
Find a Fairfield, CA Algebra Tutor
...History and English. I have been teaching special education for mild to moderate special education student for over 16 years. I have a current special education teaching credential and a
master's in special education.
21 Subjects: including algebra... | {"url":"http://www.purplemath.com/Fairfield_CA_Algebra_tutors.php","timestamp":"2014-04-18T18:55:44Z","content_type":null,"content_length":"24073","record_id":"<urn:uuid:3250ef5a-e6ae-4969-a6dd-1d534f7f7e2f>","cc-path":"CC-MAIN-2014-15/segments/1397609535095.7/warc/CC-MAIN-20140416005215-00150-ip-10-147-4-33.ec2.intern... |
Linear Regression Analysis
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Linear regression analysis is a powerful technique used for predicting the unknown value of a variable from the known value of another variable.
• 4Regression
• 8Other Ways to Analyse Data
More precisely, if X and Y are two related variables, then linear r... | {"url":"https://explorable.com/linear-regression-analysis","timestamp":"2014-04-19T18:01:30Z","content_type":null,"content_length":"46867","record_id":"<urn:uuid:a87f67be-cd3e-43a0-b586-b8aeddf79000>","cc-path":"CC-MAIN-2014-15/segments/1397609537308.32/warc/CC-MAIN-20140416005217-00344-ip-10-147-4-33.ec2.internal.warc... |
Can anyone help with this problem on Force??
October 3rd 2012, 11:48 AM #1
Junior Member
Jun 2012
Can anyone help with this problem on Force??
A circulur column has a diameter of 80mm outside edge and 60mm inside edge.
Both ends are fixed with equal force being applied top and bottom.
Young's Modulus E ... | {"url":"http://mathhelpforum.com/advanced-math-topics/204580-can-anyone-help-problem-force.html","timestamp":"2014-04-18T01:23:57Z","content_type":null,"content_length":"35752","record_id":"<urn:uuid:17c34ceb-ea0f-4df1-bc18-029b68dbce5b>","cc-path":"CC-MAIN-2014-15/segments/1397609538824.34/warc/CC-MAIN-20140416005218-... |
How do I calculate what size air conditioner (in BTUs) I
General Question
How do I calculate what size air conditioner (in BTUs) I need according to my apartment's square footage?
There's supposed to be some formula for this, but I can't locate it online anywhere.
Observing members: 0 Composing members: 0
5 Answers
... | {"url":"http://www.fluther.com/1840/how-do-i-calculate-what-size-air-conditioner-in-btus-i/","timestamp":"2014-04-16T17:17:24Z","content_type":null,"content_length":"33110","record_id":"<urn:uuid:571ad722-7112-4744-a0c8-c26ea9cce380>","cc-path":"CC-MAIN-2014-15/segments/1397609524259.30/warc/CC-MAIN-20140416005204-0059... |
e 4
Moment-Based Density Approximants
This appendix contains the Mathematica code that was used in connection with each of the seven examples. All the calculations are carried out with rational numbers so as to prevent any loss of
precision. It would be advisable to quit the kernel between examples.
Code for Example 1
... | {"url":"http://www.mathematica-journal.com/issue/v9i4/contents/DensityApproximants/DensityApproximants_6.html","timestamp":"2014-04-18T20:52:04Z","content_type":null,"content_length":"15331","record_id":"<urn:uuid:e61f0809-4b7c-4f6d-8948-c052c6edd01d>","cc-path":"CC-MAIN-2014-15/segments/1397609535095.9/warc/CC-MAIN-20... |
Russell Paradox
Date: Wed, 3 Jul 1996 00:15:34 +0100
From: Nicolas Weibel
Subject: Russell Paradox
Hi Dr. Math!
I'm looking for the demonstration of the Russell Paradox (there
is no ensemble of all ensembles).
Thanks a lot...
Date: Fri, 19 Jul 1996 16:11:20 -0400 (EDT)
Subject: Re: Russell Paradox
If you're talking abo... | {"url":"http://mathforum.org/library/drmath/view/51850.html","timestamp":"2014-04-16T11:25:36Z","content_type":null,"content_length":"6308","record_id":"<urn:uuid:a7ec3dfd-1e7e-414a-b85a-319e58be4fea>","cc-path":"CC-MAIN-2014-15/segments/1397609523265.25/warc/CC-MAIN-20140416005203-00072-ip-10-147-4-33.ec2.internal.war... |
Mathematics for Elementary School Teachers: Activity Manual 2nd Edition | 9780321449764 | eCampus.com
List Price: [S:$36.67:S]
Currently Available, Usually Ships in 24-48 Hours
Questions About This Book?
Why should I rent this book?
Renting is easy, fast, and cheap! Renting from eCampus.com can save you hundreds of dol... | {"url":"http://www.ecampus.com/mathematics-elementary-school-teachers/bk/9780321449764","timestamp":"2014-04-17T07:38:06Z","content_type":null,"content_length":"55959","record_id":"<urn:uuid:4b8466b8-3912-43e9-a771-be3d16451726>","cc-path":"CC-MAIN-2014-15/segments/1397609526311.33/warc/CC-MAIN-20140416005206-00529-ip-... |
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Here's the question you clicked on:
Please look at the question below:
• one year ago
• one ye... | {"url":"http://openstudy.com/updates/5137ad2ae4b01c4790d02264","timestamp":"2014-04-20T14:08:12Z","content_type":null,"content_length":"61521","record_id":"<urn:uuid:cc3b7c5e-ce02-4dfe-b0c7-757ec3ce5952>","cc-path":"CC-MAIN-2014-15/segments/1397609538787.31/warc/CC-MAIN-20140416005218-00632-ip-10-147-4-33.ec2.internal.... |
Re: 96-bit integer modulo, Athlon64 gcc 64-bit integers, libc codefor 64-bit division, etc.
"Jonathan Epstein" <Jonathan_Epstein@nih.gov>
16 May 2005 23:02:3... | {"url":"http://compilers.iecc.com/comparch/article/05-05-150","timestamp":"2014-04-19T12:09:45Z","content_type":null,"content_length":"8235","record_id":"<urn:uuid:ecaccc9a-219a-448b-8b1a-ecdd4ad51e49>","cc-path":"CC-MAIN-2014-15/segments/1397609537186.46/warc/CC-MAIN-20140416005217-00214-ip-10-147-4-33.ec2.internal.wa... |
long int type
05-20-2009 #1
Registered User
Join Date
May 2009
long int type
Hi every body!
I hope you guys are having a good day.
I was reading about long int type in c++. Here is what i find:
A signed long can hold all the values between LONG_MIN and LONG_MAX inclusive. LONG_MIN is required to be... | {"url":"http://cboard.cprogramming.com/cplusplus-programming/116074-long-int-type.html","timestamp":"2014-04-17T07:00:03Z","content_type":null,"content_length":"55884","record_id":"<urn:uuid:2fee2be6-8fb1-47f1-b0c9-0fc5073e408f>","cc-path":"CC-MAIN-2014-15/segments/1397609537804.4/warc/CC-MAIN-20140416005217-00110-ip-1... |
Strength of Materials
Flexure Formula
Stresses caused by the bending moment are known as flexural or bending stresses. Consider a beam to be loaded as shown.
Consider a fiber at a distance
By Hooke's law,
which means that the stress is proportional to the distance
... | {"url":"http://www.mathalino.com/reviewer/mechanics-and-strength-of-materials/flexure-formula","timestamp":"2014-04-16T10:11:16Z","content_type":null,"content_length":"64901","record_id":"<urn:uuid:9fb58660-03e7-4734-a34d-066d9ccf38eb>","cc-path":"CC-MAIN-2014-15/segments/1398223202457.0/warc/CC-MAIN-20140423032002-003... |
Theory Hoare_Examples
theory Hoare_Examples imports Hoare
(* Author: Tobias Nipkow *)
theory Hoare_Examples imports Hoare begin
text{* Improves proof automation for negative numerals: *}
lemma add_neg1R[simp]:
"x + -1 = x - (1 :: int)"
by arith
lemma add_neg_numeralR[simp]:
"x + neg_numeral n = (x::'a::neg_numeral)... | {"url":"http://www.cl.cam.ac.uk/research/hvg/Isabelle/dist/library/HOL/HOL-IMP/Hoare_Examples.html","timestamp":"2014-04-20T13:21:19Z","content_type":null,"content_length":"7843","record_id":"<urn:uuid:2e876385-4559-4897-86b7-9a2f7e06b93b>","cc-path":"CC-MAIN-2014-15/segments/1398223206118.10/warc/CC-MAIN-2014042303200... |
Prove surface area of cuboid.
December 27th 2009, 01:35 AM
Prove surface area of cuboid.
A cuboid has a volume of $8 m^3$. The base of the cuboid is square with sides of length x metres. the sureface area of the cuboid is $A m^2$.
Show that $A=2x^2+\frac{32}{x}$
December 27th 2009, 02:15 AM
Prove It
December 27... | {"url":"http://mathhelpforum.com/geometry/121672-prove-surface-area-cuboid-print.html","timestamp":"2014-04-24T10:05:29Z","content_type":null,"content_length":"11087","record_id":"<urn:uuid:47d2deff-987a-427f-bbcc-5f89fc0075b9>","cc-path":"CC-MAIN-2014-15/segments/1398223206118.10/warc/CC-MAIN-20140423032006-00596-ip-1... |
the first resource for mathematics
A Nash game approach to mixed
${H}_{2}/{H}_{\infty }$
(English) Zbl 0796.93027
Summary: The established theory of nonzero sum games is used to solve a mixed ${H}_{2}/{H}_{\infty }$ control problem. Our idea is to use the two play-off functions associated with a two-player Nash
game to... | {"url":"http://zbmath.org/?q=an:0796.93027","timestamp":"2014-04-20T01:10:33Z","content_type":null,"content_length":"21885","record_id":"<urn:uuid:0b10a6f6-b835-43d4-82ba-fd1a3816516e>","cc-path":"CC-MAIN-2014-15/segments/1398223203841.5/warc/CC-MAIN-20140423032003-00411-ip-10-147-4-33.ec2.internal.warc.gz"} |
Error Analysis
January 28th 2008, 06:44 PM #1
Oct 2006
Error Analysis
I'm really unsure where to post this so sorry if this is the wrong section, anyways:
The error part of my physics labs have been takin up a lot of time lately. Anyways, say I have 10 numbers for time measurements like 3.53 s, 5.32 s, 3.57... | {"url":"http://mathhelpforum.com/advanced-statistics/27023-error-analysis.html","timestamp":"2014-04-21T07:08:20Z","content_type":null,"content_length":"36810","record_id":"<urn:uuid:09f161ea-3462-4e9a-855a-3bfa13605e82>","cc-path":"CC-MAIN-2014-15/segments/1397609539665.16/warc/CC-MAIN-20140416005219-00009-ip-10-147-4... |
Shapeways: Bring your creativity to life in 3D3D FractalsRe: 3D Fractals
http://www.shapeways.com/forum/index.php Shapeways: Bring your creativity to life in 3D http://www.shapeways.com/forum/index.php?t=rview&goto=65683&th=13724#msg_65683 https://simonsfoundation.org/
multimedia/mathematical-impress ions-the-surprisin... | {"url":"http://www.shapeways.com/forum/rdf.php?mode=m&th=13724&basic=1","timestamp":"2014-04-18T23:31:01Z","content_type":null,"content_length":"5470","record_id":"<urn:uuid:7eb95d0c-91e7-48bd-b443-03272e1240fd>","cc-path":"CC-MAIN-2014-15/segments/1397609535535.6/warc/CC-MAIN-20140416005215-00143-ip-10-147-4-33.ec2.in... |
Hall Basis of a Free Lie Algebra
up vote -3 down vote favorite
Since a basis for a Free Lie Algebra $\cal{FL}$ with n generators $x_1,\ldots x_r$ can be described by the elements $\{ [\ldots[x_{i_1},x_{i_2}]x_{i_2}\ldots]x_{i_m}] , 1 \leq x_{i_j} \leq r , 1 \leq
j \leq m , m \in \mathbb{N} \}$ , what is the point of us... | {"url":"http://mathoverflow.net/questions/65968/hall-basis-of-a-free-lie-algebra","timestamp":"2014-04-18T23:23:15Z","content_type":null,"content_length":"51898","record_id":"<urn:uuid:c8c88257-ca37-4b04-a21c-005cddd90606>","cc-path":"CC-MAIN-2014-15/segments/1397609535535.6/warc/CC-MAIN-20140416005215-00435-ip-10-147-... |
Tech Report CS-96-13
Where to Draw the Line
Ashim Garg
April 1996
Graph Drawing (also known as Graph Visualization) tackles the problem of representing graphs on a visual medium such as computer screen, printer etc. Many applications such as software engineering,
data base design, project planning, VLSI design, multime... | {"url":"http://cs.brown.edu/research/pubs/techreports/reports/CS-96-13.html","timestamp":"2014-04-20T14:09:47Z","content_type":null,"content_length":"8000","record_id":"<urn:uuid:e1c1615c-8d30-4576-ad9c-8a20c3927fba>","cc-path":"CC-MAIN-2014-15/segments/1397609538787.31/warc/CC-MAIN-20140416005218-00635-ip-10-147-4-33.... |
Helix / Spring Volume
August 12th 2007, 08:44 AM #1
Aug 2007
Helix / Spring Volume
Hello, I need some help learning how to calculate the volume of a Spring. The only resource i can find is on wikipedia, but i am having trouble understanding it.
Please see : Spring (mathematics) - Wikipedia, the free encyclo... | {"url":"http://mathhelpforum.com/geometry/17708-helix-spring-volume.html","timestamp":"2014-04-19T13:47:21Z","content_type":null,"content_length":"36725","record_id":"<urn:uuid:8a4a2f36-0f14-4083-bb66-17bb706a2901>","cc-path":"CC-MAIN-2014-15/segments/1397609537186.46/warc/CC-MAIN-20140416005217-00114-ip-10-147-4-33.ec... |
Fredholm Integral Equation of the first kind
up vote 1 down vote favorite
I wish to solve the following integral equation, preferably analytically, and find $\int_{-l}^l f(x) dx$. If analytical solution is too complicated, any suggestion for the computational method?
$A_0+\int_{-l}^l \frac{f(x')}{x-x'} dx'+\int_{-l}^l ... | {"url":"http://mathoverflow.net/questions/123202/fredholm-integral-equation-of-the-first-kind","timestamp":"2014-04-19T02:26:08Z","content_type":null,"content_length":"44646","record_id":"<urn:uuid:6dcbf135-d01b-4be0-b68a-c88ff3a80735>","cc-path":"CC-MAIN-2014-15/segments/1397609535745.0/warc/CC-MAIN-20140416005215-000... |
Ordinary Differential Equations
An Approach to Solving Ordinary Differential Equations (Updated 1/15//10)
In many real life applications where we wish to evaluate a function, we are only able to define the relationship that the derivative of that function must satisfy. One example is the dynamics of a
vehicle in which... | {"url":"http://www.ohio.edu/people/urieli/odes/odes08.html","timestamp":"2014-04-20T05:47:06Z","content_type":null,"content_length":"18652","record_id":"<urn:uuid:2996d922-f5a7-4d7f-8764-d196d384a885>","cc-path":"CC-MAIN-2014-15/segments/1398223202774.3/warc/CC-MAIN-20140423032002-00051-ip-10-147-4-33.ec2.internal.warc... |
Weights and Measures
WEIGHTS AND MEASURES. The modern reader of the Scriptures lives in a world dominated by the scientific method and the reign of “fact”—measurable fact. Meat is weighed in pounds and ounces on scales
checked periodically by a bureau of weights and measures. Exact measurements in miles and fractions o... | {"url":"http://www.biblicaltraining.org/library/weights-and-measures","timestamp":"2014-04-25T01:31:21Z","content_type":null,"content_length":"94763","record_id":"<urn:uuid:d12066b1-84ed-4f28-82a8-59be034c621e>","cc-path":"CC-MAIN-2014-15/segments/1398223207046.13/warc/CC-MAIN-20140423032007-00594-ip-10-147-4-33.ec2.in... |
Fin Notes: Bond Valuation
BOND VALUATION
Basic Terminology
Callable Bonds
Convertible Bonds
Internal Rate of Return
Basic Terminology When a corporation such as IBM or General Motors wants to raise funds or capital it often wil... | {"url":"http://www.lehigh.edu/~sgb2/finNotesBondValuation.html","timestamp":"2014-04-21T02:04:03Z","content_type":null,"content_length":"14219","record_id":"<urn:uuid:17ece518-77fe-4088-b0f1-71c32a1c5386>","cc-path":"CC-MAIN-2014-15/segments/1397609539447.23/warc/CC-MAIN-20140416005219-00194-ip-10-147-4-33.ec2.internal... |
Pen & Paper Archives | MathBlog
In Problem 145 of Project Euler we move away from Geometry and over to number theory again, with a problem which readsSome positive integers n have the property that the sum [ n + reverse(n) ]
consists entirely of odd (decimal) digits. For instance, 36 + 63 = 99 and 409 + 904 = 1313. W... | {"url":"http://www.mathblog.dk/tag/pen-paper/","timestamp":"2014-04-16T10:11:29Z","content_type":null,"content_length":"40356","record_id":"<urn:uuid:d75e1566-830e-4e73-9333-44b8a7083b6c>","cc-path":"CC-MAIN-2014-15/segments/1398223207985.17/warc/CC-MAIN-20140423032007-00224-ip-10-147-4-33.ec2.internal.warc.gz"} |
The Collatz F
The Collatz Fractal
In the past, we have spent a significant amount of time discussing the Mandelbrot set and variations thereon. We saw that each Mandelbrot, multibrot, and Julia set can be characterized as a set of
complex numbers that behave “nicely” with respect to a function of the form \(f(z) = z^e ... | {"url":"http://yozh.org/2012/01/12/the_collatz_fractal/","timestamp":"2014-04-18T15:55:12Z","content_type":null,"content_length":"33880","record_id":"<urn:uuid:2817205b-b975-4510-b608-08badfc89f73>","cc-path":"CC-MAIN-2014-15/segments/1397609533957.14/warc/CC-MAIN-20140416005213-00548-ip-10-147-4-33.ec2.internal.warc.g... |
Catapult Formula
May 22nd 2008, 02:34 AM #1
Hey there!
I'm kinda stuck on a problem that I've tried to overcome. I built a catapult (and I'm very proud of myself) that only uses a counter weight on it's main arm, which is 20 inches long. I want to
make up a mathematical equation to go with my catapult, in r... | {"url":"http://mathhelpforum.com/pre-calculus/39248-catapult-formula.html","timestamp":"2014-04-19T07:48:10Z","content_type":null,"content_length":"35772","record_id":"<urn:uuid:6bd1fe0f-2aa1-40bb-93f0-d61c063162eb>","cc-path":"CC-MAIN-2014-15/segments/1398223211700.16/warc/CC-MAIN-20140423032011-00333-ip-10-147-4-33.e... |
The Time Value Of Money Refers To
The Time Value Of Money Refers To DOC
Sponsored High Speed Downloads
17) Time value of money refers to changes in consumer spending when inflation occurs. FALSE. 6. (p. 16) Most decisions have only a few alternatives from which to choose. ...
"Present value" refers to the: ... B. curr... | {"url":"http://ebookily.org/doc/the-time-value-of-money-refers-to","timestamp":"2014-04-23T22:30:04Z","content_type":null,"content_length":"45314","record_id":"<urn:uuid:8e5142f5-a6c2-4ebb-b518-0107ba2da56b>","cc-path":"CC-MAIN-2014-15/segments/1398223203841.5/warc/CC-MAIN-20140423032003-00059-ip-10-147-4-33.ec2.intern... |
What Is PID—Tutorial Overview
PID stands for Proportional, Integral, Derivative. Controllers are designed to eliminate the need for continuous operator attention. Cruise control in a car and a house thermostat are common examples
of how controllers are used to automatically adjust some variable to hold the measurement ... | {"url":"http://www.expertune.com/tutor.aspx","timestamp":"2014-04-19T06:53:03Z","content_type":null,"content_length":"21351","record_id":"<urn:uuid:d1699920-bdaa-48fc-976b-46b56025f228>","cc-path":"CC-MAIN-2014-15/segments/1397609536300.49/warc/CC-MAIN-20140416005216-00644-ip-10-147-4-33.ec2.internal.warc.gz"} |
A Novel Method for Training an Echo State Network with Feedback-Error Learning
Advances in Artificial Intelligence
Volume 2013 (2013), Article ID 891501, 9 pages
Research Article
A Novel Method for Training an Echo State Network with Feedback-Error Learning
Department of Computer and Information Science, Norwegian Univ... | {"url":"http://www.hindawi.com/journals/aai/2013/891501/","timestamp":"2014-04-16T16:55:28Z","content_type":null,"content_length":"137453","record_id":"<urn:uuid:ed1a5f10-6972-4f2b-aa5a-25ff9ad2a6cd>","cc-path":"CC-MAIN-2014-15/segments/1397609524259.30/warc/CC-MAIN-20140416005204-00651-ip-10-147-4-33.ec2.internal.warc... |
[Numpy-discussion] can int and float exists in one array?(about difference in indexing Matlab matrix and Numpy array)
Tim Hochberg tim.hochberg at ieee.org
Mon Nov 27 20:33:34 CST 2006
Zhang Sam wrote:
> Thanks for so many replies.
> In fact, I want to use several arrays to store the original data from
> a practical p... | {"url":"http://mail.scipy.org/pipermail/numpy-discussion/2006-November/024818.html","timestamp":"2014-04-18T23:55:12Z","content_type":null,"content_length":"5551","record_id":"<urn:uuid:99052e90-5427-4409-afc7-1acb19dc112b>","cc-path":"CC-MAIN-2014-15/segments/1397609535535.6/warc/CC-MAIN-20140416005215-00576-ip-10-147... |
Not to be confused with angels, angles are the pointed corners of shapes. Angles can be named three different ways.
This angle could be named any of these ways:
Look Out: when naming an angle using three letters, the vertex must always be the middle letter!
Types of Angles
Name Description ... | {"url":"http://www.shmoop.com/basic-geometry/angles-help.html","timestamp":"2014-04-19T12:27:48Z","content_type":null,"content_length":"43209","record_id":"<urn:uuid:ccbb3491-a3dd-45dc-bfbb-43cc6f91d2a8>","cc-path":"CC-MAIN-2014-15/segments/1398223206118.10/warc/CC-MAIN-20140423032006-00133-ip-10-147-4-33.ec2.internal.... |
Electromagnetic Simulation of the Near-Field Distribution around a Wind Farm
International Journal of Antennas and Propagation
Volume 2013 (2013), Article ID 105071, 9 pages
Research Article
Electromagnetic Simulation of the Near-Field Distribution around a Wind Farm
Department of Electrical and Computer Engineering, T... | {"url":"http://www.hindawi.com/journals/ijap/2013/105071/","timestamp":"2014-04-21T02:53:38Z","content_type":null,"content_length":"115810","record_id":"<urn:uuid:ae07f905-64bb-4db4-8139-ac237d8437a1>","cc-path":"CC-MAIN-2014-15/segments/1397609539447.23/warc/CC-MAIN-20140416005219-00232-ip-10-147-4-33.ec2.internal.war... |
Fox Island Algebra 1 Tutor
Find a Fox Island Algebra 1 Tutor
...I have a Masters Degree in Chemistry from the University of Washington, Seattle, and have been employed as a chemist and educator for over twenty years. I thoroughly enjoy teaching, and tutored
all through my college years. My goal as an instructor is ... | {"url":"http://www.purplemath.com/fox_island_wa_algebra_1_tutors.php","timestamp":"2014-04-16T19:04:42Z","content_type":null,"content_length":"23937","record_id":"<urn:uuid:c6991cbe-79d0-4e85-ac48-c09bf8e9c8b8>","cc-path":"CC-MAIN-2014-15/segments/1398223201753.19/warc/CC-MAIN-20140423032001-00063-ip-10-147-4-33.ec2.in... |
Dominik Reinhold
Assistant Professor
Department of Mathematics and Computer Science
Office: BP 343
Phone: 508-793-7346
Email: dreinhold@clarku.edu
My research interests are in probability and statistics and their applications in the life sciences. In particular, I have been working on branching processes and the modeli... | {"url":"http://math.clarku.edu/~dreinhold/","timestamp":"2014-04-21T10:37:52Z","content_type":null,"content_length":"67580","record_id":"<urn:uuid:ed0fbb65-2a8e-4b55-afc2-bb776d97b154>","cc-path":"CC-MAIN-2014-15/segments/1398223207985.17/warc/CC-MAIN-20140423032007-00572-ip-10-147-4-33.ec2.internal.warc.gz"} |
Re: An example LL(K) language that is not LL(K-1) ?
Chris F Clark <cfc@shell01.TheWorld.com>
Fri, 05 Feb 2010 18:12:01 -0500
From comp.compilers
| List of al... | {"url":"http://compilers.iecc.com/comparch/article/10-02-022","timestamp":"2014-04-19T12:11:02Z","content_type":null,"content_length":"8038","record_id":"<urn:uuid:44f41b9a-79c1-47ba-a6ea-1c1b23f9fb67>","cc-path":"CC-MAIN-2014-15/segments/1397609537186.46/warc/CC-MAIN-20140416005217-00021-ip-10-147-4-33.ec2.internal.wa... |
on a TI-85
Mean and Standard Deviation on a TI-85
Here's how to compute some basic statistics on your TI-85:
1. Press the [STAT] button. You should see something like this on your screen:
2. Press the [EDIT] button (that is, press the button on your calculator below the box labeled "EDIT" on the screen). Now your scr... | {"url":"http://www.willamette.edu/~mjaneba/help/TI-85-stats.htm","timestamp":"2014-04-20T01:08:57Z","content_type":null,"content_length":"6944","record_id":"<urn:uuid:14e66ada-aa21-4c03-bdb3-c27afae1c78e>","cc-path":"CC-MAIN-2014-15/segments/1398223203422.8/warc/CC-MAIN-20140423032003-00046-ip-10-147-4-33.ec2.internal.... |
Bob Prokop on what skeptics are looking for
This deserves its own post.
BP: Usually what skeptics are asking for is "signs and wonders". Some, like Loftus, have quite specifically demanded to see stars arrange themselves to spell out Bible verses, or some such nonsense
like that.
It's quite amusing, actually. They are ... | {"url":"http://dangerousidea.blogspot.com/2013/01/bob-prokop-on-what-skeptics-are-looking.html","timestamp":"2014-04-21T04:32:05Z","content_type":null,"content_length":"277317","record_id":"<urn:uuid:215ff50c-cc3e-4653-9294-c23c466a213b>","cc-path":"CC-MAIN-2014-15/segments/1397609539493.17/warc/CC-MAIN-20140416005219-... |
the first resource for mathematics
Differential operators canonically associated to a conformal structure.
(English) Zbl 0596.53009
In this article, the author describes differential operators acting on tensor bundles over a manifold which are naturally associated to a pseudo-Riemannian metric, and change covariantly w... | {"url":"http://zbmath.org/?q=an:0596.53009","timestamp":"2014-04-18T18:24:36Z","content_type":null,"content_length":"21179","record_id":"<urn:uuid:20e18dbf-1874-4d80-8594-9a9532c1e6df>","cc-path":"CC-MAIN-2014-15/segments/1397609535095.7/warc/CC-MAIN-20140416005215-00569-ip-10-147-4-33.ec2.internal.warc.gz"} |
complex function
Hi everybody, F(z)= $e^x$(cosy+isiny), i must show that F( $z_1+z_2$)=F( $z_1$).F( $z_2$) can you help me please???
You'll find it a lot easier if you recognize that $\cos{y}+i\sin{y}=e^{iy}$. Post again if you can't finish it from there. - Hollywood
The hard way to do it, if you don't have that formul... | {"url":"http://mathhelpforum.com/differential-geometry/139857-complex-function.html","timestamp":"2014-04-20T05:48:03Z","content_type":null,"content_length":"43114","record_id":"<urn:uuid:ee1a2739-0e52-477c-9c34-d21a7ae240df>","cc-path":"CC-MAIN-2014-15/segments/1397609539776.45/warc/CC-MAIN-20140416005219-00562-ip-10-... |
Interest Rate Swaps
Interest Rate Swaps and Swap Valuation
An interest rate swap is a contractual agreement between two counterparties to exchange cash flows on particular dates in the future. There are two types of legs (or series of cash flows). A fixed
rate payer makes a series of fixed payments and at the outset o... | {"url":"http://www.fincad.com/derivatives-resources/wiki/interest-rate-swap.aspx","timestamp":"2014-04-19T14:28:57Z","content_type":null,"content_length":"18495","record_id":"<urn:uuid:f752ed2a-c4d5-4735-95f2-dd13448193c3>","cc-path":"CC-MAIN-2014-15/segments/1397609537271.8/warc/CC-MAIN-20140416005217-00064-ip-10-147-... |
Kingsfield School - Building on Rich Starting Points
Copyright © University of Cambridge. All rights reserved.
Functions and Graphs is an example of what we call at Kingsfield a "common task" that all classes in a year group will work on at the same time, for anything between 2 and 6 weeks. These tasks are
designed so ... | {"url":"http://nrich.maths.org/6808/index?nomenu=1","timestamp":"2014-04-18T11:28:47Z","content_type":null,"content_length":"8042","record_id":"<urn:uuid:afbed3cd-ccae-41dc-b3e7-1346966e1e1d>","cc-path":"CC-MAIN-2014-15/segments/1398223211700.16/warc/CC-MAIN-20140423032011-00219-ip-10-147-4-33.ec2.internal.warc.gz"} |
Phone Number:
(609) 895-5432
Department Name:
Department of Mathematics
Mailing Address:
2083 Lawrence Road Lawrenceville, NJ 08648
Academic positions
• 1991-2013 Professor, Rider University
• 1983-1991 Associate Professor, Rider College
• 1980-1983 Assistant Professor, Rider College
• 2010-August 2011, Chairma... | {"url":"http://www.rider.edu/faculty/andrew-markoe","timestamp":"2014-04-16T10:49:32Z","content_type":null,"content_length":"50526","record_id":"<urn:uuid:77f37abb-c090-4115-8020-2366cfd2e5d9>","cc-path":"CC-MAIN-2014-15/segments/1397609523265.25/warc/CC-MAIN-20140416005203-00019-ip-10-147-4-33.ec2.internal.warc.gz"} |
Heinrich Niederhausen
www.math.fau.edu/niederhausen/Html/Information for Students.html
Heinrich Niederhausen
Professor of Mathematics at Florida Atlantic University
Florida Atlantic University Mathematical Sciences Homepage niederha@fau.edu
By the way, do you like Fibonacci number... | {"url":"http://math.fau.edu/niederhausen/HTML/InformationForStudents.html","timestamp":"2014-04-20T10:54:20Z","content_type":null,"content_length":"41154","record_id":"<urn:uuid:a50f2f7d-6631-4ed4-84fa-67bae2d81848>","cc-path":"CC-MAIN-2014-15/segments/1398223206118.10/warc/CC-MAIN-20140423032006-00134-ip-10-147-4-33.e... |
The complexity of analytic tableaux
Journal of Symbolic Logic
• Volume 71, Issue 3 (2006), 721-1080
The complexity of analytic tableaux
Noriko H. Arai,Toniann Pitassi, and Alasdair Urquhart
The method of analytic tableaux is employed in many introductory texts and has also been used quite extensively as a basis for a... | {"url":"http://projecteuclid.org/euclid.jsl/1154698576","timestamp":"2014-04-19T14:37:55Z","content_type":null,"content_length":"33953","record_id":"<urn:uuid:a92bd348-a446-467e-9b88-0b1705707f6b>","cc-path":"CC-MAIN-2014-15/segments/1398223206672.15/warc/CC-MAIN-20140423032006-00471-ip-10-147-4-33.ec2.internal.warc.gz... |
math help solve radical
April 25th 2007, 04:06 PM
math help solve radical
I have a problem that I can't seem to solve, and its driving me crazy.
Here it is:
x times the square root of 7 plus 4 = 2x
Thanks in advance for some hints on how to solve this
April 25th 2007, 04:29 PM | {"url":"http://mathhelpforum.com/algebra/14178-math-help-solve-radical-print.html","timestamp":"2014-04-16T05:35:00Z","content_type":null,"content_length":"4244","record_id":"<urn:uuid:65018f51-1df3-4009-a2db-6b97e5bdc4a2>","cc-path":"CC-MAIN-2014-15/segments/1397609521512.15/warc/CC-MAIN-20140416005201-00566-ip-10-147... |
Multiplying Monomials
Follow Algebra-Class
Recommend Algebra Class
Algebra Class E-course Members
Sign Up for Algebra Class E-courses
Click here to retrieve a... | {"url":"http://www.algebra-class.com/multiplying-monomials.html","timestamp":"2014-04-19T06:53:34Z","content_type":null,"content_length":"35459","record_id":"<urn:uuid:bab4609e-1909-4b38-810c-7e7f3e61d0f9>","cc-path":"CC-MAIN-2014-15/segments/1397609536300.49/warc/CC-MAIN-20140416005216-00104-ip-10-147-4-33.ec2.interna... |
the first resource for mathematics
Zero-inflated Poisson and binomial regression with random effects: a case study.
(English) Zbl 1060.62535
Summary: In a 1992 Technometrics paper,
D. Lambert
[Technometrics 34, 1–14 (1992;
Zbl 0850.62756
)] described zero-inflated Poisson (ZIP) regression, a class of models for count d... | {"url":"http://zbmath.org/?q=an:1060.62535","timestamp":"2014-04-19T19:42:51Z","content_type":null,"content_length":"21844","record_id":"<urn:uuid:fd7dbf92-f732-41fa-8cd6-9a68149c4afb>","cc-path":"CC-MAIN-2014-15/segments/1397609537376.43/warc/CC-MAIN-20140416005217-00312-ip-10-147-4-33.ec2.internal.warc.gz"} |
Stockbridge, GA Algebra Tutor
Find a Stockbridge, GA Algebra Tutor
...While enjoying all math, I specialize in Algebra, Trigonometry, Precalculus, Calculus, and Statistics. I look forward to being able to help you in your Math Classes. I was the math and science
lab supervisor at Georgia Perimeter College for five ... | {"url":"http://www.purplemath.com/Stockbridge_GA_Algebra_tutors.php","timestamp":"2014-04-18T21:19:43Z","content_type":null,"content_length":"24218","record_id":"<urn:uuid:9945aba7-67b6-46d4-b3a8-a0cde7f16a6f>","cc-path":"CC-MAIN-2014-15/segments/1398223206770.7/warc/CC-MAIN-20140423032006-00571-ip-10-147-4-33.ec2.inte... |
Computation, Automata, Languages
19 Sep 2013 09:58
Computers aren't made of matter.
--- Greg Egan, Permutation City
Ideal, theoretical computers are rather mathematical objects: they are, equivalently, algorithms, or effective procedures, or abstract automata, or functions which can be specified recursively, or... | {"url":"http://vserver1.cscs.lsa.umich.edu/~crshalizi/notebooks/computation.html","timestamp":"2014-04-20T10:23:28Z","content_type":null,"content_length":"16648","record_id":"<urn:uuid:675702df-75b6-4c41-a984-e071dfe98ebb>","cc-path":"CC-MAIN-2014-15/segments/1398223202548.14/warc/CC-MAIN-20140423032002-00431-ip-10-147... |
A Neat Problem
Here’s a neat game, with a really neat solution. I’ll post the solution later, but this post shows a Haskell implementation of the game. I first encountered this game as a puzzle in a game (an
otherwise unremarkable one) called Keepsake by The Adventure Company.
The game looks like this. There are five d... | {"url":"https://cdsmith.wordpress.com/2007/07/17/a-neat-problem/?like=1&_wpnonce=5e79d40c83","timestamp":"2014-04-19T02:20:20Z","content_type":null,"content_length":"75401","record_id":"<urn:uuid:a4fb0750-694f-4fb7-8cb9-88fa2c1b6d12>","cc-path":"CC-MAIN-2014-15/segments/1397609535745.0/warc/CC-MAIN-20140416005215-00143... |
Here's the stuff we found when you searched for "Set Theory:"
• Gödel-Bernays set theory
• NSA: some pseudo set theory
• NSA: some pseudo set theory footnote 1
• sketch of a Set Theory proof that every Goodstein's sequence reaches 0
• Semantics and Set Theory
• set theory notation
• Kelley-Morse set theor... | {"url":"http://everything2.com/title/Set+Theory%253A","timestamp":"2014-04-17T18:46:48Z","content_type":null,"content_length":"28789","record_id":"<urn:uuid:9953bd82-4026-4d66-865c-14a945a34e79>","cc-path":"CC-MAIN-2014-15/segments/1397609530895.48/warc/CC-MAIN-20140416005210-00315-ip-10-147-4-33.ec2.internal.warc.gz"} |
Math Forum Discussions - Cannot get inverse of y=x/logx to work
Date: May 30, 2011 1:16 AM
Author: Brad Cooper
Subject: Cannot get inverse of y=x/logx to work
I cannot get the correct result for the inverse calculation of
y = x/log(x).
On The fourth page (document pp. 240) of...
Partial Sums of Infinite Series, and How... | {"url":"http://mathforum.org/kb/plaintext.jspa?messageID=7473693","timestamp":"2014-04-18T08:24:47Z","content_type":null,"content_length":"2484","record_id":"<urn:uuid:702e5b25-0bdd-4bfc-aca9-0e65817f9aaa>","cc-path":"CC-MAIN-2014-15/segments/1397609533121.28/warc/CC-MAIN-20140416005213-00557-ip-10-147-4-33.ec2.interna... |
Tools - Circuit Sage
Circuit Sage Tools
Submit a tool
Passive Design
Spiral Inductor Calculator
This tool calculates inductance for different spiral inductors. The output is an estimate of the inductor value. For accurate results full EM simulation is recommended. The tool equation is
referenced from IEEE JSSC 19... | {"url":"http://www.circuitsage.com/tools/Passive_Design","timestamp":"2014-04-16T07:36:26Z","content_type":null,"content_length":"15795","record_id":"<urn:uuid:03afb35f-0fcf-46dd-8c80-f6dcda2a66e9>","cc-path":"CC-MAIN-2014-15/segments/1397609521558.37/warc/CC-MAIN-20140416005201-00497-ip-10-147-4-33.ec2.internal.warc.g... |
sensorweb.mit.edu: ARO MURI on Data Fusion in Large Arrays of Microsensors
MURI Research
Order research by Topic, Lead Researcher or by Date.
Topic: A Variational Approach to Array Processing in the Presence of Uncertainties
By: Dmitry M. Malioutov (MIT), Mujdat Cetin (MIT), Alan S. Willsky (MIT)
Topic: Active informat... | {"url":"http://sensorweb.mit.edu/research.php","timestamp":"2014-04-18T18:10:23Z","content_type":null,"content_length":"6192","record_id":"<urn:uuid:7dbc20b3-f4c4-4996-a9cd-a50f97e1f357>","cc-path":"CC-MAIN-2014-15/segments/1397609535095.7/warc/CC-MAIN-20140416005215-00353-ip-10-147-4-33.ec2.internal.warc.gz"} |
When the sun was directly overhead in syene, why was it not directly overhead in alex
1. When the sun was directly overhead in syene, why was it not directly overhead in Alexandria
The size of Earth was first measured in Egypt by Erathosthenes about 235 BC. He calculated the circumference of Earth in the following way.... | {"url":"http://www.physicsforums.com/showthread.php?t=634159","timestamp":"2014-04-16T16:18:05Z","content_type":null,"content_length":"53993","record_id":"<urn:uuid:27c6bcd8-b2f0-4823-9e15-b02e11836b42>","cc-path":"CC-MAIN-2014-15/segments/1397609524259.30/warc/CC-MAIN-20140416005204-00570-ip-10-147-4-33.ec2.internal.w... |
Wolfram Alpha - a new kind of Fail
Original URL: http://www.theregister.co.uk/2009/05/19/dziuba_wolfram/
Wolfram Alpha - a new kind of Fail
Welcome to the internet, Stephen
Posted in Applications, 19th May 2009 04:15 GMT
Comment Wolfram Alpha, the not-quite-search-engine from self appointed mathematical genius Stephen ... | {"url":"http://www.theregister.co.uk/Print/2009/05/19/dziuba_wolfram/","timestamp":"2014-04-16T22:47:05Z","content_type":null,"content_length":"17787","record_id":"<urn:uuid:69f74710-ad83-4288-a476-ab5ee0ffcc95>","cc-path":"CC-MAIN-2014-15/segments/1398223202548.14/warc/CC-MAIN-20140423032002-00023-ip-10-147-4-33.ec2.i... |
from The American Heritage® Dictionary of the English Language, 4th Edition
• n. The product of all the positive integers from 1 to a given number: 4 factorial, usually written 4!, is equal to 24 (1 × 2 × 3 × 4 = 24).
• adj. Of or relating to a factor or factorial.
from Wiktionary, Creative Commons Attribution/Shar... | {"url":"https://www.wordnik.com/words/factorial","timestamp":"2014-04-17T13:32:48Z","content_type":null,"content_length":"34401","record_id":"<urn:uuid:63fe0183-7512-44b7-99e9-92a2da67238c>","cc-path":"CC-MAIN-2014-15/segments/1397609530131.27/warc/CC-MAIN-20140416005210-00506-ip-10-147-4-33.ec2.internal.warc.gz"} |
Macungie Algebra 2 Tutor
Find a Macungie Algebra 2 Tutor
...All of a sudden when a letter is interjected within a problem. students become confused when they need not be. Tutoring will help with the transition from numbers to letters within problems so
it is not confusing to students. As a Mathematics Teacher (reti... | {"url":"http://www.purplemath.com/Macungie_Algebra_2_tutors.php","timestamp":"2014-04-20T10:58:06Z","content_type":null,"content_length":"24023","record_id":"<urn:uuid:373a0740-e20c-4a30-b010-e651afc59f04>","cc-path":"CC-MAIN-2014-15/segments/1397609538423.10/warc/CC-MAIN-20140416005218-00287-ip-10-147-4-33.ec2.interna... |
Signals and Systems
Author: , Date: 11 Jul 2010, Views: ,
Simon S. Haykin, Simon Haykin, Barry Van Veen, "Signals and Systems"
John Wiley Sons | 1998 | ISBN: 0000 | 694 pages | Djvu | 10,9 mb
Intended for use in an undergraduate course in electrical engineering, this book provides a modern treatment of signals and syst... | {"url":"http://www.ebook3000.com/Signals-and-Systems_77041.html","timestamp":"2014-04-16T21:58:17Z","content_type":null,"content_length":"13469","record_id":"<urn:uuid:a15770b9-aad7-4037-9018-f937c3c49a95>","cc-path":"CC-MAIN-2014-15/segments/1397609525991.2/warc/CC-MAIN-20140416005205-00224-ip-10-147-4-33.ec2.internal... |
Improving Compressed Air System Efficiency: Part 4
When sizing pipe for a compressed air system, keep in mind that without resistance to flow, there is no flow. Some pressure drop or some mass flow resistance is necessary. The amount of pressure drop
only needs to be hundredths of a psig for the system to work, but it ... | {"url":"http://hydraulicspneumatics.com/print/other-technologies/improving-compressed-air-system-efficiency-part-4","timestamp":"2014-04-21T13:09:32Z","content_type":null,"content_length":"26623","record_id":"<urn:uuid:84aecd68-a531-4a76-a552-357df3a1b792>","cc-path":"CC-MAIN-2014-15/segments/1397609539776.45/warc/CC-M... |
An interesting algorithm
January 8th 2014, 05:23 AM #1
Junior Member
Feb 2013
An interesting algorithm
For natural number N,we can take the smallest and largest prime divisors and get the sum of them and repeat the process as many times as we want.For example N=3 => sum of the smallest and largest
prime div... | {"url":"http://mathhelpforum.com/number-theory/225356-interesting-algorithm.html","timestamp":"2014-04-16T19:19:48Z","content_type":null,"content_length":"33017","record_id":"<urn:uuid:61e30398-4717-4874-84c1-de329a0ac240>","cc-path":"CC-MAIN-2014-15/segments/1397609524644.38/warc/CC-MAIN-20140416005204-00450-ip-10-147... |
Lone Tree, CO Algebra 2 Tutor
Find a Lone Tree, CO Algebra 2 Tutor
...On the "more fun" side, they are also at the heart of describing spatial motion in a number of different computer games and in many animated films, especially when combined with linear
algebra. A typical definition is "Statistics is the science o... | {"url":"http://www.purplemath.com/Lone_Tree_CO_Algebra_2_tutors.php","timestamp":"2014-04-17T21:56:01Z","content_type":null,"content_length":"24369","record_id":"<urn:uuid:4a14580d-d3d9-4cec-932f-241305af1f58>","cc-path":"CC-MAIN-2014-15/segments/1397609532128.44/warc/CC-MAIN-20140416005212-00274-ip-10-147-4-33.ec2.int... |
Constrained systems: Dirac and post-Dirac quantisation
Seminar Room 1, Newton Institute
I will first review Dirac's procedure of quantising (first class) constrained systems, discussing the mathematical structure that a quantisation should provide. I will then specialise to systems
whose gauge group is a Lie group and ... | {"url":"http://www.newton.ac.uk/programmes/GMR/seminars/2005110116001.html","timestamp":"2014-04-17T12:35:55Z","content_type":null,"content_length":"4364","record_id":"<urn:uuid:dc51a706-b1cb-4604-8868-c447d2a382c5>","cc-path":"CC-MAIN-2014-15/segments/1397609530131.27/warc/CC-MAIN-20140416005210-00563-ip-10-147-4-33.e... |
Browse by Author
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Gaffney, E
Martin, N K and Gaffney, E. A. and Gatenby, R A and Gillies, R. J. and Robey, I F and Maini, P. K. (2011) A mathematical model of tumour & blood pHe regulation: The HCO-3/CO2 buffering system.
Mathematical Biosciences, 230 (1). pp. 1-11.
Schofield, J W and Gaffney, E. A. ... | {"url":"http://eprints.maths.ox.ac.uk/view/author/Gatenby=3AR_A=3A=3A.html","timestamp":"2014-04-20T03:12:17Z","content_type":null,"content_length":"14588","record_id":"<urn:uuid:6d50c178-c87c-4557-beb8-95e37fd81d94>","cc-path":"CC-MAIN-2014-15/segments/1398223201753.19/warc/CC-MAIN-20140423032001-00219-ip-10-147-4-33.... |
Vector and Matrix Differentiation
Next: Appendix A: Pseudo-inverse Up: algebra Previous: Positive/Negative (Semi)-Definite Matrices
A vector differentiation operator is defined as
which can be applied to any scalar function
Vector differentiation has the following properties:
To prove the third one, consider the
Pu... | {"url":"http://fourier.eng.hmc.edu/e161/lectures/algebra/node7.html","timestamp":"2014-04-20T11:17:57Z","content_type":null,"content_length":"10286","record_id":"<urn:uuid:8326a1d2-dcd0-47e9-98e6-69562ddbb489>","cc-path":"CC-MAIN-2014-15/segments/1398223205137.4/warc/CC-MAIN-20140423032005-00133-ip-10-147-4-33.ec2.inte... |
I am basically trying to fit a data set of goals scored to a distribution (probably Poisson distribution although I am doubtful of the accuracy of this method) to attempt to predict the goals scored
by a football team from the data of previous results that I already have. I do not require programming help as I have pro... | {"url":"http://www.dreamincode.net/forums/topic/322963-does-anyone-have-any-experience-with-statistical-modelling/page__pid__1862371__st__0","timestamp":"2014-04-18T04:49:01Z","content_type":null,"content_length":"115523","record_id":"<urn:uuid:a97259a6-8537-4bde-a995-fcf95a7c0cc0>","cc-path":"CC-MAIN-2014-15/segments/... |
[FOM] Is current computability theory intuitionistic?
Craig Smorynski smorynski at sbcglobal.net
Fri Jun 28 17:54:09 EDT 2013
It seems to me that all concepts of mathematics are initially vague. People use them as if they know what they were talking about for ages until eventually precise definitions for them emerge. T... | {"url":"http://www.cs.nyu.edu/pipermail/fom/2013-June/017411.html","timestamp":"2014-04-19T19:37:05Z","content_type":null,"content_length":"10526","record_id":"<urn:uuid:beed39c4-2d38-49c5-aea4-a336196f52f1>","cc-path":"CC-MAIN-2014-15/segments/1398223202774.3/warc/CC-MAIN-20140423032002-00585-ip-10-147-4-33.ec2.intern... |
Question about this ratio in Metropolis-Hastings MCMC algorithm
up vote 3 down vote favorite
I have a stupid question about the Metropolis-Hastings sampling algorithm.
If I got this right, for every variable $X$ in turn, which currently has value $x_{old}$, you generate a new sample $x_{new}$. To do that, you draw $x_{... | {"url":"http://mathoverflow.net/questions/27090/question-about-this-ratio-in-metropolis-hastings-mcmc-algorithm","timestamp":"2014-04-21T15:33:31Z","content_type":null,"content_length":"61268","record_id":"<urn:uuid:ad8eca95-f11b-401f-948d-382869291d55>","cc-path":"CC-MAIN-2014-15/segments/1397609540626.47/warc/CC-MAIN... |
Contradiction to axiom of foundation
up vote 4 down vote favorite
Consider the usual language and axioms of ZF. Now add constants $x_1, x_2, \dots$ to the language together with the axioms $x_2\in x_1, x_3\in x_2, \dots$ to form a new theory. Then by the
compactness theorem, since every finite subset of the axioms has ... | {"url":"http://mathoverflow.net/questions/20531/contradiction-to-axiom-of-foundation","timestamp":"2014-04-21T04:54:26Z","content_type":null,"content_length":"59416","record_id":"<urn:uuid:ab8757e3-9468-4653-8384-0e2278f14c79>","cc-path":"CC-MAIN-2014-15/segments/1397609539493.17/warc/CC-MAIN-20140416005219-00647-ip-10... |
Geometry...hard conic problem
September 22nd 2010, 07:23 AM #1
Senior Member
Jan 2009
Geometry...hard conic problem
Identify the conic with equation x^2+3xy+4y^2-7=0, and find its center/vertex and axis.
My A matrix is (1 3/2; 3/2 4), which gives eigenvalues 1/2(5+3sqrt(2)) and 1/2(5-3sqrt(2))....these don'... | {"url":"http://mathhelpforum.com/advanced-algebra/157067-geometry-hard-conic-problem.html","timestamp":"2014-04-16T06:22:46Z","content_type":null,"content_length":"44251","record_id":"<urn:uuid:a8a93379-6aa3-459c-a266-0e3cceb4f2fc>","cc-path":"CC-MAIN-2014-15/segments/1397609537271.8/warc/CC-MAIN-20140416005217-00604-i... |
Chamblee, GA
Find a Chamblee, GA ACT Tutor
...I have taught complex mechanical and biomedical engineering principles to graduate and undergraduate students in formal classroom and laboratory settings. In addition I have tutored many high
school and college students in foundational math and physics skills. I can he... | {"url":"http://www.purplemath.com/Chamblee_GA_ACT_tutors.php","timestamp":"2014-04-17T19:28:55Z","content_type":null,"content_length":"23843","record_id":"<urn:uuid:0131991f-c2bc-4277-af25-63728d401e9c>","cc-path":"CC-MAIN-2014-15/segments/1398223205375.6/warc/CC-MAIN-20140423032005-00029-ip-10-147-4-33.ec2.internal.wa... |
Linear Equations in Two Variables
We are already familiar with solving linear equations of one variable. Let us discuss the situation as follows. 4 men and 4 boys can do a piece of work in 3 days while 2 men and 5 boys can finish it
in 4 days. How long would it take 1 boy to do it? How long would it take 1 man to do it... | {"url":"http://www.linearequations.org/linear-equations-in-two-variables.html","timestamp":"2014-04-16T18:55:59Z","content_type":null,"content_length":"84130","record_id":"<urn:uuid:652912f8-d64e-4d52-ab04-2a6468c0f1d9>","cc-path":"CC-MAIN-2014-15/segments/1397609524644.38/warc/CC-MAIN-20140416005204-00332-ip-10-147-4-... |
Class ExsltDynamic
Overview Package Class Use Tree Deprecated Index Help
PREV CLASS NEXT CLASS FRAMES NO FRAMES
SUMMARY: INNER | FIELD | CONSTR | METHOD DETAIL: FIELD | CONSTR | METHOD
Class ExsltDynamic
public class ExsltDynamic
extends ExsltBase
This class contains EXSLT dynamic extension funct... | {"url":"http://xml.apache.org/xalan-j/apidocs/org/apache/xalan/lib/ExsltDynamic.html","timestamp":"2014-04-19T22:10:23Z","content_type":null,"content_length":"29773","record_id":"<urn:uuid:de3ee0c5-94ad-45fe-9cf3-2236c9498e08>","cc-path":"CC-MAIN-2014-15/segments/1397609537754.12/warc/CC-MAIN-20140416005217-00026-ip-10... |
Solvability of a Third-Order Multipoint Boundary Value Problem at Resonance
Abstract and Applied Analysis
Volume 2014 (2014), Article ID 931217, 8 pages
Research Article
Solvability of a Third-Order Multipoint Boundary Value Problem at Resonance
^1School of Mathematics and Statistics Xuzhou, Jiangsu Normal University, ... | {"url":"http://www.hindawi.com/journals/aaa/2014/931217/","timestamp":"2014-04-21T02:35:13Z","content_type":null,"content_length":"765604","record_id":"<urn:uuid:3cba6667-9f1f-455b-bfaa-54666bca31a0>","cc-path":"CC-MAIN-2014-15/segments/1397609539447.23/warc/CC-MAIN-20140416005219-00297-ip-10-147-4-33.ec2.internal.warc... |
Math Forum Discussions
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Topic: Module 1's are out!
Replies: 22 Last Post: Jul 30, 2013 6:06 AM
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R... | {"url":"http://mathforum.org/kb/thread.jspa?threadID=2581489&messageID=9168243","timestamp":"2014-04-19T12:51:51Z","content_type":null,"content_length":"43383","record_id":"<urn:uuid:26b516a0-4893-4737-bd64-d1c200d8dc21>","cc-path":"CC-MAIN-2014-15/segments/1397609537186.46/warc/CC-MAIN-20140416005217-00439-ip-10-147-4... |
Area of triangle created from 3 planes
April 13th 2008, 11:50 PM #1
Apr 2008
Hey, first year student here and I'm dumb. Need loads of help please!
Ok, given 3 planes pi1, pi2 and pi3 with vector equations r.n1=0, r.n2=0 and (r-a).n3=0 respectively, where a, n1, n2, n3 are given vectors. No 2 planes are para... | {"url":"http://mathhelpforum.com/advanced-algebra/34411-area-triangle-created-3-planes.html","timestamp":"2014-04-17T01:31:27Z","content_type":null,"content_length":"32322","record_id":"<urn:uuid:b71872e2-463d-4964-b4b3-9699038d3ce4>","cc-path":"CC-MAIN-2014-15/segments/1397609526102.3/warc/CC-MAIN-20140416005206-00551... |
Chaitin's construction/Parser
From HaskellWiki
Let us describe the seen language with a LL(1) grammar, and let us make use of the lack of backtracking, lack of look-ahead, when deciding which parser approach to use.
Some notes about the used parser library: I shall use the didactical approach read in paper Monadic Pars... | {"url":"http://www.haskell.org/haskellwiki/Chaitin's_construction/Parser","timestamp":"2014-04-20T19:44:06Z","content_type":null,"content_length":"27071","record_id":"<urn:uuid:7c0de710-f478-4a44-8fa7-723a1af731cc>","cc-path":"CC-MAIN-2014-15/segments/1397609539066.13/warc/CC-MAIN-20140416005219-00342-ip-10-147-4-33.ec... |
Isomorphism Proof
August 14th 2010, 11:33 PM #1
Dec 2009
Isomorphism Proof
$(G, \circ)$ is a group. The operation $\star$ on $G$ is defined by $a \star b = b \circ a$ for all $a,b \in G$. Let $\phi$ be the map from G to itself such that $\phi(g)=g^{-1}$ where $g^{-1}$
is the inverse of $g$ in group $(G, \ci... | {"url":"http://mathhelpforum.com/advanced-algebra/153719-isomorphism-proof.html","timestamp":"2014-04-18T11:34:15Z","content_type":null,"content_length":"54649","record_id":"<urn:uuid:389f0a52-4110-4f5f-8045-daa42b160c5f>","cc-path":"CC-MAIN-2014-15/segments/1397609537308.32/warc/CC-MAIN-20140416005217-00570-ip-10-147-... |
Solved problems, unsolved problems, and nonproblems in concurrency
Results 1 - 10 of 23
- ACM TRANSACTIONS ON PROGRAMMING LANGUAGES AND SYSTEMS , 1993
"... ..."
- IEEE Transactions on Software Engineering , 1993
"... We give a formal definition of what it means for a system to "tolerate" a class of "faults". The defini... | {"url":"http://citeseerx.ist.psu.edu/showciting?cid=92185","timestamp":"2014-04-16T07:39:29Z","content_type":null,"content_length":"38260","record_id":"<urn:uuid:61ab3761-b1b8-4bdc-8aa4-6efd6624ed37>","cc-path":"CC-MAIN-2014-15/segments/1397609521512.15/warc/CC-MAIN-20140416005201-00182-ip-10-147-4-33.ec2.internal.warc... |
Prediction of Genetic Values of Quantitative Traits in Plant Breeding Using Pedigree and Molecular Markers
• We are sorry, but NCBI web applications do not support your browser and may not function properly.
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Genetics. Oct 2010; 186(2): 713–724.
Prediction of Genetic Values of Quantitative Traits ... | {"url":"http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2954475/?tool=pubmed","timestamp":"2014-04-20T06:12:03Z","content_type":null,"content_length":"150514","record_id":"<urn:uuid:b6ddb063-82e7-4008-8758-bc6f523c969e>","cc-path":"CC-MAIN-2014-15/segments/1397609538022.19/warc/CC-MAIN-20140416005218-00176-ip-10-147-4-33.e... |
From RepRapWiki
This page is a development stub. Please enhance this page by adding information, cad files, nice big images, and well structured data!
Release status: unknown
License GPL
Author JohnnyCooper, BeagleFury, galaxyman7
Based-on [[]]
Categories Polar DriveTrains
CAD Models none
Extern... | {"url":"http://reprap.org/wiki/Polar","timestamp":"2014-04-18T08:04:31Z","content_type":null,"content_length":"37081","record_id":"<urn:uuid:37345c3f-e093-4ff1-9766-3df0a7c42b4a>","cc-path":"CC-MAIN-2014-15/segments/1397609533121.28/warc/CC-MAIN-20140416005213-00011-ip-10-147-4-33.ec2.internal.warc.gz"} |
Physics and Astronomy
Friday, February 10, 2012
Computational Modeling in Introductory Physics
Ruth Chabay
North Carolina State University, Educational Research
Computational models are increasingly at the center of public discourse on topics ranging from investment strategies to climate change. How can we help our st... | {"url":"http://www.csupomona.edu/~physics/seminars/20120210chabay.htm","timestamp":"2014-04-21T07:05:13Z","content_type":null,"content_length":"6332","record_id":"<urn:uuid:65fe9dd4-24ef-4384-a499-44fcd168f665>","cc-path":"CC-MAIN-2014-15/segments/1398223203422.8/warc/CC-MAIN-20140423032003-00382-ip-10-147-4-33.ec2.int... |
Documentation: Changes: 2.0.29
AO (Application Orderings):
TS (Timestepping Solvers):
SNES (Nonlinear Solvers):
• The second argument to MatSNESMFSetType() is now a MatSNESMFType, rather than a char*. This should not affect any user code. Current built in choices are MATSNESMF_DEFAULT "default" and
MATSNESMF_WP "... | {"url":"http://www.mcs.anl.gov/petsc/documentation/changes/2029.html","timestamp":"2014-04-19T00:21:36Z","content_type":null,"content_length":"10949","record_id":"<urn:uuid:73cfabe8-0ef4-4f23-a1ac-f8797ec2b902>","cc-path":"CC-MAIN-2014-15/segments/1397609535535.6/warc/CC-MAIN-20140416005215-00146-ip-10-147-4-33.ec2.int... |
Roslindale Science Tutor
Find a Roslindale Science Tutor
...Real understanding - the kind that will not only lead to good grades or test scores, but also stay with you and serve you forever, even in other endeavors - consists not in the knowledge of a
laundry list of facts or a grab-bag of strategies but rather in ... | {"url":"http://www.purplemath.com/Roslindale_Science_tutors.php","timestamp":"2014-04-19T17:26:33Z","content_type":null,"content_length":"24037","record_id":"<urn:uuid:d09a224b-d269-44ed-8650-a2c6c171c212>","cc-path":"CC-MAIN-2014-15/segments/1398223202457.0/warc/CC-MAIN-20140423032002-00280-ip-10-147-4-33.ec2.internal... |
On the
- Adv. Appl. Prob , 1992
"... Abstract: This is the second part of our survey on exponential functionals of Brownian motion. We focus on the applications of the results about the distributions of the exponential functionals,
which have been discussed in the first part. Pricing formula for call options for the A... | {"url":"http://citeseerx.ist.psu.edu/showciting?cid=8343377","timestamp":"2014-04-16T05:58:40Z","content_type":null,"content_length":"29959","record_id":"<urn:uuid:83f63ae8-470f-4091-a84c-f86c56c11671>","cc-path":"CC-MAIN-2014-15/segments/1397609521512.15/warc/CC-MAIN-20140416005201-00010-ip-10-147-4-33.ec2.internal.wa... |