content stringlengths 86 994k | meta stringlengths 288 619 |
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Greek numerals are a bit more complicated than Roman. There are two distinct groups of Greek numerals, and both are given below.
First is the Acrophonic - this is type of Greek numerals that were used in ancient Greece up to Roman times (100 BC). It is called acrophonic because of the initial letter of the word designa... | {"url":"http://www.mathsisgoodforyou.com/numerals/greeknums.htm","timestamp":"2014-04-16T19:13:53Z","content_type":null,"content_length":"9226","record_id":"<urn:uuid:d65e4372-5874-4eb7-9a75-f83ff6af001a>","cc-path":"CC-MAIN-2014-15/segments/1397609524644.38/warc/CC-MAIN-20140416005204-00650-ip-10-147-4-33.ec2.internal... |
hash and __eq__
Aahz aahz at pythoncraft.com
Tue Jun 2 17:27:02 CEST 2009
In article <003e1491$0$9723$c3e8da3 at news.astraweb.com>,
Steven D'Aprano <steve at REMOVE-THIS-cybersource.com.au> wrote:
>On Sun, 31 May 2009 07:24:09 +0100, Arnaud Delobelle wrote:
>> AFAIK, 'complexity' means 'worst case complexity' unless ... | {"url":"https://mail.python.org/pipermail/python-list/2009-June/539089.html","timestamp":"2014-04-19T21:23:32Z","content_type":null,"content_length":"5031","record_id":"<urn:uuid:3bf83b07-d77e-495f-ae18-b8afc0621921>","cc-path":"CC-MAIN-2014-15/segments/1397609537376.43/warc/CC-MAIN-20140416005217-00330-ip-10-147-4-33.... |
Mplus Discussion >> LGM: Multiple indicator and regular models
LGM: Multiple indicator and regular m...
Tiina posted on Friday, January 06, 2006 - 3:30 am
I'm using Mplus version 3, and wondering the following questions concerning multiple and regular growth models (with three time scores). The questions are timel... | {"url":"http://www.statmodel.com/cgi-bin/discus/discus.cgi?pg=prev&topic=14&page=987","timestamp":"2014-04-16T16:02:36Z","content_type":null,"content_length":"24885","record_id":"<urn:uuid:14dc78cf-5cc3-4ce0-a2b7-8c28cbc4951d>","cc-path":"CC-MAIN-2014-15/segments/1398223203422.8/warc/CC-MAIN-20140423032003-00418-ip-10-... |
MATH 3703
Schedule-Spring 2014
Lecture Notes
... | {"url":"http://www.westga.edu/~srivera/3703/syallabus-2.htm","timestamp":"2014-04-16T22:26:24Z","content_type":null,"content_length":"119974","record_id":"<urn:uuid:02cb4aeb-be76-4142-ba41-e657c8f17a5e>","cc-path":"CC-MAIN-2014-15/segments/1398223203841.5/warc/CC-MAIN-20140423032003-00401-ip-10-147-4-33.ec2.internal.wa... |
Calculate your phone number - Aquila Online
Calculate your phone number
Here’s a quick party trick. [Via]
1. Grab a calculator. (unless you’re a MENSA member)
2. Key in the first three digits of your phone number. (NOT the area/operator code)
3. Multiply by 80
4. Add 1
5. Multiply by 250
6. Add the last 4 digits of you... | {"url":"http://www.aquilaonline.co.za/2006/07/calculate-your-phone-number/","timestamp":"2014-04-21T14:59:29Z","content_type":null,"content_length":"41407","record_id":"<urn:uuid:c74f49b9-cf50-4517-b9c2-d6b3c54705d0>","cc-path":"CC-MAIN-2014-15/segments/1398223205137.4/warc/CC-MAIN-20140423032005-00193-ip-10-147-4-33.e... |
Is the universal enveloping algebra of a finite-dimensional Lie algebra (left) noetherian?
up vote 1 down vote favorite
The universal enveloping algebra of a Lie algebra $\mathfrak{g}$ is a flat deformation of $S(\mathfrak{g})$, so these algebras should be similar in many ways. Does at least this general similarity
ra... | {"url":"http://mathoverflow.net/questions/118511/is-the-universal-enveloping-algebra-of-a-finite-dimensional-lie-algebra-left-n/118521","timestamp":"2014-04-21T04:40:19Z","content_type":null,"content_length":"59025","record_id":"<urn:uuid:9770324e-073e-4d57-bf8d-5319ca80601a>","cc-path":"CC-MAIN-2014-15/segments/139760... |
When we take a stroll in the park and notice the pretty flowers lining our sidewalks, we hardly take time to look into the mathematic beauty of it all. What kind of math you might ask? Specifically,
the Fibonacci numbers.
First things first, if one were mildly observant, he or she would count the petals on a flower.
Th... | {"url":"http://www.fabulousfibonacci.com/portal/index.php?option=com_content&view=article&id=10&Itemid=9","timestamp":"2014-04-19T22:06:06Z","content_type":null,"content_length":"21161","record_id":"<urn:uuid:8f092de2-9a13-40e7-b62e-faa47721cfad>","cc-path":"CC-MAIN-2014-15/segments/1397609537754.12/warc/CC-MAIN-201404... |
Splits a convex polygon by a plane
npm install split-polygon
Want to see pretty graphs? Log in now!
1 downloads in the last day
10 downloads in the last week
15 downloads in the last month
Splits a convex polygon by a plane into two parts (or optionally clips the polygon against a single plane) using the Sutherland-Ho... | {"url":"https://www.npmjs.org/package/split-polygon","timestamp":"2014-04-21T10:32:15Z","content_type":null,"content_length":"9468","record_id":"<urn:uuid:a810ad57-fcd3-4ec8-beee-bfca87aee96b>","cc-path":"CC-MAIN-2014-15/segments/1398223205137.4/warc/CC-MAIN-20140423032005-00154-ip-10-147-4-33.ec2.internal.warc.gz"} |
Baltimore, MD Algebra 1 Tutor
Find a Baltimore, MD Algebra 1 Tutor
...Honors graduate in Mathematical Physics with a Postgraduate Diploma Electrical Engineering, specializing in Software. I have overs 20 years corporate industrial experience in the field of
Software Engineering and Telecommunications (ICT). I have ... | {"url":"http://www.purplemath.com/baltimore_md_algebra_1_tutors.php","timestamp":"2014-04-16T04:51:29Z","content_type":null,"content_length":"23920","record_id":"<urn:uuid:e303d3ed-03ec-4751-ab77-558127f5438b>","cc-path":"CC-MAIN-2014-15/segments/1398223211700.16/warc/CC-MAIN-20140423032011-00108-ip-10-147-4-33.ec2.int... |
R: st: Zero-truncated Negative Binomial convergence
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R: st: Zero-truncated Negative Binomial convergence
From "Carlo Lazzaro" <carlo.lazzaro@tiscalinet.it>
To <statalist@hsphsun2.harvard.edu>
Subject R: st: Zero-truncated Negative Binomia... | {"url":"http://www.stata.com/statalist/archive/2009-03/msg00916.html","timestamp":"2014-04-18T18:30:29Z","content_type":null,"content_length":"9294","record_id":"<urn:uuid:110b7535-00bc-439a-a299-d85ccbf56fe3>","cc-path":"CC-MAIN-2014-15/segments/1397609535095.7/warc/CC-MAIN-20140416005215-00078-ip-10-147-4-33.ec2.inte... |
[Numpy-discussion] Array of Callables
Shane Holloway shane.holloway@ieee....
Wed Mar 21 11:01:03 CDT 2007
On Mar 21, 2007, at 6:58 AM, Anne Archibald wrote:
> Vectorizing apply is what you're looking for, by the sound of it:
> In [13]: a = array([lambda x: x**2, lambda x: x**3])
> In [14]: b = arange(5)
> In [15]: va =... | {"url":"http://mail.scipy.org/pipermail/numpy-discussion/2007-March/026611.html","timestamp":"2014-04-17T19:07:17Z","content_type":null,"content_length":"3992","record_id":"<urn:uuid:a3ab4963-e3bc-419b-9dd3-a7e3ec975c0d>","cc-path":"CC-MAIN-2014-15/segments/1398223201753.19/warc/CC-MAIN-20140423032001-00419-ip-10-147-4... |
Bridge circuits
No text on electrical metering could be called complete without a section on bridge circuits. These ingenious circuits make use of a null-balance meter to compare two voltages, just like the
laboratory balance scale compares two weights and indicates when they're equal. Unlike the "potentiometer" circui... | {"url":"http://www.allaboutcircuits.com/vol_1/chpt_8/10.html","timestamp":"2014-04-19T17:01:41Z","content_type":null,"content_length":"21943","record_id":"<urn:uuid:0af082b1-cf4f-4649-aa5d-abc61d5e8db6>","cc-path":"CC-MAIN-2014-15/segments/1398223202457.0/warc/CC-MAIN-20140423032002-00093-ip-10-147-4-33.ec2.internal.wa... |
Simulating the World Cup Knockout Stage
June 24, 2010 — Andrew Moylan, Technical Communication & Strategy
The knockout stage of the 2010 FIFA World Cup is about to begin in South Africa. At the time of writing, every team has one group stage match remaining, and most teams still have a chance to finish
in the top two p... | {"url":"http://blog.wolfram.com/2010/06/24/simulating-the-world-cup-knockout-stage/","timestamp":"2014-04-19T17:03:07Z","content_type":null,"content_length":"131880","record_id":"<urn:uuid:a2e80cf7-b6a9-4aca-8e6f-00f8b576dc4a>","cc-path":"CC-MAIN-2014-15/segments/1398223202548.14/warc/CC-MAIN-20140423032002-00053-ip-10... |
The diamond lemma
The diamond lemma November 20, 2009
Posted by David Speyer in Uncategorized.
A few results
1 (Bjorner, Eidelman and Ziegler) Suppose we have a finite collection of great circles on a sphere, none of them through the north or nouth pole. Let $R$ be the set of regions in the complement of
these circles,... | {"url":"http://sbseminar.wordpress.com/2009/11/20/the-diamond-lemma/","timestamp":"2014-04-18T18:10:43Z","content_type":null,"content_length":"106467","record_id":"<urn:uuid:7f4d1499-cc70-4383-b861-ce13ad004fa1>","cc-path":"CC-MAIN-2014-15/segments/1397609535095.7/warc/CC-MAIN-20140416005215-00054-ip-10-147-4-33.ec2.in... |
Generating Gaussian Random Numbers
let X~N(mu,sigma) then z=((x-mu)/sigma)~N(0,1) this is basic normal dist stuff now lets do it backwards ie let z~N(0,1) then X=(sigma*z + mu)~N(mu,sigma) so there ya go. with a N(0,1) generator to
make it N(mu, sigma) transform it by sigma*X + mu.
you can prove this without too much t... | {"url":"http://www.linuxquestions.org/questions/programming-9/generating-gaussian-random-numbers-215942/","timestamp":"2014-04-18T12:10:55Z","content_type":null,"content_length":"55946","record_id":"<urn:uuid:7b184b38-d3ee-4dda-a8e8-7984ccfb9168>","cc-path":"CC-MAIN-2014-15/segments/1397609533308.11/warc/CC-MAIN-201404... |
tion Photoshop plugin
Now you can easily draw the golden ratio/golden section, or other golden proportion, as an aid to composition. This plugin can draw the golden section, golden spiral and the golden triangles. In
addition it also can draw the harmonious triangles and the rule of thirds. Ships with a free golden sec... | {"url":"http://www.powerretouche.com/Divine_proportion_tutorial.htm","timestamp":"2014-04-21T09:37:14Z","content_type":null,"content_length":"39341","record_id":"<urn:uuid:e6a8f395-3156-4fe8-bc06-012a7f7412a5>","cc-path":"CC-MAIN-2014-15/segments/1397609539705.42/warc/CC-MAIN-20140416005219-00220-ip-10-147-4-33.ec2.int... |
Surely You Must Be Joking, Mr. Mahajan! The "Street-Fighting Mathematician" Answers Your Questions
We recently solicited your questions for Sanjoy Mahajan, author of Street-Fighting Mathematics. As usual, you came up with some excellent questions, about everything from the methodology of educated
guessing to Mahajan’s ... | {"url":"http://freakonomics.com/2010/07/16/surely-you-must-be-joking-mr-mahajan-the-street-fighting-mathematician-answers-your-questions/","timestamp":"2014-04-17T03:49:20Z","content_type":null,"content_length":"105507","record_id":"<urn:uuid:cc53f9e7-3c67-4c22-8278-15bd6dc7b35c>","cc-path":"CC-MAIN-2014-15/segments/13... |
R - avoiding loops with nested lists
up vote 4 down vote favorite
I know that for loops can be avoided almost all the time in R if you understand the language properly, but I'm struggling to find out the clever way of doing this
for (i in 1:100){
AllData[[i]]$Div = NULL
Where AllData is a list of 100 lists of various... | {"url":"http://stackoverflow.com/questions/12551450/r-avoiding-loops-with-nested-lists","timestamp":"2014-04-23T18:05:58Z","content_type":null,"content_length":"67164","record_id":"<urn:uuid:8c7ec69e-e3f2-47dd-864f-b309b1ae9d8d>","cc-path":"CC-MAIN-2014-15/segments/1398223203235.2/warc/CC-MAIN-20140423032003-00270-ip-1... |
HowStuffWorks "How Corrective Lenses Work"
• Compound lens: a lens having both a spherical and a cylindrical component
• Cylindrical curve: a curve that radiates along a straight line, like a pipe cut lengthwise
• Diopter (D): the refractive power of a lens; the higher the number, the stronger the lens
• Refrac... | {"url":"http://science.howstuffworks.com/innovation/everyday-innovations/lens4.htm","timestamp":"2014-04-16T04:15:58Z","content_type":null,"content_length":"121702","record_id":"<urn:uuid:c7ae71bb-50d6-4168-bccb-d6e94aef4d79>","cc-path":"CC-MAIN-2014-15/segments/1398223202548.14/warc/CC-MAIN-20140423032002-00165-ip-10-... |
Douglasville Algebra 2 Tutor
Find a Douglasville Algebra 2 Tutor
...My name is Scott, and I'm a full-time math instructor at Chattahoochee Technical College. I offer over 10 years of expert math teaching and tutoring experience. I'm highly skilled in all areas
of math including algebra, geometry, trigonometry, prec... | {"url":"http://www.purplemath.com/Douglasville_Algebra_2_tutors.php","timestamp":"2014-04-18T08:30:47Z","content_type":null,"content_length":"24162","record_id":"<urn:uuid:b5ad1360-a21c-403e-a2b5-82ba30654f63>","cc-path":"CC-MAIN-2014-15/segments/1398223202548.14/warc/CC-MAIN-20140423032002-00641-ip-10-147-4-33.ec2.int... |
Math Forum Discussions
Math Forum
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Topic: Ordinals describable by a finite string of symbols
Replies: 3 Last Post: Jul 11, 2013 8:42 PM
Me... | {"url":"http://mathforum.org/kb/thread.jspa?threadID=2581314&messageID=9167547","timestamp":"2014-04-19T00:24:02Z","content_type":null,"content_length":"19792","record_id":"<urn:uuid:b8c030d3-7d74-45e2-bbbf-f73d65704849>","cc-path":"CC-MAIN-2014-15/segments/1397609535535.6/warc/CC-MAIN-20140416005215-00056-ip-10-147-4-... |
An example of finite-time singularities in the 3d Euler equations
The Library
An example of finite-time singularities in the 3d Euler equations
He, Xinyu. (2007) An example of finite-time singularities in the 3d Euler equations. Journal of Mathematical Fluid Mechanics, Vol.9 (No.3). pp. 398-410. ISSN 1422-6928
Full tex... | {"url":"http://wrap.warwick.ac.uk/31610/","timestamp":"2014-04-17T06:57:40Z","content_type":null,"content_length":"35414","record_id":"<urn:uuid:9da8bf85-685d-49ea-b8eb-29b582bcca2b>","cc-path":"CC-MAIN-2014-15/segments/1397609526311.33/warc/CC-MAIN-20140416005206-00332-ip-10-147-4-33.ec2.internal.warc.gz"} |
Problems for Third Grade
3rd Grade Math Problems
If you’re looking for ways to help your 3rd grader get better at math, you’ve come to the right place! Check out our collection of fun, free and printable math problems for 3rd graders and get the
little ones to start practicing.
Help your young learner get better at r... | {"url":"http://www.mathblaster.com/teachers/math-problems/3rd-grade-math-problems","timestamp":"2014-04-19T19:33:26Z","content_type":null,"content_length":"88940","record_id":"<urn:uuid:5e2a7c09-88c1-4c07-9258-e1862f5e5a5b>","cc-path":"CC-MAIN-2014-15/segments/1398223206672.15/warc/CC-MAIN-20140423032006-00390-ip-10-14... |
The Language of Algebra - Definitions - Workout
Are these statements true or false? True False Feedback
"Pi" is a real number.
2.52 is a real, rational number.
n + 5 is an expression for “the sum of a number and five.”
3 is an irrational number.
“Twice a number divided by three” can be written... | {"url":"http://math.com/school/subject2/practice/S2U1L1/S2U1L1Pract.html","timestamp":"2014-04-20T20:54:51Z","content_type":null,"content_length":"37756","record_id":"<urn:uuid:76e64f68-220c-4fa7-81e0-e28d9601ad42>","cc-path":"CC-MAIN-2014-15/segments/1398223205375.6/warc/CC-MAIN-20140423032005-00661-ip-10-147-4-33.ec2... |
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can anyone send me best website link for math,physics n chemis... | {"url":"http://openstudy.com/updates/50fd8131e4b0860af51ed732","timestamp":"2014-04-16T04:25:32Z","content_type":null,"content_length":"52294","record_id":"<urn:uuid:97e31c4f-6c66-4320-9a1d-9715fd75e792>","cc-path":"CC-MAIN-2014-15/segments/1397609521512.15/warc/CC-MAIN-20140416005201-00452-ip-10-147-4-33.ec2.internal.... |
Wallington Precalculus Tutor
Find a Wallington Precalculus Tutor
...I have since been working professionally as a software developer. The first few years I worked in C and C++. The last few years have been primarily Java. I have a dual computer science and
computer engineering degree from NYU and Stevens Institute ... | {"url":"http://www.purplemath.com/Wallington_precalculus_tutors.php","timestamp":"2014-04-16T22:23:26Z","content_type":null,"content_length":"24107","record_id":"<urn:uuid:d81b7c02-82ec-47cf-8039-c53dd1646066>","cc-path":"CC-MAIN-2014-15/segments/1397609525991.2/warc/CC-MAIN-20140416005205-00461-ip-10-147-4-33.ec2.inte... |
Definition of Interpolate
Date: 10/27/95 at 5:56:19
From: Anonymous
Subject: Interpolate
Could you please define interpolate and give me an example?
I have looked in "The Book of Answers" and it defines interpolate:
Determination of an intermediary value of a function by means of a
sequence of known values of the funct... | {"url":"http://mathforum.org/library/drmath/view/58318.html","timestamp":"2014-04-19T11:58:49Z","content_type":null,"content_length":"6580","record_id":"<urn:uuid:d98b075f-af62-4022-945f-fdd778c1114c>","cc-path":"CC-MAIN-2014-15/segments/1398223202774.3/warc/CC-MAIN-20140423032002-00496-ip-10-147-4-33.ec2.internal.warc... |
show that p is not complete
November 25th 2011, 05:45 PM #1
Senior Member
Jan 2010
Prove that D is connected
Let $D \subset R$, and let f: D-->R be continuous. Prove that D is connected if { $x,f(x): x \in D$}, the graph of f, is a connected subset of $R^2$
Last edited by wopashui; November 25th 2011 at 06:... | {"url":"http://mathhelpforum.com/differential-geometry/192687-show-p-not-complete.html","timestamp":"2014-04-16T19:04:40Z","content_type":null,"content_length":"40340","record_id":"<urn:uuid:9da11223-4879-48b0-af31-b2dd1d119860>","cc-path":"CC-MAIN-2014-15/segments/1397609524644.38/warc/CC-MAIN-20140416005204-00267-ip-... |
Williams College Catalog
Electricity and Magnetism for Mathematicians (Q) Last offered Fall 2013
Maxwell's equations are four simple formulas, linking electricity and magnetism, that are among the most profound equations ever discovered. These equations led to the prediction of radio waves, to
the realization that a de... | {"url":"http://catalog.williams.edu/catalog.php?strm=1141&subj=MATH&cn=437","timestamp":"2014-04-21T07:46:13Z","content_type":null,"content_length":"28223","record_id":"<urn:uuid:b1f9b68c-ad89-4a7d-9f6b-6ff0eea26701>","cc-path":"CC-MAIN-2014-15/segments/1398223206147.1/warc/CC-MAIN-20140423032006-00646-ip-10-147-4-33.e... |
Speed of Sound
Speed of Sound
The speed of sound is different depending on the type of fluid that is being observed. It is based off of how fast a disturbance can travel through a fluid due to the relationship between pressure
and density. Refer to equation 1.
c = Speed of Sound
dP = Pressure Differential
dρ = Density ... | {"url":"http://engineering-references.sbainvent.com/fluid-mechanics/speed-of-sound.php","timestamp":"2014-04-20T03:11:44Z","content_type":null,"content_length":"15953","record_id":"<urn:uuid:b14e5e59-a236-44b8-ae52-9d91d62a2a52>","cc-path":"CC-MAIN-2014-15/segments/1398223206118.10/warc/CC-MAIN-20140423032006-00543-ip-... |
This is the question : I don't exactly know what my teacher means by hold ;
The response property is the most commonly used in formal software verification. Response(p; q) is true if every
time p holds, it is followed by q. Formally, Response(p; q) is true iff ∀ moments of time (states) i, if p(i) (meaning p
holds at m... | {"url":"http://www.lispforum.com/viewtopic.php?f=20&t=513&p=3425","timestamp":"2014-04-18T20:46:20Z","content_type":null,"content_length":"16153","record_id":"<urn:uuid:4fff8fb2-391e-499a-80fb-bdb5f4af6f01>","cc-path":"CC-MAIN-2014-15/segments/1397609535095.9/warc/CC-MAIN-20140416005215-00570-ip-10-147-4-33.ec2.interna... |
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Topic: Recursion Problem
Replies: 11 Last Post: Nov 22, 2011 9:44 PM
Messages: [ Previous | Next ]
Re:... | {"url":"http://mathforum.org/kb/thread.jspa?threadID=2316593&messageID=7610659","timestamp":"2014-04-19T00:20:18Z","content_type":null,"content_length":"30100","record_id":"<urn:uuid:866dc8cc-6e38-453b-bd48-9af67f1601d3>","cc-path":"CC-MAIN-2014-15/segments/1397609535535.6/warc/CC-MAIN-20140416005215-00540-ip-10-147-4-... |
Answer - Engineers
Answer :
This puzzle was artfully devised by the yellow man. It is not a matter for wonder that the representatives of the five countries interested were bewildered.
It would have puzzled the engineers a good deal to construct those circuitous routes so that the various trains might run with safety. ... | {"url":"http://www.pedagonet.com/puzzles/chinese1.htm","timestamp":"2014-04-20T19:03:09Z","content_type":null,"content_length":"12174","record_id":"<urn:uuid:4942d8af-2204-4504-804f-92bf4b27178a>","cc-path":"CC-MAIN-2014-15/segments/1397609539066.13/warc/CC-MAIN-20140416005219-00306-ip-10-147-4-33.ec2.internal.warc.gz"... |
The Arcsine Law: Why Traders Get Stuck Either in the Red or in the Green
This result explains why 50% of the people consistently lose money, while 50% consistently win. Let's compare stock trading to coin flipping (tails = loss, heads = gain). Then
• The probability that the number of heads exceeds the number of tail... | {"url":"http://www.analyticbridge.com/group/computationalfinance/forum/topics/the-arcsine-law-why-traders","timestamp":"2014-04-19T04:57:11Z","content_type":null,"content_length":"55908","record_id":"<urn:uuid:b8486790-c297-4a7e-8b80-9597dbe502c9>","cc-path":"CC-MAIN-2014-15/segments/1397609535775.35/warc/CC-MAIN-20140... |
Celia Hoyles Profile Page
Name: Professor Celia Hoyles
Dame Professor Celia Hoyles
Qualifications and position:
O.B.E PhD, BSc. (Hons), M.Ed, FIMA, AcSS
Professor of Mathematics Education
Faculty of ... | {"url":"http://www.lkl.ac.uk/cms/index.php?option=com_comprofiler&task=userProfile&user=91","timestamp":"2014-04-20T13:18:29Z","content_type":null,"content_length":"27573","record_id":"<urn:uuid:19577619-4b28-464d-97b9-cd8cc754314e>","cc-path":"CC-MAIN-2014-15/segments/1398223203235.2/warc/CC-MAIN-20140423032003-00029-... |
Discrete Mathematics & Theoretical Computer Science
Volume 3 n° 3 (1999), pp. 73-94
author: Peter Bürgisser
title: On the Structure of Valiant's Complexity Classes
keywords: Structural complexity, Algebraic theories of ... | {"url":"http://www.dmtcs.org/dmtcs-ojs/index.php/dmtcs/article/viewArticle/99/226","timestamp":"2014-04-19T02:31:09Z","content_type":null,"content_length":"15512","record_id":"<urn:uuid:161ea7f3-f4e0-41c0-8ec0-735d2541a919>","cc-path":"CC-MAIN-2014-15/segments/1397609535745.0/warc/CC-MAIN-20140416005215-00316-ip-10-147... |
Quantum Computation Roadmap
The overall purpose of this roadmap is to help facilitate the progress of quantum computation research towards the quantum computer science era. It is a living document that will be updated at least
Please e-mail comments on the quantum computation roadmap to Richard Hughes with a copy to Ma... | {"url":"http://qist.lanl.gov/qcomp_map.shtml","timestamp":"2014-04-21T09:35:53Z","content_type":null,"content_length":"7942","record_id":"<urn:uuid:bec45a24-daaa-42d2-b88c-478654fc8b5e>","cc-path":"CC-MAIN-2014-15/segments/1397609539705.42/warc/CC-MAIN-20140416005219-00173-ip-10-147-4-33.ec2.internal.warc.gz"} |
The Mathematics of a Pyramid Scheme - The Scam Explained
There are many "get rich quick" pyramid schemes on the internet. Some are illegal "pyramid schemes" (scams), and some are barely legal "business propositions" that bear a striking resemblance to an
illegal pyramid scheme.
The Simplest Pyramid Scheme - A Chain Let... | {"url":"http://www.mathmotivation.com/money/pyramid-scheme.html","timestamp":"2014-04-20T05:43:31Z","content_type":null,"content_length":"11396","record_id":"<urn:uuid:12cab008-2119-4436-aacc-4ff9f25609f8>","cc-path":"CC-MAIN-2014-15/segments/1397609538022.19/warc/CC-MAIN-20140416005218-00226-ip-10-147-4-33.ec2.interna... |
Data-partition and migration for efficient communication in distributed memory architectures are critical for performance of data parallel algorithms. This research presents a formal methodology for
the process of data-distribution and redistribution using tensor products and stride permutations as mathematical tools.... | {"url":"http://www.nagesh.com/publications/academic.html","timestamp":"2014-04-19T09:29:47Z","content_type":null,"content_length":"25348","record_id":"<urn:uuid:a17f8834-683f-4ed1-b392-6f892444d039>","cc-path":"CC-MAIN-2014-15/segments/1397609537097.26/warc/CC-MAIN-20140416005217-00288-ip-10-147-4-33.ec2.internal.warc.... |
<language> (Named after the "lollipop" operator "-o") An interpreter for logic programming based on linear logic, written by Josh Hodas <hodas@saul.cis.upenn.edu>.
Lolli can be viewed as a refinement of the Hereditary Harrop formulas of Lambda-Prolog. All the operators (though not the higher order unification) of Lambd... | {"url":"http://foldoc.org/Lolli","timestamp":"2014-04-20T10:53:58Z","content_type":null,"content_length":"5577","record_id":"<urn:uuid:c3fb0872-e760-46dd-96aa-28a2057de337>","cc-path":"CC-MAIN-2014-15/segments/1398223206120.9/warc/CC-MAIN-20140423032006-00027-ip-10-147-4-33.ec2.internal.warc.gz"} |
Adding Algebraic Fractions, Different Denominators
Date: 8/24/96 at 17:41:49
From: Anonymous
Subject: Adding Fractions with Different Denominators
My problem is:
7 2-x 3+5x
- + --- + ----
2x 3x^2 6x^3
How on earth do I solve this? Help!
Date: 8/26/96 at 12:30:58
From: Doctor Mike
Subject: Re: Adding Fractions ... | {"url":"http://mathforum.org/library/drmath/view/57374.html","timestamp":"2014-04-20T09:30:55Z","content_type":null,"content_length":"6489","record_id":"<urn:uuid:4e1b5bf4-c80b-448f-9e09-74479d5d1e6a>","cc-path":"CC-MAIN-2014-15/segments/1397609538110.1/warc/CC-MAIN-20140416005218-00033-ip-10-147-4-33.ec2.internal.warc... |
Ultrasound contrast microbubbles in imaging and therapy: physical principles and engineering
Microbubble contrast agents and the associated imaging systems have developed over the past twenty-five years, originating with manually-agitated fluids introduced for intra-coronary injection. Over
this period, stabilizing she... | {"url":"http://pubmedcentralcanada.ca/pmcc/articles/PMC2818980/?lang=en-ca","timestamp":"2014-04-17T13:45:27Z","content_type":null,"content_length":"300477","record_id":"<urn:uuid:d618381a-3400-4007-9af8-f7e09257be90>","cc-path":"CC-MAIN-2014-15/segments/1397609530131.27/warc/CC-MAIN-20140416005210-00023-ip-10-147-4-33... |
Algorithms/Distance approximations
Calculating distances is common in spatial and other search algorithms, as well as in computer game physics engines. However, the common Euclidean distance requires calculating square roots, which is
often a relatively heavy operation on a CPU.
You don't need a square root to compare ... | {"url":"http://en.m.wikibooks.org/wiki/Algorithms/Distance_approximations","timestamp":"2014-04-17T03:57:39Z","content_type":null,"content_length":"20435","record_id":"<urn:uuid:93389c22-33a2-427a-b177-bf5e62d12d7f>","cc-path":"CC-MAIN-2014-15/segments/1397609526252.40/warc/CC-MAIN-20140416005206-00390-ip-10-147-4-33.e... |
What is the square root of pi divided by 2?
Complex analysis, traditionally known as the theory of functions of a complex variable, is the branch of mathematical analysis that investigates functions of complex numbers. It is useful in many
branches of mathematics, including algebraic geometry, number theory, ap... | {"url":"http://answerparty.com/question/answer/what-is-the-square-root-of-pi-divided-by-2","timestamp":"2014-04-17T06:41:05Z","content_type":null,"content_length":"29789","record_id":"<urn:uuid:d49e9191-b719-4a73-bde0-e7224b6ea6b9>","cc-path":"CC-MAIN-2014-15/segments/1397609526311.33/warc/CC-MAIN-20140416005206-00018-... |
Errors of Two Kinds
I have had my results for a long time: but I do not know yet how I am to arrive at them.
~ Carl Friedrich Gauss (found here)
Psychologists are chronically – or rather intermittently – worried about how scientific their science is. The hallmark of a respectable science is that it yields reproducibl... | {"url":"http://www.psychologytoday.com/blog/one-among-many/201211/errors-two-kinds","timestamp":"2014-04-20T13:55:59Z","content_type":null,"content_length":"66047","record_id":"<urn:uuid:e89216e0-52c1-48a7-8f33-33048e1619a1>","cc-path":"CC-MAIN-2014-15/segments/1397609538787.31/warc/CC-MAIN-20140416005218-00557-ip-10-1... |
The Category Theory of Appendages
There has been much discussion recently on haskell-cafe about Monoids, much (too much!) focusing on the possibility of renaming of the existing monoid typeclass to "Appendable"... which is a daft
idea, not least because then we'd need to rename Monad to be "Appendage".
Anyway, I wanted... | {"url":"http://nattermorphisms.blogspot.com/2009/01/category-theory-of-appendages.html","timestamp":"2014-04-19T01:49:14Z","content_type":null,"content_length":"226574","record_id":"<urn:uuid:73f006fa-1c69-4163-a2be-4a65dc508f46>","cc-path":"CC-MAIN-2014-15/segments/1397609535745.0/warc/CC-MAIN-20140416005215-00469-ip-... |
A Guide to the R. G. Lubben Papers,
A Guide to the R. G. Lubben Papers, 1918-1974
Creator: Lubben, R. G. (Renke Gustav), 1898-1980
Title: R. G. Lubben Papers
Dates: 1918-1974
Abstract: R. G. Lubben (1898-1980) was R. L. Moore's second doctoral student at The University of Texas at Austin. After gradu... | {"url":"http://www.lib.utexas.edu/taro/utcah/00225/00225-P.html","timestamp":"2014-04-21T06:11:14Z","content_type":null,"content_length":"26637","record_id":"<urn:uuid:2a23e7cc-eed9-4b66-94cb-47411bf9845a>","cc-path":"CC-MAIN-2014-15/segments/1397609539493.17/warc/CC-MAIN-20140416005219-00546-ip-10-147-4-33.ec2.interna... |
Pooya Hatami
E-mail: pooya at cs . uchicago . edu
I am currently a PhD student in Department of Computer Science at University of Chicago under the supervision of Alexander Razborov and co-advised by Madhur Tulsiani.
Research Interests: Combinatorics, Additive Combinatorics, and Property Testing.
Theory Group at our de... | {"url":"http://people.cs.uchicago.edu/~pooya/","timestamp":"2014-04-17T09:34:08Z","content_type":null,"content_length":"8566","record_id":"<urn:uuid:e3e80276-d054-46be-8646-74d6268e8505>","cc-path":"CC-MAIN-2014-15/segments/1398223202774.3/warc/CC-MAIN-20140423032002-00643-ip-10-147-4-33.ec2.internal.warc.gz"} |
Proof that 1 + 1 = 1?
Date: 09/04/97 at 20:43:37
From: Ben Mayer
Subject: 1 + 1 = 1?
My programming teacher said that there was a proof that proved that
1 + 1 = 1. He also said in this proof that one of the steps was a
little bit "in the gray area." I was wondering if you could shed any
light on this subject.
Thank you... | {"url":"http://mathforum.org/library/drmath/view/57110.html","timestamp":"2014-04-16T04:31:03Z","content_type":null,"content_length":"7514","record_id":"<urn:uuid:d1115a2b-0d4e-4e4d-a9d7-6747c07c1990>","cc-path":"CC-MAIN-2014-15/segments/1397609535745.0/warc/CC-MAIN-20140416005215-00393-ip-10-147-4-33.ec2.internal.warc... |
Multiplying and Dividing Integers
PowerShow.com is a leading presentation/slideshow sharing website. Whether your application is business, how-to, education, medicine, school, church, sales, marketing, online training or just for
fun, PowerShow.com is a great resource. And, best of all, most of its cool features are fr... | {"url":"http://www.powershow.com/view/23e2f2-NjAwN/Multiplying_and_Dividing_Integers_powerpoint_ppt_presentation","timestamp":"2014-04-18T05:39:55Z","content_type":null,"content_length":"93514","record_id":"<urn:uuid:8eada623-8844-4a96-96d5-6d9f3472729e>","cc-path":"CC-MAIN-2014-15/segments/1397609532573.41/warc/CC-MAI... |
This Article
Bibliographic References
Add to:
Efficient Simplification of Large Vector Maps Rendered onto 3D Landscapes
March/April 2011 (vol. 31 no. 2)
pp. 14-23
ASCII Text ... | {"url":"http://www.computer.org/csdl/mags/cg/2011/02/mcg2011020014-abs.html","timestamp":"2014-04-18T08:07:54Z","content_type":null,"content_length":"55406","record_id":"<urn:uuid:07f35eaa-a075-4d8b-aff4-968b542a00be>","cc-path":"CC-MAIN-2014-15/segments/1397609533121.28/warc/CC-MAIN-20140416005213-00409-ip-10-147-4-33... |
Homework Help
Posted by black mamba on Wednesday, March 23, 2011 at 11:47am.
what is the area of circle with the diameter of 15 feet, rounded to the nearest whole number?
• math - Writeacher, Wednesday, March 23, 2011 at 11:59am
http://www.aaamath.com/ >>> http://www.aaastudy.com/geo.htm >>> Surface area
• math... | {"url":"http://www.jiskha.com/display.cgi?id=1300895275","timestamp":"2014-04-18T11:11:54Z","content_type":null,"content_length":"9694","record_id":"<urn:uuid:d70d018d-b738-4604-b3dd-d7e18983b3e4>","cc-path":"CC-MAIN-2014-15/segments/1397609533308.11/warc/CC-MAIN-20140416005213-00190-ip-10-147-4-33.ec2.internal.warc.gz... |
scipy.stats.describe(a, axis=0)[source]¶
Computes several descriptive statistics of the passed array.
a : array_like
Parameters :
axis : int or None
axis along which statistics are calculated. If axis is None, then data array is raveled. The default axis is... | {"url":"http://docs.scipy.org/doc/scipy/reference/generated/scipy.stats.describe.html","timestamp":"2014-04-18T03:01:00Z","content_type":null,"content_length":"8385","record_id":"<urn:uuid:15410cb5-7694-433f-ae91-993d1bddfaca>","cc-path":"CC-MAIN-2014-15/segments/1397609532480.36/warc/CC-MAIN-20140416005212-00090-ip-10... |
Baghdad Bazaar: A Statistics Primer
Magic is a game of chance.
Well, more specifically, Magic is a game of strict probabilities, enriched by randomization and tempered by judicious playskill. And although you'll never know for certain what the top card of your
library is when you shuffle, you can certainly limit the nu... | {"url":"http://www.mtgsalvation.com/articles/15551-baghdad-bazaar-a-statistics-primer?cookieTest=1","timestamp":"2014-04-25T08:36:46Z","content_type":null,"content_length":"75364","record_id":"<urn:uuid:f73fe489-cf7e-4477-873e-785c8929f287>","cc-path":"CC-MAIN-2014-15/segments/1398223211700.16/warc/CC-MAIN-201404230320... |
[Kinematics] Don't know how to find value
May 24th 2010, 04:38 AM #1
[Kinematics] Don't know how to find value
Crate is being lowered by a crane at a constant speed of 2 m/s when a ball falls out of the hole in the crate, it hits the floor 10s before the crate. Find the height of the crate when the ball
fell ou... | {"url":"http://mathhelpforum.com/math-topics/146206-kinematics-don-t-know-how-find-value.html","timestamp":"2014-04-18T06:46:04Z","content_type":null,"content_length":"49282","record_id":"<urn:uuid:4fe1c360-d337-457d-9ae1-b24ee4aebbcc>","cc-path":"CC-MAIN-2014-15/segments/1397609532573.41/warc/CC-MAIN-20140416005212-00... |
Re: st: use -nlsur- to deal with nonlinear IV estimation?
[Date Prev][Date Next][Thread Prev][Thread Next][Date index][Thread index]
Re: st: use -nlsur- to deal with nonlinear IV estimation?
From "Austin Nichols" <austinnichols@gmail.com>
To statalist@hsphsun2.harvard.edu
Subject Re: st: use -nlsur- to deal wit... | {"url":"http://www.stata.com/statalist/archive/2008-07/msg00454.html","timestamp":"2014-04-19T12:01:01Z","content_type":null,"content_length":"8428","record_id":"<urn:uuid:21995fec-ff5c-4362-8ac7-14c17a383908>","cc-path":"CC-MAIN-2014-15/segments/1397609537186.46/warc/CC-MAIN-20140416005217-00614-ip-10-147-4-33.ec2.int... |
Probability Problem
February 7th 2013, 05:55 PM
Probability Problem
Attachment 26895
This problem was in the textbook. To find the probability of mu we have P(-0.96<Z<1.09)=0.69. So I reasoned the probability of at least for was (0.69)^4(0.31)+(0.69)^5. But the solution has 5*
(0.69)^4(0.31)+(0.69)^5. Maybe... | {"url":"http://mathhelpforum.com/advanced-statistics/212746-probability-problem-print.html","timestamp":"2014-04-20T02:09:36Z","content_type":null,"content_length":"4228","record_id":"<urn:uuid:7c44d69e-df4c-4753-981f-1d11deba6a68>","cc-path":"CC-MAIN-2014-15/segments/1397609537804.4/warc/CC-MAIN-20140416005217-00043-i... |
Understanding Natural Frequency: Masses on Rods
A common technique for analyzing structures is to treat them as lumped masses on a single rod, which simplifies the analysis. A single story building would then be modeled as a rod of the height of
the structure with all of the weight of the structure located at the top o... | {"url":"http://nees.org/resources/3609","timestamp":"2014-04-21T10:30:42Z","content_type":null,"content_length":"46160","record_id":"<urn:uuid:b8106be6-3cfc-40ab-ada5-7cb68142394e>","cc-path":"CC-MAIN-2014-15/segments/1398223202548.14/warc/CC-MAIN-20140423032002-00025-ip-10-147-4-33.ec2.internal.warc.gz"} |
First Idea; Best Idea...
...and the Worst Idea
Creating a Culture of Questions
was, by far, the most popular post on this blog until someone somewhere starting linking to the post on Exponent Rules.
I think a natural follow up to the Culture piece would be with regards to establishing a classroom culture where feedback... | {"url":"http://coxmath.blogspot.com/2013/11/first-idea-best-idea.html","timestamp":"2014-04-18T18:10:59Z","content_type":null,"content_length":"84663","record_id":"<urn:uuid:453a31e1-0633-4cc7-b166-ef81d3ae3270>","cc-path":"CC-MAIN-2014-15/segments/1397609535095.7/warc/CC-MAIN-20140416005215-00621-ip-10-147-4-33.ec2.in... |
What Are The Odds When Rolling 3d6?
posted Tuesday, May 25th 2010 by
None of the Above
You kids today have it easy. Back in the early days of D&D you rolled 3d6 for ability scores, placed in the order you rolled them. No “4d6 drop lowest” or “arrange as desired” – if you roll a 3 for
Strength, your character has 3 Stre... | {"url":"http://www.d20source.com/2010/05/what-are-the-odds-when-rolling-3d6","timestamp":"2014-04-19T11:56:51Z","content_type":null,"content_length":"24343","record_id":"<urn:uuid:95dc3c9e-0ce4-4b16-9b9b-efffde575066>","cc-path":"CC-MAIN-2014-15/segments/1398223201753.19/warc/CC-MAIN-20140423032001-00444-ip-10-147-4-33... |
Does the Aharonov–Bohm Effect Exist?
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pp 893-905
Does the Aharonov–Bohm Effect Exist?
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We draw... | {"url":"http://link.springer.com/article/10.1023/A:1003602524894","timestamp":"2014-04-21T04:59:42Z","content_type":null,"content_length":"47581","record_id":"<urn:uuid:5c1a3cda-7f43-492b-8994-f52815c05500>","cc-path":"CC-MAIN-2014-15/segments/1397609539493.17/warc/CC-MAIN-20140416005219-00185-ip-10-147-4-33.ec2.intern... |
is Hasse principle a birational invariant?
Take the 2-minute tour ×
MathOverflow is a question and answer site for professional mathematicians. It's 100% free, no registration required.
...it is probably a very trivial question, but I am a beginner in arithmetics.
I'm not sure how well-posed this questions is. A p... | {"url":"https://mathoverflow.net/questions/108270/is-hasse-principle-a-birational-invariant","timestamp":"2014-04-21T05:04:09Z","content_type":null,"content_length":"59151","record_id":"<urn:uuid:2d715e32-474a-4f32-8996-bf42f22bf326>","cc-path":"CC-MAIN-2014-15/segments/1397609539493.17/warc/CC-MAIN-20140416005219-0045... |
Need your input about difficult program?
02-12-2002 #1
Registered User
Join Date
Jan 2002
Need your input about difficult program?
I do not understand how to get started with my program. I need to write a program that calculates the sin of x with a truncation error of less than 0.000001. The truncation error is... | {"url":"http://cboard.cprogramming.com/c-programming/10837-need-your-input-about-difficult-program.html","timestamp":"2014-04-16T13:44:32Z","content_type":null,"content_length":"50319","record_id":"<urn:uuid:df6141b6-93ee-4eaf-81f8-6f324c8e86e0>","cc-path":"CC-MAIN-2014-15/segments/1397609523429.20/warc/CC-MAIN-2014041... |
Le Monde puzzle [#14.2]
I received at last my weekend edition of Le Monde and hence the solution proposed by the authors (Cohen and Busser) to the puzzle #14. They obtain a strategy that only requires at most 19 steps. The
idea is to start with a first test, which gives a reference score S[0], and then work on groups o... | {"url":"http://xianblog.wordpress.com/2011/05/15/le-monde-puzzle-14-2/","timestamp":"2014-04-20T08:14:56Z","content_type":null,"content_length":"38588","record_id":"<urn:uuid:0700a583-c95f-4ec0-8bf2-47495bf0432a>","cc-path":"CC-MAIN-2014-15/segments/1398223206770.7/warc/CC-MAIN-20140423032006-00378-ip-10-147-4-33.ec2.i... |
Probability of defective circuit card in the sample
1. 144390
Probability of defective circuit card in the sample
Printed circuit cards are placed in a functional test after being populated with semiconductor chips. A lot contains 140 cards, and 20 are selected without replacement for functional testing.
a.) If 20 ca... | {"url":"https://brainmass.com/statistics/probability/144390","timestamp":"2014-04-19T17:02:51Z","content_type":null,"content_length":"25425","record_id":"<urn:uuid:6ae5838a-4137-4bb0-9799-912df5a826e2>","cc-path":"CC-MAIN-2014-15/segments/1398223206118.10/warc/CC-MAIN-20140423032006-00253-ip-10-147-4-33.ec2.internal.wa... |
Workshops & Conferences
Spin Glasses: What's the Big Idea? (Is There One?)
Host Department: Physics
Date: 04/02/2014
Time: 4:00 PM - 5:00 PM
Location: 340 West Hall
The aim of this talk is to introduce the subject of spin glasses, and more generally the statistical mechanics of quenched disorder, as a problem of genera... | {"url":"http://www.lsa.umich.edu/vgn-ext-templating/v/index.jsp?vgnextoid=3f06c37f7a3c2410VgnVCM100000c2b1d38dRCRD&vgnextchannel=9a34f78dcbd8f210VgnVCM100000c2b1d38dRCRD&vgnextfmt=detail","timestamp":"2014-04-18T03:33:03Z","content_type":null,"content_length":"17282","record_id":"<urn:uuid:e49a59b2-8b58-4678-a570-16ff5... |
Help with UnivariateTwinAnalysis_MatrixRawConACE.R
Wed, 10/17/2012 - 16:06
The documentation on mxCI is
The documentation on mxCI is not too bad:
mxCI(reference, interval = 0.95, type=c("both", "lower", "upper"))
A character vector of free parameters, mxMatrices, mxMatrix elements and mxAlgebras on which confidence int... | {"url":"http://openmx.psyc.virginia.edu/thread/1652","timestamp":"2014-04-18T18:49:00Z","content_type":null,"content_length":"28074","record_id":"<urn:uuid:4b883a71-a12a-4957-b55b-1ed099803510>","cc-path":"CC-MAIN-2014-15/segments/1398223206120.9/warc/CC-MAIN-20140423032006-00470-ip-10-147-4-33.ec2.internal.warc.gz"} |
Math Forum Discussions
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Topic: Can you solve this question?
Replies: 2 Last Post: Oct 21, 2011 8:30 AM
Messages: [ Previous | N... | {"url":"http://mathforum.org/kb/thread.jspa?threadID=2307045","timestamp":"2014-04-19T00:35:04Z","content_type":null,"content_length":"19195","record_id":"<urn:uuid:5004ac19-a461-4967-80e6-46a47a1c0450>","cc-path":"CC-MAIN-2014-15/segments/1397609535535.6/warc/CC-MAIN-20140416005215-00081-ip-10-147-4-33.ec2.internal.wa... |
He now has a WAR of 9.1.
Click here to see the leaders
. Trout is tied for 94th. Actually 94th-103rd. He also is 2nd only to Babe Ruth's 1923 season in WAR per game (.0858).
Click here to see that list.
If Trout could get just .0429 WAR per game over the last 33 games, he would add 1.4 WAR. He would finish with 10.5. T... | {"url":"http://cybermetric.blogspot.com/2012_08_01_archive.html","timestamp":"2014-04-19T14:43:56Z","content_type":null,"content_length":"104977","record_id":"<urn:uuid:7a1c5b42-a766-4cc3-86c9-a2e3776722ac>","cc-path":"CC-MAIN-2014-15/segments/1397609537271.8/warc/CC-MAIN-20140416005217-00548-ip-10-147-4-33.ec2.interna... |
Math Forum Discussions
Math Forum
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Views expressed in these public forums are not endorsed by Drexel University or The Math Forum.
Topic: FW: August administration of Algebra 2 trig Regents exam
Replies: 2 Last Post: Apr 27, 2011 5:12 PM
... | {"url":"http://mathforum.org/kb/message.jspa?messageID=7441009","timestamp":"2014-04-20T04:22:27Z","content_type":null,"content_length":"19119","record_id":"<urn:uuid:cadb525f-d744-4191-8342-6dff64c19896>","cc-path":"CC-MAIN-2014-15/segments/1398223201753.19/warc/CC-MAIN-20140423032001-00365-ip-10-147-4-33.ec2.internal... |
Reality Conditions
Math Jokes
Via the a link in
a Quantum Pontiff thread
, I found an excellent
collection of mathematical humour
, which (amazingly) includes many jokes I had never seen or heard before, and many of them good ones! (For highly nerdy values of "good".) For example, the
hyperbolas joke
made me laugh out ... | {"url":"http://realityconditions.blogspot.com/2007/11/math-jokes.html","timestamp":"2014-04-16T04:36:55Z","content_type":null,"content_length":"36777","record_id":"<urn:uuid:eba0f8c8-4cc5-4cb2-99ab-0be3ae466c7e>","cc-path":"CC-MAIN-2014-15/segments/1398223206672.15/warc/CC-MAIN-20140423032006-00492-ip-10-147-4-33.ec2.i... |
atter)- Why Are They Secure
I was recently using SHA512 as a means of encrypting a password for a login script and I got to wondering as to why encryptions are hard to crack.
I'll start with my question and then give it a little bit of explanation:
Why can't an encryption function be inverted easily such that
if enc(a)... | {"url":"http://www.dreamincode.net/forums/topic/324009-sha-encryption-or-any-for-that-matter-why-are-they-secure/","timestamp":"2014-04-21T05:41:28Z","content_type":null,"content_length":"132514","record_id":"<urn:uuid:25c9a9aa-3cff-42ee-a750-d85e6ae01ea3>","cc-path":"CC-MAIN-2014-15/segments/1397609539493.17/warc/CC-M... |
How to draw the US Flag mathematically?
Re: How to draw the US Flag mathematically?
Hi Sumasoltin;
I would have to copy the entire page to do that. Could be copyright problems.
In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists,... | {"url":"http://www.mathisfunforum.com/viewtopic.php?pid=215689","timestamp":"2014-04-18T05:56:41Z","content_type":null,"content_length":"33047","record_id":"<urn:uuid:99ac784c-7e86-4aba-9632-31cbd7226865>","cc-path":"CC-MAIN-2014-15/segments/1398223207985.17/warc/CC-MAIN-20140423032007-00390-ip-10-147-4-33.ec2.internal... |
Portfolio credit risk with ext
Assaf Zeevi
Portfolio credit risk with extremal dependence: Asymptotic analysis and efficient simulation
Coauthor(s): Achal Bassamboo, Sandeep Juneja.
Adobe Acrobat PDF
We consider the risk of a portfolio comprising loans, bonds, and financial instruments that are subject to possible defa... | {"url":"http://www0.gsb.columbia.edu/whoswho/more.cfm?uni=ajz2001&pub=3892","timestamp":"2014-04-19T02:30:49Z","content_type":null,"content_length":"5232","record_id":"<urn:uuid:be4631b8-d0f1-4178-a5e6-bdc923d3156e>","cc-path":"CC-MAIN-2014-15/segments/1397609535745.0/warc/CC-MAIN-20140416005215-00184-ip-10-147-4-33.ec... |
Probability of finishing in first three places of a race
October 10th 2010, 07:19 AM #1
Oct 2010
Probability of finishing in first three places of a race
If we have a 10 runner horse race and we perceive the probabilities of winning the as follows...
Horse 1 35%
Horse 2 15%
Horse 3 10%
Horse 4 1... | {"url":"http://mathhelpforum.com/statistics/159034-probability-finishing-first-three-places-race.html","timestamp":"2014-04-20T21:37:21Z","content_type":null,"content_length":"32913","record_id":"<urn:uuid:f3fcfc99-d538-4ccb-9a10-a7310daae487>","cc-path":"CC-MAIN-2014-15/segments/1397609539230.18/warc/CC-MAIN-201404160... |
Security Scene Errata
From: Declan McCullagh
To: politech@vorlon.mit.edu
---------- Forwarded message ----------
Date: Wed, 24 Jun 1998 12:31:21 -0500
From: Bruce Schneier
To: ryasin@cmp.com, stito@cmp.com, advancedinfo@email.msn.com
Subject: Comments on "Encryption is Key to Securing Data" 22 Jun 98
This note is to co... | {"url":"http://attrition.org/errata/media/art.0009.html","timestamp":"2014-04-17T22:04:35Z","content_type":null,"content_length":"7666","record_id":"<urn:uuid:6889aeb5-b371-4bb5-a61c-dacf73a62d22>","cc-path":"CC-MAIN-2014-15/segments/1397609532128.44/warc/CC-MAIN-20140416005212-00322-ip-10-147-4-33.ec2.internal.warc.gz... |
Martins Add, MD Math Tutor
Find a Martins Add, MD Math Tutor
...I have been playing chess since I was 8 years old. I've read multiple strategy books and am currently ranked #418/1364 on the itsyourturn.com chess ladder. I have been a Christian my entire
life, and I've been studying the Bible since I could read.
2... | {"url":"http://www.purplemath.com/martins_add_md_math_tutors.php","timestamp":"2014-04-20T08:50:57Z","content_type":null,"content_length":"24136","record_id":"<urn:uuid:825eeb08-c671-49b4-bc4c-64ad810bb382>","cc-path":"CC-MAIN-2014-15/segments/1397609538110.1/warc/CC-MAIN-20140416005218-00611-ip-10-147-4-33.ec2.interna... |
Margin of Safety
Margin of Safety (MOS):
The excess of actual or budgeted sales over the break even volume of sales is called margin of safety. At break even point costs are equal to sales revenue and profit is zero. Margin of safety,
therefore, tells us the amount of sales that can be dropped before losses begin to be... | {"url":"http://accountingexplanation.com/margin_of_safety.htm","timestamp":"2014-04-16T10:18:41Z","content_type":null,"content_length":"53967","record_id":"<urn:uuid:f114fa05-fefd-4bd5-bc46-1e84fccb7188>","cc-path":"CC-MAIN-2014-15/segments/1397609523265.25/warc/CC-MAIN-20140416005203-00349-ip-10-147-4-33.ec2.internal.... |
James has opted for a 20-payment life insurance policy of $200,000
• 1James has opted for a 20-payment life insurance policy of $200,000
James has opted for a 20-payment life insurance policy of $200,000. James is 42 years old. What is his annual premium?
• 2n insurance company wants to offer a new 5-year, leve... | {"url":"http://homework.boodom.com/q63895-s-James_has_opted_for_a_20-payment_life_insurance_policy_of_$200,000","timestamp":"2014-04-21T04:32:42Z","content_type":null,"content_length":"27791","record_id":"<urn:uuid:81cba17c-c31d-4a65-8f66-fb6abe640469>","cc-path":"CC-MAIN-2014-15/segments/1398223206770.7/warc/CC-MAIN-2... |
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how do you solve 25^(-3/4) without a calculator?
• one year ... | {"url":"http://openstudy.com/updates/5037d563e4b026c0470605b6","timestamp":"2014-04-19T02:18:55Z","content_type":null,"content_length":"220940","record_id":"<urn:uuid:8238f5a4-6c98-4ce3-ac1a-5cc98a812e5d>","cc-path":"CC-MAIN-2014-15/segments/1397609535745.0/warc/CC-MAIN-20140416005215-00512-ip-10-147-4-33.ec2.internal.... |
Re: st: Why do logit model coefficients produce signs opposite to those
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Re: st: Why do logit model coefficients produce signs opposite to those obtained from OLS?
From Maarten buis <maartenbuis@yahoo.co.uk>
To statalist@hsphsun2.harvard.... | {"url":"http://www.stata.com/statalist/archive/2010-02/msg00232.html","timestamp":"2014-04-18T03:03:07Z","content_type":null,"content_length":"7713","record_id":"<urn:uuid:8a652771-7bef-40ef-aa1c-c6fd1f7ec21b>","cc-path":"CC-MAIN-2014-15/segments/1398223211700.16/warc/CC-MAIN-20140423032011-00332-ip-10-147-4-33.ec2.int... |
[SOLVED] Optimization in Several Variables
December 9th 2008, 07:25 PM #1
[SOLVED] Optimization in Several Variables
F(x,y) = (2*y+1)*e^(x^2-y)
Find critical point and prove there is only one.
Use second derivative test to determine nature of crit. pt.
I know the procedure in solving it: set partial der... | {"url":"http://mathhelpforum.com/calculus/64259-solved-optimization-several-variables.html","timestamp":"2014-04-19T04:45:09Z","content_type":null,"content_length":"37350","record_id":"<urn:uuid:48e64dec-3552-42e6-ad1b-ef5b55f6cfc9>","cc-path":"CC-MAIN-2014-15/segments/1398223203422.8/warc/CC-MAIN-20140423032003-00256-... |
The Collatz conjecture is safe (for now)
A few days ago John Cook reported a draft paper claiming to solve the Collatz conjecture. Of course, since the Collatz conjecture is so simple to state, it constantly attracts tons of would-be
solvers, and most of the purported “proofs” they generate are not even worth mathemati... | {"url":"http://mathlesstraveled.com/2011/06/04/the-collatz-conjecture-is-safe-for-now/","timestamp":"2014-04-18T15:45:18Z","content_type":null,"content_length":"120532","record_id":"<urn:uuid:e2a62e3d-a434-4d05-add7-525429c3a98d>","cc-path":"CC-MAIN-2014-15/segments/1398223210034.18/warc/CC-MAIN-20140423032010-00381-ip... |
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one more....
• one year ago
• one year ago
Your question i... | {"url":"http://openstudy.com/updates/50f8c062e4b007c4a2ebd9e3","timestamp":"2014-04-17T03:59:26Z","content_type":null,"content_length":"54737","record_id":"<urn:uuid:a2fe5d42-9237-4afb-9ac0-82fbb0add08c>","cc-path":"CC-MAIN-2014-15/segments/1397609526252.40/warc/CC-MAIN-20140416005206-00591-ip-10-147-4-33.ec2.internal.... |
Figure 1: Dynamic logic operation example, finding cognitively related events in noise, in EEG signals. The searched processes are shown in Figure 1 at the bottom row. These events are “phase cones,”
circular events expanding or contracting in time (horizontal direction t, each time step is 5ms); in this case, two expa... | {"url":"http://www.hindawi.com/journals/cin/2011/454587/fig1/","timestamp":"2014-04-20T06:43:24Z","content_type":null,"content_length":"2330","record_id":"<urn:uuid:15295462-3703-41f6-bfb8-b163b16fc6bf>","cc-path":"CC-MAIN-2014-15/segments/1397609538022.19/warc/CC-MAIN-20140416005218-00603-ip-10-147-4-33.ec2.internal.w... |
Mathematics Describing the Real World: Precalculus and Trigonometry
University of FloridaPh.D., Dartmouth College
Video or Audio?
While this course works well in both formats, the video version features graphics to enhance your learning experience, including illustrations, images of... | {"url":"http://www.thegreatcourses.com/tgc/courses/course_detail.aspx?cid=1005","timestamp":"2014-04-17T00:59:52Z","content_type":null,"content_length":"238777","record_id":"<urn:uuid:15004d7f-c7df-4b2a-a24c-3d57b09e1171>","cc-path":"CC-MAIN-2014-15/segments/1397609526102.3/warc/CC-MAIN-20140416005206-00001-ip-10-147-4... |
There's been a huge kerfuffle in the quantum gravity community since this summer, when some people here at UCSB published a paper arguing that (old enough) black holes may actually be surrounded by a
wall of fire which burns people up when they cross the event horizon. This is huge, because if it were true it would up... | {"url":"http://www.wall.org/~aron/blog/firewalls/","timestamp":"2014-04-18T16:12:21Z","content_type":null,"content_length":"39968","record_id":"<urn:uuid:d7278c7b-15f2-43ac-83d6-2a23147814c9>","cc-path":"CC-MAIN-2014-15/segments/1398223207046.13/warc/CC-MAIN-20140423032007-00385-ip-10-147-4-33.ec2.internal.warc.gz"} |
Data-Driven Risk Models Could Help Target Pipeline Safety Inspections
by Rick Kowalewski, Pipeline and Hazardous Materials Safety Administration, and Peg Young, Ph.D., Bureau of Transportation Statistics
Federal safety agencies share a common problem—the need to target resources effectively to reduce risk. One way this... | {"url":"http://www.rita.dot.gov/bts/sites/rita.dot.gov.bts/files/publications/special_reports_and_issue_briefs/special_report/2008_010/html/entire.html","timestamp":"2014-04-20T13:28:23Z","content_type":null,"content_length":"54974","record_id":"<urn:uuid:1eabef6d-c157-42ca-8931-7f82e7c1c9b9>","cc-path":"CC-MAIN-2014-1... |
Size Functions for the Morphological Analysis of Melanocytic Lesions
International Journal of Biomedical Imaging
Volume 2010 (2010), Article ID 621357, 5 pages
Research Article
Size Functions for the Morphological Analysis of Melanocytic Lesions
^1Department of Mathematics, The Advanced Research Center on Electronic Sy... | {"url":"http://www.hindawi.com/journals/ijbi/2010/621357/","timestamp":"2014-04-19T21:24:31Z","content_type":null,"content_length":"57162","record_id":"<urn:uuid:d128577f-6f81-4296-a739-b147ccaa85d6>","cc-path":"CC-MAIN-2014-15/segments/1397609537376.43/warc/CC-MAIN-20140416005217-00473-ip-10-147-4-33.ec2.internal.warc... |
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Given the triangle below, what is cot∡B? Right triangle ABC wi... | {"url":"http://openstudy.com/updates/511525f4e4b0e554778b66d7","timestamp":"2014-04-20T06:36:13Z","content_type":null,"content_length":"52463","record_id":"<urn:uuid:b33194c6-fb0d-4b3c-b342-979ea358aefc>","cc-path":"CC-MAIN-2014-15/segments/1398223204388.12/warc/CC-MAIN-20140423032004-00117-ip-10-147-4-33.ec2.internal.... |
Few statistical measures for an image
December 11th 2010, 04:06 PM
Few statistical measures for an image
I'm not sure which section it belongs to, so I thought I should post in "others". The thing is I have a 3x3 matrix which represents a nine pixel square from grayscale image, so let's say the
matrix can have ... | {"url":"http://mathhelpforum.com/advanced-math-topics/165978-few-statistical-measures-image-print.html","timestamp":"2014-04-17T19:39:17Z","content_type":null,"content_length":"5171","record_id":"<urn:uuid:3913ef34-69ef-4f98-8700-41a3b943f73c>","cc-path":"CC-MAIN-2014-15/segments/1398223211700.16/warc/CC-MAIN-201404230... |
[SOLVED] Calculating residues of an even function, spot the mistake please
May 14th 2009, 05:12 AM
[SOLVED] Calculating residues of an even function, spot the mistake please
I'm having trouble with the following exercise:
let $U = - U$ be symmetric and $f: U \to \mathbb{C}$ meromorphic. Let $f$ be even, i.e. $f... | {"url":"http://mathhelpforum.com/calculus/88983-solved-calculating-residues-even-function-spot-mistake-please-print.html","timestamp":"2014-04-21T03:19:00Z","content_type":null,"content_length":"12120","record_id":"<urn:uuid:fadf4770-ca18-4aa4-ad0b-24dba6b76bba>","cc-path":"CC-MAIN-2014-15/segments/1397609539447.23/war... |
Hilbert transforms of measures
up vote 10 down vote favorite
Given a finite measure $\mu$ on the real line $\mathbb R$, one definition of its Hilbert transform is $(H\mu)(y) =\frac{1}{\pi}(PV)\int \frac{d\mu(x)}{x-y}$ which is known to exist almost everywhere
on $\mathbb R$. Another way is to define the Borel transform... | {"url":"http://mathoverflow.net/questions/59544/hilbert-transforms-of-measures?sort=oldest","timestamp":"2014-04-16T07:42:47Z","content_type":null,"content_length":"62022","record_id":"<urn:uuid:3f82c1ae-2b6a-48f2-b3e1-bef746fcc89e>","cc-path":"CC-MAIN-2014-15/segments/1397609521558.37/warc/CC-MAIN-20140416005201-00550... |
Math Quotes, Sayings about Mathematics
Math Quotes, Sayings about Mathematics - Page 2
One can always reason with reason.
What is algebra exactly; is it those three- cornered things?
- James Matthew Barrie
“Obvious” is the most dangerous word in mathematics.
- Eric Temple Bell
Young man, in mathematics you don’t under... | {"url":"http://www.coolnsmart.com/math_quotes/page/2/?sortby=popularity","timestamp":"2014-04-24T03:00:44Z","content_type":null,"content_length":"36548","record_id":"<urn:uuid:feeaaf68-03f5-4f8a-af7f-3b52ad9ce7b1>","cc-path":"CC-MAIN-2014-15/segments/1398223204388.12/warc/CC-MAIN-20140423032004-00546-ip-10-147-4-33.ec2... |
The left shift operator accept plain or long integers as arguments. The arguments are converted to a common type. It shifts the first argument to the left by the number of bits given by the second
A left shift by n bits is defined as multiplication with pow(2,n); for plain integers there is no overflow check so in that... | {"url":"http://www.effbot.org/pyref/operator-lshift.htm","timestamp":"2014-04-18T23:33:04Z","content_type":null,"content_length":"2111","record_id":"<urn:uuid:dea3b55d-a3f3-4229-993a-1eb70ca4f47e>","cc-path":"CC-MAIN-2014-15/segments/1398223206147.1/warc/CC-MAIN-20140423032006-00582-ip-10-147-4-33.ec2.internal.warc.gz"... |
Math Games
Statistics show that over the summer break, most students lose an average of two to three months of math computational skills they learned during the previous school year. This loss of learning can
mean an academic setback for some children that can take weeks, and in some cases months, to remedy when the s... | {"url":"http://www.mathgamesandactivities.com/tag/benefits-of-math-games/","timestamp":"2014-04-18T23:15:19Z","content_type":null,"content_length":"61806","record_id":"<urn:uuid:0d4c2bdb-6315-4900-af47-9b372db1b898>","cc-path":"CC-MAIN-2014-15/segments/1397609535535.6/warc/CC-MAIN-20140416005215-00520-ip-10-147-4-33.ec... |
El Segundo Algebra Tutor
...It is my goal to not only teach my students the material, but to give them the tools needed to succeed in all their classes. With the right tools and encouragement from myself, teachers and
parents, students are able to achieve great things.I earned my MBA from UCLA Anderson School of Ma... | {"url":"http://www.purplemath.com/El_Segundo_Algebra_tutors.php","timestamp":"2014-04-16T22:20:52Z","content_type":null,"content_length":"24051","record_id":"<urn:uuid:83e2908b-0875-4c6f-b237-cd1e892849a2>","cc-path":"CC-MAIN-2014-15/segments/1398223210034.18/warc/CC-MAIN-20140423032010-00172-ip-10-147-4-33.ec2.interna... |
Fourier Transform Help
August 4th 2011, 11:29 PM
Fourier Transform Help
I just need some clarification. I have been asked how to find the inverse rectangular pulse signal x(t) but I am not sure how to go about finding it. I guess what I have trouble understanding is
the "inverse rectangular pulse signal". I kno... | {"url":"http://mathhelpforum.com/advanced-applied-math/185639-fourier-transform-help-print.html","timestamp":"2014-04-18T10:07:02Z","content_type":null,"content_length":"17815","record_id":"<urn:uuid:c8ab6271-ef25-4ba3-9d98-65f8ec46bb6a>","cc-path":"CC-MAIN-2014-15/segments/1397609533121.28/warc/CC-MAIN-20140416005213-... |
Mplus Discussion >> Plausible values for Factor Score Estimates
Jonathon Little posted on Friday, December 03, 2010 - 4:47 pm
Given the following factor model:
CATEGORICAL = ANSWER1 ANSWER2 ANSWER3 ANSWER5 ANSWER6 ANSWER7 ANSWER8;
CLUSTER = id;
F1 BY answer1* answer2 answer3;
F2 BY answer4* answer5 answer6;
F1@1 F2@1;
... | {"url":"http://www.statmodel.com/cgi-bin/discus/discus.cgi?pg=next&topic=12&page=6392","timestamp":"2014-04-17T18:37:16Z","content_type":null,"content_length":"34180","record_id":"<urn:uuid:14973957-d297-4666-a183-f6d902ab69e2>","cc-path":"CC-MAIN-2014-15/segments/1398223205375.6/warc/CC-MAIN-20140423032005-00578-ip-10... |
My phraseology may not be the best here, but you get the idea. The proof is easy indeed, I could do it in my head (which is my excuse for not having it as polished as possible here).
It is obvious that for any given natural numbers m and n, either
is true, since √2 is irrational and therefore cannot be equal to a ratio... | {"url":"http://www.mathisfunforum.com/viewtopic.php?pid=54254","timestamp":"2014-04-20T08:36:49Z","content_type":null,"content_length":"30390","record_id":"<urn:uuid:d4cfc270-015a-40e5-ab03-6c443105aaaf>","cc-path":"CC-MAIN-2014-15/segments/1397609538110.1/warc/CC-MAIN-20140416005218-00565-ip-10-147-4-33.ec2.internal.w... |