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A Spreadsheet Model for Viral Growth
I worked with two companies in the past month that needed a way to model viral adoption as part of their effort to understand the impact of a strategic decision to deliver part or all of their
technology under an opensource license. Having such model enables them to understand the c... | {"url":"http://markdevisser.com/?p=268","timestamp":"2014-04-19T01:48:08Z","content_type":null,"content_length":"23219","record_id":"<urn:uuid:ae9f2508-7888-476d-aa8c-8693f10d3aea>","cc-path":"CC-MAIN-2014-15/segments/1397609535745.0/warc/CC-MAIN-20140416005215-00253-ip-10-147-4-33.ec2.internal.warc.gz"} |
Consequences of the Axiom of Choice Project
Consequences of the Axiom of Choice Project Homepage
It is with deep regret that we announce the death of Jean Rubin on October 25, 2002.
The book... | {"url":"http://consequences.emich.edu/CONSEQ.HTM","timestamp":"2014-04-20T23:27:08Z","content_type":null,"content_length":"4378","record_id":"<urn:uuid:bd8d7377-9c05-4d7b-b6f7-cf5ca4e90e76>","cc-path":"CC-MAIN-2014-15/segments/1397609539337.22/warc/CC-MAIN-20140416005219-00190-ip-10-147-4-33.ec2.internal.warc.gz"} |
Positions and Midpoints in Two Dimensions
5.2: Positions and Midpoints in Two Dimensions
Created by: CK-12
A digital graphic artist is designing a new company logo. Currently she is sketching a sample on graph paper to show her client, and needs to find the center of the text she has drawn so she can line
up the artwor... | {"url":"http://www.ck12.org/book/CK-12-Math-Analysis-Concepts/r1/section/5.2/","timestamp":"2014-04-19T03:10:11Z","content_type":null,"content_length":"149367","record_id":"<urn:uuid:eceefd13-c18d-4328-925c-615d65c353e1>","cc-path":"CC-MAIN-2014-15/segments/1397609535745.0/warc/CC-MAIN-20140416005215-00165-ip-10-147-4-... |
CMS/CSHPM Summer 2005 Meeting
Contributed Papers Session
Org: Peter Hoffman (Waterloo)
Berge defined a graph to be perfect if for every i... | {"url":"http://cms.math.ca/Events/summer05/abs/CP.html","timestamp":"2014-04-18T03:10:51Z","content_type":null,"content_length":"26813","record_id":"<urn:uuid:aa255e9a-caf2-4d9d-b3c3-8d5d91881997>","cc-path":"CC-MAIN-2014-15/segments/1398223207985.17/warc/CC-MAIN-20140423032007-00657-ip-10-147-4-33.ec2.internal.warc.gz... |
User Yuji Tachikawa
bio website
visits member for 4 years
seen Apr 9 at 0:21
stats profile views 3,631
There's no string-theory-overflow? Come on...
1d awarded Yearling
31 awarded Notable Question
Mar How can gauge theory techniques be useful to study when topological manifolds ca... | {"url":"http://mathoverflow.net/users/5420/yuji-tachikawa?tab=activity","timestamp":"2014-04-18T21:19:26Z","content_type":null,"content_length":"46343","record_id":"<urn:uuid:d4247d0c-8c23-4601-b2b8-2db9d2bd9f9d>","cc-path":"CC-MAIN-2014-15/segments/1397609535095.9/warc/CC-MAIN-20140416005215-00371-ip-10-147-4-33.ec2.i... |
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Post a reply
The function:
is very useful for calculating sums.
That's because:
If you want to calculate this:
, you may express the f(x) = x^i as:
where r(x) is the "remainder", which has less power than f(x).
Example for f(x)=x^1:
S_2 (x) = (x+1)^2-x^2=x^2+2x+1-x^2=2x+1
(S_2 (x))/2=x+1/2
f(x)=x^1=x=0.5 S_2(x) - 0.5 =... | {"url":"http://www.mathisfunforum.com/post.php?tid=3146&qid=32698","timestamp":"2014-04-16T13:28:56Z","content_type":null,"content_length":"20610","record_id":"<urn:uuid:c8d01bd6-77ec-4c64-9fc4-9b155f6ecacc>","cc-path":"CC-MAIN-2014-15/segments/1397609535095.9/warc/CC-MAIN-20140416005215-00634-ip-10-147-4-33.ec2.intern... |
About 33 Bits
See also: Sitemap
This is a blog about my research on privacy and anonymity. The title refers to the fact that there are only 6.6 billion people in the world, so you only need 33 bits (more precisely, 32.6 bits) of
information about a person to determine who they are.
This fact has two related consequence... | {"url":"http://33bits.org/about/","timestamp":"2014-04-21T07:37:12Z","content_type":null,"content_length":"50707","record_id":"<urn:uuid:a798b07a-156f-45c6-af8f-7ac0de4ca4b7>","cc-path":"CC-MAIN-2014-15/segments/1397609539665.16/warc/CC-MAIN-20140416005219-00340-ip-10-147-4-33.ec2.internal.warc.gz"} |
Family of Enriques surfaces and GRR, Part 2
up vote 3 down vote favorite
As I mentioned in my previous post, I am studying the article Moduli of Enriques surfaces and Grothendieck-Riemann-Roch.
The Grothendieck-Riemann-Roch theorem is applied there to show that, for any family of Enriques surfaces $f:Y\longrightarrow T... | {"url":"http://mathoverflow.net/questions/16984/family-of-enriques-surfaces-and-grr-part-2","timestamp":"2014-04-17T04:20:52Z","content_type":null,"content_length":"62678","record_id":"<urn:uuid:6d134368-7e6e-4623-a11b-890749e708ea>","cc-path":"CC-MAIN-2014-15/segments/1397609526252.40/warc/CC-MAIN-20140416005206-00243... |
Christine Doughty
Christine Doughty's Publications
Peer Reviewed Journal Publications
1. Tsang, C.-F., T.A. Buscheck, and C. Doughty, Aquifer thermal energy storage: a numerical simulation of Auburn University field experiments, Water Resour. Res., 17, 3, 647-658, 1981.
2. Doughty, C., G. Hellstrom, C.-F. Tsang, and ... | {"url":"http://esd.lbl.gov/about/staff/christinedoughty/publications.html","timestamp":"2014-04-18T19:22:28Z","content_type":null,"content_length":"60707","record_id":"<urn:uuid:5b856334-90c9-47c0-b074-71cdda735033>","cc-path":"CC-MAIN-2014-15/segments/1398223207985.17/warc/CC-MAIN-20140423032007-00035-ip-10-147-4-33.e... |
Basic Cryptology
The study of cryptography and cryptanalysis scientifically is known as Cryptology. It is math. For instance, number theory and algorithm that support cryptography and cryptanalysis. We will focus
here on some of key math concepts at th... | {"url":"http://cryptographicsoftware.com/index.php/cryptography/basic-cryptology/","timestamp":"2014-04-19T04:33:46Z","content_type":null,"content_length":"23467","record_id":"<urn:uuid:ef728989-6c58-45ce-82f2-23db5e444d23>","cc-path":"CC-MAIN-2014-15/segments/1398223206672.15/warc/CC-MAIN-20140423032006-00425-ip-10-14... |
November 6th 2005, 03:06 PM
Payments of $2600, due 50 days ago, and $3100, due in 40 days, are to be replaced by $3000 today and another payment in 30 days. What must the second payment be if the payee is to end up in an
equivalent financial position? Money now earns 8.25%. Use 30 days from now as the focal dat... | {"url":"http://mathhelpforum.com/business-math/1231-interest-print.html","timestamp":"2014-04-20T07:05:35Z","content_type":null,"content_length":"3966","record_id":"<urn:uuid:eb9437b2-29e7-4ca2-8370-d53af4cdaa76>","cc-path":"CC-MAIN-2014-15/segments/1397609538022.19/warc/CC-MAIN-20140416005218-00384-ip-10-147-4-33.ec2.... |
Physics Forums - View Single Post - CKM matrix parameters
I understand that a 3x3 unitary matrix needs 9 real parameters to be specified (18 real parameters to start with then 9 equations of constraint arising from unitarity), but what I'm struggling to
understand is how we can make phase changes of the form:
[tex] \m... | {"url":"http://www.physicsforums.com/showpost.php?p=3809339&postcount=1","timestamp":"2014-04-21T07:14:32Z","content_type":null,"content_length":"8923","record_id":"<urn:uuid:587a8aa0-adbb-46d2-b7c6-08e717d728c7>","cc-path":"CC-MAIN-2014-15/segments/1397609539665.16/warc/CC-MAIN-20140416005219-00246-ip-10-147-4-33.ec2.... |
Arithmetic operators perform operations of change-sign (negate), do-no-change-sign, logical AND logical OR, add, subtract, multiply and divide. Note that a value or an expression may fall between two
of these operators, either of which could take it as its left or right argument, as in
In such cases three rules apply:
... | {"url":"http://csounds.com/manual/html/adds.html","timestamp":"2014-04-17T13:10:44Z","content_type":null,"content_length":"9175","record_id":"<urn:uuid:e0ce17c9-a781-403d-9104-8966216672dd>","cc-path":"CC-MAIN-2014-15/segments/1397609530131.27/warc/CC-MAIN-20140416005210-00134-ip-10-147-4-33.ec2.internal.warc.gz"} |
Category Theoretic Modal Logic
Posted by David Corfield
I’ve mentioned before that it hasn’t been easy selling category theory to philosophers. At first glance this may be a little surprising when you consider what effects changes to the foundational
language of mathematics circa 1900 had on philosophy over subsequent ... | {"url":"http://golem.ph.utexas.edu/category/2011/04/category_theoretic_modal_logic.html","timestamp":"2014-04-19T22:14:47Z","content_type":null,"content_length":"73978","record_id":"<urn:uuid:f4f620ef-ce71-41ac-bcb0-3bdc00a75f4c>","cc-path":"CC-MAIN-2014-15/segments/1397609537754.12/warc/CC-MAIN-20140416005217-00389-ip... |
Nth term for diagonals/sides
April 29th 2010, 12:10 PM #1
Nth term for diagonals/sides
Find the nth term formula for the number of sides in a shape against how many diagonals this shape has.
I have the answer but is there I need workings because I do not know how to approach this.
Suppose a polygon has n ve... | {"url":"http://mathhelpforum.com/algebra/142161-nth-term-diagonals-sides.html","timestamp":"2014-04-20T18:00:56Z","content_type":null,"content_length":"38625","record_id":"<urn:uuid:a97a75f4-8816-49cd-a283-dd7a684208c3>","cc-path":"CC-MAIN-2014-15/segments/1397609538824.34/warc/CC-MAIN-20140416005218-00646-ip-10-147-4-... |
A molecular vibration occurs when atoms in a molecule are in periodic motion while the molecule as a whole has constant translational and rotational motion. The frequency of the periodic motion is
known as a vibration frequency, and the typical frequencies of molecular vibrations range from less than 10^12 to approxima... | {"url":"http://www.digplanet.com/wiki/Molecular_vibration","timestamp":"2014-04-21T13:09:34Z","content_type":null,"content_length":"69835","record_id":"<urn:uuid:9db2767d-d898-41f3-b7ba-9001cf33ad4f>","cc-path":"CC-MAIN-2014-15/segments/1397609539776.45/warc/CC-MAIN-20140416005219-00078-ip-10-147-4-33.ec2.internal.warc... |
Homotopy theory
Paths and cylinders
Homotopy groups
$(\infty,1)$-Category theory
Basic concepts
Universal constructions
Local presentation
Higher category theory
Basic concepts
Basic theorems
Universal constructions
Extra properties and structure
1-categorical presentations
The notion of $\infty$-groupoid is the genera... | {"url":"http://ncatlab.org/nlab/show/infinity-groupoid","timestamp":"2014-04-19T17:04:15Z","content_type":null,"content_length":"62622","record_id":"<urn:uuid:ea081e43-e8a2-4140-8d23-8be3e7af5bce>","cc-path":"CC-MAIN-2014-15/segments/1397609537308.32/warc/CC-MAIN-20140416005217-00409-ip-10-147-4-33.ec2.internal.warc.gz... |
The Science of Programming/Working on the Chain Gang
Sometimes, as SPT in CME, Chapter IX, points out, you find yourself puzzling over how to differentiate something complicated like:
$y = 3 (x^2 + 17)^2$
The approach is to make the expression simpler by abstracting away the detail. Let a be the polynomial:
$a =... | {"url":"http://en.m.wikibooks.org/wiki/The_Science_of_Programming/Working_on_the_Chain_Gang","timestamp":"2014-04-20T08:19:54Z","content_type":null,"content_length":"24075","record_id":"<urn:uuid:f4cc943b-2bd5-4160-8bc6-99081b6d05de>","cc-path":"CC-MAIN-2014-15/segments/1398223206118.10/warc/CC-MAIN-20140423032006-0011... |
Number bases
From Uncyclopedia, the content-free encyclopedia
Number bases are convenient ways of counting things invented by Indian mathematicians. All number and all forms of counting come originally from India. The most important thing to know is that the
Indians invented all numbers, numerals, and mathematics.
Digi... | {"url":"http://uncyclopedia.wikia.com/wiki/Number_bases?direction=prev&oldid=5470630","timestamp":"2014-04-19T18:32:23Z","content_type":null,"content_length":"75389","record_id":"<urn:uuid:132324af-4500-4d32-b3a7-0ec8a84fede5>","cc-path":"CC-MAIN-2014-15/segments/1397609537308.32/warc/CC-MAIN-20140416005217-00423-ip-10... |
FOM: modeling PRA in the physical world
Vladimir Sazonov sazonov at logic.botik.ru
Sat Mar 6 03:23:01 EST 1999
Stephen G Simpson wrote:
> In my posting of 1 Mar 1999 23:35:34 I suggested the following
> approach to f.o.m.:
> > to argue that PRA is consistent because the physical world provides
> > a model of it, and ... | {"url":"http://www.cs.nyu.edu/pipermail/fom/1999-March/002748.html","timestamp":"2014-04-16T22:10:21Z","content_type":null,"content_length":"7585","record_id":"<urn:uuid:eea55a16-ec2c-404f-8399-7acf798d6232>","cc-path":"CC-MAIN-2014-15/segments/1397609525991.2/warc/CC-MAIN-20140416005205-00089-ip-10-147-4-33.ec2.intern... |
Explain these please
August 1st 2012, 03:59 AM #1
Jul 2012
Explain these please
Q1.Reduce $sin^{4}\theta$ to an expression involving only function of multiples of $\theta$,raised to the first power.
Q2.How $2cos^{2}\theta=1+cos2\theta$
I would also like to know how to reduce any function to the first po... | {"url":"http://mathhelpforum.com/trigonometry/201596-explain-these-please.html","timestamp":"2014-04-16T15:03:44Z","content_type":null,"content_length":"34656","record_id":"<urn:uuid:c3fc678e-5c2f-4b9b-a648-c50caa5a1037>","cc-path":"CC-MAIN-2014-15/segments/1398223201753.19/warc/CC-MAIN-20140423032001-00612-ip-10-147-4... |
Exponential Smoothing Explained
Exponential Smoothing Explained.
When people first encounter the term Exponential Smoothing they may think
“that sounds like a hell of a lot of smoothing . . . whatever smoothing is".
They then start to envision a complicated mathematical calculation that likely requires a degree in math... | {"url":"http://www.inventoryops.com/articles/exponential_smoothing.htm","timestamp":"2014-04-18T03:08:37Z","content_type":null,"content_length":"26727","record_id":"<urn:uuid:bf390774-e0b6-4336-afae-5fac9c794f5b>","cc-path":"CC-MAIN-2014-15/segments/1397609532480.36/warc/CC-MAIN-20140416005212-00545-ip-10-147-4-33.ec2.... |
maps of heterogeneous media by photoacoustic
« journal navigation
Reconstruction of optical absorption coefficient maps of heterogeneous media by photoacoustic tomography coupled with diffusion equation based regularized Newton Method
Optics Express, Vol. 15, Issue 26, pp. 18076-18081 (2007)
We describe a novel reconst... | {"url":"http://www.opticsinfobase.org/vjbo/fulltext.cfm?uri=oe-15-26-18076&id=148546","timestamp":"2014-04-23T19:34:41Z","content_type":null,"content_length":"203755","record_id":"<urn:uuid:be6cf1f1-01b0-49f9-84d2-37d77180c124>","cc-path":"CC-MAIN-2014-15/segments/1398223203422.8/warc/CC-MAIN-20140423032003-00149-ip-10... |
Introduction to Climate Modelling
doesn't attempt a systematic introduction to climate modelling, but focuses on the fundamental dynamics of the atmospheric and oceanic circulations, along with approaches to their mathematical
formulation and numerical treatment. Some radiation balance models are covered, but there's n... | {"url":"http://dannyreviews.com/h/Climate_Modelling.html","timestamp":"2014-04-19T06:52:10Z","content_type":null,"content_length":"9656","record_id":"<urn:uuid:b1218280-8985-4b54-8311-6234db11b50a>","cc-path":"CC-MAIN-2014-15/segments/1398223206120.9/warc/CC-MAIN-20140423032006-00359-ip-10-147-4-33.ec2.internal.warc.gz... |
Calculus Optimization Problems: PLEASE HELP!!!
Click here to go to the NEW College Discussion Forum
Discus: SAT/ACT Tests and Test Preparation: Oc... | {"url":"http://www.collegeconfidential.com/discus/messages/69/29842.html","timestamp":"2014-04-19T19:44:54Z","content_type":null,"content_length":"10455","record_id":"<urn:uuid:b30b6e5c-08ec-44ab-a3aa-ace9d58f3b8e>","cc-path":"CC-MAIN-2014-15/segments/1397609537376.43/warc/CC-MAIN-20140416005217-00402-ip-10-147-4-33.ec... |
College Park, GA Math Tutor
Find a College Park, GA Math Tutor
...I have tutored for more than 10 years and have helped hundreds of students improve their test scores and grades and I have been rewarded as a top 100 WyzAnt tutor nationwide (50,000+ tutors).
I have a Ph.D. from one of the top universities in the cou... | {"url":"http://www.purplemath.com/college_park_ga_math_tutors.php","timestamp":"2014-04-19T09:47:30Z","content_type":null,"content_length":"24122","record_id":"<urn:uuid:374ab3fa-43ea-4ccd-a692-44fa41080f42>","cc-path":"CC-MAIN-2014-15/segments/1398223202548.14/warc/CC-MAIN-20140423032002-00158-ip-10-147-4-33.ec2.inter... |
Course Meeting Times
2 sessions per week / 1.5 hours per session
18.100 Analysis; and one of 18.06 Linear Algebra, 18.700 Linear Algebra, or 18.701 Algebra I.
Course Description
The two primary goals of many pure and applied scientific disciplines can be summarized as follows:
i. Formulate/devise a collection of mathe... | {"url":"http://ocw.mit.edu/courses/mathematics/18-152-introduction-to-partial-differential-equations-fall-2011/Syllabus/","timestamp":"2014-04-18T16:23:55Z","content_type":null,"content_length":"32473","record_id":"<urn:uuid:aa5ecf51-963d-4b28-9677-d61dbaf4b0c4>","cc-path":"CC-MAIN-2014-15/segments/1397609533957.14/war... |
Projectile Motion (while loop) - HELP NEEDED
June 7th, 2007, 04:21 PM #1
Junior Member
Join Date
Jun 2007
Projectile Motion (while loop) - HELP NEEDED
Hi everyone.... I'm new to the forum and new to Java programming.... I have a project with the following info.
1. A projectile is fired with a given initial ... | {"url":"http://forums.codeguru.com/showthread.php?425585-Projectile-Motion-(while-loop)-HELP-NEEDED","timestamp":"2014-04-19T15:22:54Z","content_type":null,"content_length":"83012","record_id":"<urn:uuid:0eb64919-8f42-45c9-bdb2-1f9b10481be2>","cc-path":"CC-MAIN-2014-15/segments/1397609537271.8/warc/CC-MAIN-201404160052... |
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Why do this problem?
Dominoes are a great resource and
this problem
is an intriguing way to use them. Not only does this activity require logical thinking but it is also an interesting way of practising addition and subtraction, and it provides an opportunity ... | {"url":"http://nrich.maths.org/146/note?nomenu=1","timestamp":"2014-04-18T11:03:09Z","content_type":null,"content_length":"6515","record_id":"<urn:uuid:e6829b29-82be-446e-9bba-6814408060fb>","cc-path":"CC-MAIN-2014-15/segments/1398223205375.6/warc/CC-MAIN-20140423032005-00658-ip-10-147-4-33.ec2.internal.warc.gz"} |
Surveying method for locating target subterranean bodies - Patent # 4957172 - PatentGenius
Surveying method for locating target subterranean bodies
4957172 Surveying method for locating target subterranean bodies
... | {"url":"http://www.patentgenius.com/patent/4957172.html","timestamp":"2014-04-19T17:41:22Z","content_type":null,"content_length":"74822","record_id":"<urn:uuid:30d52511-2856-41df-bc07-53b65f3cbe62>","cc-path":"CC-MAIN-2014-15/segments/1398223203235.2/warc/CC-MAIN-20140423032003-00078-ip-10-147-4-33.ec2.internal.warc.gz... |
Two-dimensional compressible flow in turbomachines with conic flow surfaces
Stanitz, John D
A general method of analysis is developed for two-dimensional, steady, compressible flow in stators or rotors of radial and mixed flow turbomachines with conic flow surfaces (surfaces of right
circular cones generated by center ... | {"url":"http://naca.central.cranfield.ac.uk/report.php?NID=3658","timestamp":"2014-04-19T22:05:33Z","content_type":null,"content_length":"2149","record_id":"<urn:uuid:4e214f9c-08a3-421f-8597-f4c358b1b5b4>","cc-path":"CC-MAIN-2014-15/segments/1397609537754.12/warc/CC-MAIN-20140416005217-00545-ip-10-147-4-33.ec2.internal... |
A zeta function using half of the primes
up vote 6 down vote favorite
It is well known that the zeta function satisfies the Euler product formula. See this wikipedia article.
Enumerate all primes by $p_1, p_2, \ldots $ in ascending order. Set $S$ to be the set of all $p_i$ where $i$ is odd. If, for $s > 1$, you define ... | {"url":"http://mathoverflow.net/questions/121148/a-zeta-function-using-half-of-the-primes","timestamp":"2014-04-19T20:04:47Z","content_type":null,"content_length":"49502","record_id":"<urn:uuid:c6e7d92a-edf0-4b1c-91e1-ebf5da68320f>","cc-path":"CC-MAIN-2014-15/segments/1397609537376.43/warc/CC-MAIN-20140416005217-00012-... |
A Collection of Tools for Multivariable Calculus
The mathlets presented here provide user-friendly tools for visualizing and manipulating basic objects of multivariable calculus: parametric surfaces in rectangular, spherical and cylindrical
coordinates, parametric curves, and graphs of functions of two variables. The u... | {"url":"http://www.math.uri.edu/~bkaskosz/flashmo/tools/","timestamp":"2014-04-18T08:04:08Z","content_type":null,"content_length":"3252","record_id":"<urn:uuid:6c69bdfc-5ddd-4a61-bced-c0d390f9ea52>","cc-path":"CC-MAIN-2014-15/segments/1398223206672.15/warc/CC-MAIN-20140423032006-00221-ip-10-147-4-33.ec2.internal.warc.g... |
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Ultimate Answer to Life, The Universe and Everything
Ultimate Answer to Life, The Universe and Everything
Is there a real purpose of Life, The Universe and Everything apart from this?
'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'
'God exists because ... | {"url":"http://www.mathisfunforum.com/viewtopic.php?pid=256324","timestamp":"2014-04-17T21:49:51Z","content_type":null,"content_length":"33867","record_id":"<urn:uuid:20e2c886-9157-4f2f-a12e-d1f84f68a4c8>","cc-path":"CC-MAIN-2014-15/segments/1397609532128.44/warc/CC-MAIN-20140416005212-00135-ip-10-147-4-33.ec2.internal... |
Revêtements étales et groupe fondamental
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, 2005
"... We develop in detail most of the theory of the Picard scheme that Grothendieck sketched in two Bourbaki talks and in commentaries on them. Also, we review in brief much of the rest of the theory
developed by Grothendieck and by others. But we be... | {"url":"http://citeseerx.ist.psu.edu/showciting?cid=1114626","timestamp":"2014-04-19T19:47:08Z","content_type":null,"content_length":"34162","record_id":"<urn:uuid:261df0da-a227-4a5f-9d94-c378764b0e6e>","cc-path":"CC-MAIN-2014-15/segments/1397609537376.43/warc/CC-MAIN-20140416005217-00616-ip-10-147-4-33.ec2.internal.wa... |
Preventing Rounding Errors
up vote 2 down vote favorite
I was just reading about rounding errors in C++. So, if I'm making a math intense program (or any important calculations) should I just drop floats all together and use only doubles or is there an
easier way to prevent rounding errors?
c++ rounding-error
2 What m... | {"url":"http://stackoverflow.com/questions/6759910/preventing-rounding-errors","timestamp":"2014-04-24T06:35:36Z","content_type":null,"content_length":"78697","record_id":"<urn:uuid:05f68bb5-625a-42f0-b837-cd9241878994>","cc-path":"CC-MAIN-2014-15/segments/1398223205375.6/warc/CC-MAIN-20140423032005-00378-ip-10-147-4-3... |
There were 3000 bacteria in a petri dish 10 hours ago. Now there are only 2000.
How would you calculate how many... - Homework Help - eNotes.com
There were 3000 bacteria in a petri dish 10 hours ago. Now there are only 2000.
How would you calculate how many bacteria there will be 5 hours later and at what percentage th... | {"url":"http://www.enotes.com/homework-help/there-were-3000-bacteria-petri-dish-10-hours-ago-424650","timestamp":"2014-04-20T09:14:33Z","content_type":null,"content_length":"27010","record_id":"<urn:uuid:3cbdf216-2d0c-44e5-ba7f-498ffe544c5c>","cc-path":"CC-MAIN-2014-15/segments/1397609538110.1/warc/CC-MAIN-201404160052... |
Simultaneity Spacetime Diagram Model
Simultaneity Spacetime Diagram Model Relations
Open Source Physics Related Resources
relation created by Wolfgang Christian
The Easy Java Simulations Modeling and Authoring Tool is needed to explore the computational model used in the Simultaneity Spacetime Diagram Model.
Othe... | {"url":"http://www.compadre.org/OSP/items/Relations.cfm?ID=10383","timestamp":"2014-04-18T05:53:27Z","content_type":null,"content_length":"11507","record_id":"<urn:uuid:379c3f20-5954-45cc-aa78-008516b0f749>","cc-path":"CC-MAIN-2014-15/segments/1397609532573.41/warc/CC-MAIN-20140416005212-00407-ip-10-147-4-33.ec2.intern... |
[A Trivial Problem] adj(AB) = adj(A)adj(B)
September 23rd 2008, 07:52 PM #1
Dec 2007
[A Trivial Problem] adj(AB) = adj(A)adj(B)
I want to know how to prove that adj(AB) = adj(B)adj(A), letting adj (A) be the adjugate matrix of A.
I feel the equation adj(A)A = |A|E does not help much.
P.S: I wrongly type... | {"url":"http://mathhelpforum.com/advanced-algebra/50369-trivial-problem-adj-ab-adj-adj-b.html","timestamp":"2014-04-19T03:27:52Z","content_type":null,"content_length":"62075","record_id":"<urn:uuid:8666431f-1054-432d-acb2-9227deae2d61>","cc-path":"CC-MAIN-2014-15/segments/1397609535745.0/warc/CC-MAIN-20140416005215-002... |
Hierarchical parallelization of gene differential association analysis.
Jump to Full Text
MedLine PMID: 21936916 Owner: NLM Status: MEDLINE
Abstract/ BACKGROUND: Microarray gene differential expression analysis is a widely used technique that deals with high dimensional data and is computatio... | {"url":"http://www.biomedsearch.com/nih/Hierarchical-Parallelization-Gene-Differential-Association/21936916.html","timestamp":"2014-04-17T04:52:38Z","content_type":null,"content_length":"67969","record_id":"<urn:uuid:c509ca76-b25e-483c-b4c8-3c52aa171499>","cc-path":"CC-MAIN-2014-15/segments/1397609526252.40/warc/CC-MAI... |
irreducible constituent in Normal subgroup
up vote 1 down vote favorite
Let $G$ be a finite group and $N$ be a normal subgoup of G. Suppose that $\chi \in Irr(G)$. If $\theta , \lambda \in Irr(N)$, such that $[\chi_{N}, \theta]>0$ , $[\chi_{N}, \lambda]>0$, is it true
that $\theta(1)=\lambda(1)$?
On the other hand, irr... | {"url":"http://mathoverflow.net/questions/105513/irreducible-constituent-in-normal-subgroup","timestamp":"2014-04-20T01:03:55Z","content_type":null,"content_length":"48295","record_id":"<urn:uuid:c5ff5933-6eb8-4424-8c48-680e7284fc2f>","cc-path":"CC-MAIN-2014-15/segments/1397609537804.4/warc/CC-MAIN-20140416005217-00402... |
Two's complement with unsigned integers
I thought that the compiler would know because both operands are of the same type - and therefore assume that no casting/conversion is necessary.
If I run the same experiment with unsigned int, I get the expected result. The size of an unsigned int in my system is 4 bytes (32 bit... | {"url":"http://www.cplusplus.com/forum/beginner/80507/","timestamp":"2014-04-18T03:03:41Z","content_type":null,"content_length":"13022","record_id":"<urn:uuid:e80df142-cbae-4261-af72-eb8e2ab915ef>","cc-path":"CC-MAIN-2014-15/segments/1397609532480.36/warc/CC-MAIN-20140416005212-00229-ip-10-147-4-33.ec2.internal.warc.gz... |
(data structure)
Definition: A graph whose edges are unordered pairs of vertices, and the same pair of vertices can be connected by multiple edges.
Formal Definition: Same as graph, but E is a bag of edges, not a set.
Generalization (I am a kind of ...)
Aggregate parent (I am a part of or used in ...)
Christofides algo... | {"url":"http://xlinux.nist.gov/dads/HTML/multigraph.html","timestamp":"2014-04-16T04:12:31Z","content_type":null,"content_length":"2915","record_id":"<urn:uuid:02dffbf3-8a66-4ee0-b83b-5e9de8c1fc38>","cc-path":"CC-MAIN-2014-15/segments/1397609521512.15/warc/CC-MAIN-20140416005201-00473-ip-10-147-4-33.ec2.internal.warc.g... |
Polymorphism is Set Theoretic, Constructively
We consider models in toposes of equational theories over the type system consisting of the Girard-Reynolds polymorphic lambda calculus augmented with finite product types. The particular notion of
model we use is very straightforward, with polymorphic product types and fun... | {"url":"http://www.cl.cam.ac.uk/~amp12/papers/polist/polist.html","timestamp":"2014-04-16T07:50:04Z","content_type":null,"content_length":"1893","record_id":"<urn:uuid:1d73ebef-f4a3-4bdc-8d82-e14afecf3ef7>","cc-path":"CC-MAIN-2014-15/segments/1397609533121.28/warc/CC-MAIN-20140416005213-00091-ip-10-147-4-33.ec2.interna... |
determinat value
May 13th 2012, 05:54 AM #1
Jan 2011
determinat value
if A is symmetric matrix of odd order and a[ii]=0 for all i then prove that determinant of A is an even number.
please explain.
Re: determinat value
Has the matrix real entries?
Re: determinat value
yes, the entries are integers, ... | {"url":"http://mathhelpforum.com/advanced-algebra/198756-determinat-value.html","timestamp":"2014-04-19T21:21:20Z","content_type":null,"content_length":"34090","record_id":"<urn:uuid:574b2f34-d2df-4a0f-89f8-50e23885dc91>","cc-path":"CC-MAIN-2014-15/segments/1397609537376.43/warc/CC-MAIN-20140416005217-00288-ip-10-147-4... |
Centralhatchee, GA Math Tutor
Find a Centralhatchee, GA Math Tutor
...I have taught for four years in a public school setting and am now looking to extend my skills into private tutoring. I was a Science major at the University of Georgia, then decided I wanted
to teach and received my teaching certificate. Recentl... | {"url":"http://www.purplemath.com/Centralhatchee_GA_Math_tutors.php","timestamp":"2014-04-20T21:17:21Z","content_type":null,"content_length":"24106","record_id":"<urn:uuid:bbe16fbc-d312-46cd-80fe-8c4cf3486586>","cc-path":"CC-MAIN-2014-15/segments/1397609539230.18/warc/CC-MAIN-20140416005219-00493-ip-10-147-4-33.ec2.int... |
Syllabus For Preliminary Examination In CAD
Revised March 2011
Prelim Format
• Each student will be examined by the entire group of examiners. The exam will last about 1h; expect 3 questions of 20m each. The format is oral. As a... | {"url":"http://www.eecs.berkeley.edu/GradAffairs/EE/Prelims/Syllabi/cad.des.html","timestamp":"2014-04-16T07:17:52Z","content_type":null,"content_length":"20836","record_id":"<urn:uuid:6170a32e-15a2-4467-9197-a892481cccb5>","cc-path":"CC-MAIN-2014-15/segments/1397609521558.37/warc/CC-MAIN-20140416005201-00407-ip-10-147... |
Mathematical Institute
The Mathematical Institute is the centre for mathematical activity at the University of Oxford. It is one of ten departments under the Mathematical, Physical and Life Sciences Divisional Board.
The history of mathematics at Oxford is described in Oxford Mathematics and Mathematicians, the text of... | {"url":"http://www.maths.ox.ac.uk/about","timestamp":"2014-04-19T02:10:19Z","content_type":null,"content_length":"24643","record_id":"<urn:uuid:aa6f7396-8bdc-45e8-9657-3a9c9329e0e1>","cc-path":"CC-MAIN-2014-15/segments/1397609535745.0/warc/CC-MAIN-20140416005215-00590-ip-10-147-4-33.ec2.internal.warc.gz"} |
Gábor Szegő
Born: 20 January 1895 in Kunhegyes, Hungary
Died: 7 August 1985 in Palo Alto, California USA
Gábor Szegő was born in Kunhegyes, a small town in Hungary about 120 km southeast of Budapest. His undergraduate studies were undertaken in Budapest.
After attending university in Budapest, Szegő went to Berlin wher... | {"url":"http://www-groups.dcs.st-and.ac.uk/~history/Printonly/Szego.html","timestamp":"2014-04-20T18:54:39Z","content_type":null,"content_length":"3940","record_id":"<urn:uuid:c2f8b4db-9732-4b68-a88d-2939fd3110a1>","cc-path":"CC-MAIN-2014-15/segments/1397609539066.13/warc/CC-MAIN-20140416005219-00063-ip-10-147-4-33.ec2... |
Either I'm wrong or the book is!
February 28th 2010, 03:16 AM #1
Feb 2010
Either I'm wrong or the book is!
Hi guys!
Here's the problem (fairly simple but I'm still getting it wrong with the book's result...):
A yearly output of a silver mine is found to be decreasing by 25% of it's previous year's outpu... | {"url":"http://mathhelpforum.com/algebra/131158-either-i-m-wrong-book.html","timestamp":"2014-04-16T06:04:41Z","content_type":null,"content_length":"47923","record_id":"<urn:uuid:8b2f4745-444f-4179-bcba-d2b0d4a77d61>","cc-path":"CC-MAIN-2014-15/segments/1397609521512.15/warc/CC-MAIN-20140416005201-00008-ip-10-147-4-33.... |
Strand of the Web
Heather Logan's...
Strand of the Web
I'm currently a postdoc in the Theoretical Physics department at Fermilab. In September 2002 I'll be moving to the University of Wisconsin, Madison for a postdoc position.
At the moment I'm working on supersymmetry and Higgs phenomenology for current and future col... | {"url":"http://theory.fnal.gov/people/logan/","timestamp":"2014-04-17T13:03:50Z","content_type":null,"content_length":"6553","record_id":"<urn:uuid:486108f8-b6c9-440b-bdd9-966f4a59f22a>","cc-path":"CC-MAIN-2014-15/segments/1397609530131.27/warc/CC-MAIN-20140416005210-00642-ip-10-147-4-33.ec2.internal.warc.gz"} |
Moderated Regression
Suppose that we would like to learn whether the above mediational model holds across levels of a moderator variable that has 5 mutually exclusive categories. That is, we would like to learn whether
the mediational model interacts with another variable. To test this, we can use a
macro in SPSS
that ... | {"url":"http://psychweb.psy.umt.edu/denis/datadecision/reg/moderation.html","timestamp":"2014-04-17T21:30:21Z","content_type":null,"content_length":"57647","record_id":"<urn:uuid:a415df16-805a-4fd7-a02f-bd175aaaa122>","cc-path":"CC-MAIN-2014-15/segments/1398223207046.13/warc/CC-MAIN-20140423032007-00126-ip-10-147-4-33.... |
What is the area of a square with sides of length 13 yards?
United States customary units are a system of measurements commonly used in the United States. The U.S. customary system developed from English units which were in use in the British Empire
before American independence. Consequently most U.S. units... | {"url":"http://answerparty.com/question/answer/what-is-the-area-of-a-square-with-sides-of-length-13-yards","timestamp":"2014-04-18T04:07:46Z","content_type":null,"content_length":"28398","record_id":"<urn:uuid:91b4ec09-c63e-4fa6-912a-09505d6a4d14>","cc-path":"CC-MAIN-2014-15/segments/1397609532480.36/warc/CC-MAIN-20140... |
Student Learning, Outcomes Assessment and Accreditation
Outcome Statements for Physics Majors
Physics Standards Document – September 2001
1.0 Process Standards
1.1. Critical Thinking and Problem Solving
1.1.1 Skill inventory
1. Deduction
2. Inference
3. Reasoning
4. Formulating questions
5. Order of magnitude estimati... | {"url":"http://web.uri.edu/assessment/uri/physics/","timestamp":"2014-04-20T20:56:45Z","content_type":null,"content_length":"58328","record_id":"<urn:uuid:37ae9126-fca5-4a53-8f30-9bd6cb09e12e>","cc-path":"CC-MAIN-2014-15/segments/1398223207985.17/warc/CC-MAIN-20140423032007-00650-ip-10-147-4-33.ec2.internal.warc.gz"} |
Subsets of Non-Measurable sets
March 14th 2010, 07:59 AM #1
Feb 2010
Subsets of Non-Measurable sets
We know there exists a non-measurable subset in [0,1). Call it P.
P is a non-measurable set constructed by identifying the interval [0,1)
with the unit circle in R^2. If I can find it online, I'll post a ... | {"url":"http://mathhelpforum.com/differential-geometry/133739-subsets-non-measurable-sets.html","timestamp":"2014-04-19T18:44:07Z","content_type":null,"content_length":"32424","record_id":"<urn:uuid:31b87092-4349-401e-95f8-5a5e00fdc0f7>","cc-path":"CC-MAIN-2014-15/segments/1397609537308.32/warc/CC-MAIN-20140416005217-0... |
Common Core Standards
Applying the Common Core Standards for High School Mathematics
To meet many of the Common Core Standards for geometry you can use Mathematics: A Very Short Introduction and Symmetry: A Very Short Introduction.
Geometry » Congruence
Experiment with transformations in the plane
• CCSS.Math.Content... | {"url":"http://www.veryshortintroductions.com/page/common-core-standards","timestamp":"2014-04-19T07:07:08Z","content_type":null,"content_length":"46207","record_id":"<urn:uuid:82e776c8-4317-40c1-abad-746fdde2a7c0>","cc-path":"CC-MAIN-2014-15/segments/1397609536300.49/warc/CC-MAIN-20140416005216-00099-ip-10-147-4-33.ec... |
simplicial groupoid
simplicial groupoid
Higher category theory
Basic concepts
Basic theorems
Universal constructions
Extra properties and structure
1-categorical presentations
It is probably best to distinguish between the following:
• A simplicial groupoid is a simplicial object in Cat (that is, a functor from $\Del... | {"url":"http://ncatlab.org/nlab/show/simplicial+groupoid","timestamp":"2014-04-19T02:29:16Z","content_type":null,"content_length":"28349","record_id":"<urn:uuid:95145db9-5bf2-4e39-ace8-b70f90471652>","cc-path":"CC-MAIN-2014-15/segments/1397609535745.0/warc/CC-MAIN-20140416005215-00432-ip-10-147-4-33.ec2.internal.warc.g... |
Equal Chance
A bag contains n discs, made up of red and blue colours. Two discs are removed from the bag.
If the probability of selecting two discs of the same colour is 1/2, what can you say about the number of discs in the bag?
Problem ID: 146 (Jan 2004) Difficulty: 3 Star | {"url":"http://mathschallenge.net/view/equal_chance","timestamp":"2014-04-17T12:30:50Z","content_type":null,"content_length":"4180","record_id":"<urn:uuid:1b7b1705-e1d4-404e-949e-86129191c8aa>","cc-path":"CC-MAIN-2014-15/segments/1398223202457.0/warc/CC-MAIN-20140423032002-00018-ip-10-147-4-33.ec2.internal.warc.gz"} |
Use standard identities to express
1. The problem statement, all variables and given/known data
Use standard identities to express sin(x+pi/3) in terms of sin x and cos x
2. Relevant equations
3. The attempt at a solution
0.5sinx + 0.8660cosx
I'm just not sure if i need to simplify it even further and hopefully I'm on ... | {"url":"http://www.physicsforums.com/showthread.php?p=3850472","timestamp":"2014-04-20T23:34:30Z","content_type":null,"content_length":"27557","record_id":"<urn:uuid:28b8c7f9-591d-4c0e-a16f-625302873ce4>","cc-path":"CC-MAIN-2014-15/segments/1398223206770.7/warc/CC-MAIN-20140423032006-00015-ip-10-147-4-33.ec2.internal.w... |
perlmeditation lin0 <p>Fellow Monks</p> <p>I wanted to share with you an article I found in the [http://www.jstatsoft.org/|Journal of Statistical Software]. The article is titled [http://
www.jstatsoft.org/v11/i01/paper|Using Perl for Statistics: Data Processing and Statistical Computing] and was written by [http://www... | {"url":"http://www.perlmonks.org/index.pl?displaytype=xml;node_id=585987","timestamp":"2014-04-17T17:18:27Z","content_type":null,"content_length":"3021","record_id":"<urn:uuid:00c197e8-b787-48dd-985a-d02c7c8fe05a>","cc-path":"CC-MAIN-2014-15/segments/1397609530136.5/warc/CC-MAIN-20140416005210-00019-ip-10-147-4-33.ec2.... |
Resolution: standard / high
Figure 3.
Correlates of anhedonia.A: Correlation coefficients for all pairwise correlations between questionnaire measures. All are highly significant (p<.01), except for the correlation between anhedonic
depression and anxious anxiety, denoted by a red dot. B: Hierarchical weighted regres... | {"url":"http://www.biolmoodanxietydisord.com/content/3/1/12/figure/F3?highres=y","timestamp":"2014-04-20T10:47:39Z","content_type":null,"content_length":"13068","record_id":"<urn:uuid:6b236890-5b64-401a-92ad-df1ffc30f352>","cc-path":"CC-MAIN-2014-15/segments/1398223206118.10/warc/CC-MAIN-20140423032006-00013-ip-10-147-... |
My conversations with gullible machines...
I wrote up a small program to find prime-numbers between x and y ; implemented the Sieve of Eratosthenes.
The SOE is basically where you take all numbers (say 1-100) into an array. Cross out 1. Loop from 2-Sqrt(N) i.e. 2-10. Now cross out every multiple of 2 in the array. Next... | {"url":"http://madcoderspeak.blogspot.com/2009/04/i-wrote-up-small-program-to-find-prime.html","timestamp":"2014-04-19T19:48:15Z","content_type":null,"content_length":"108968","record_id":"<urn:uuid:ffd8ce8b-60b8-4604-8431-84f7ac68feb8>","cc-path":"CC-MAIN-2014-15/segments/1398223206120.9/warc/CC-MAIN-20140423032006-00... |
normal distribution question
September 8th 2009, 04:11 AM #1
Sep 2009
normal distribution question
I'm trying to find an answer to the following problem. Any help will be greatly appreciated.
I have a normally-distributed variable X with a mean of 1000 and a some variance (let's assume 1).
I choose a ra... | {"url":"http://mathhelpforum.com/advanced-statistics/101118-normal-distribution-question.html","timestamp":"2014-04-18T06:59:40Z","content_type":null,"content_length":"57738","record_id":"<urn:uuid:52b21af5-1bd4-4a4b-b0e0-8f81c9e664d1>","cc-path":"CC-MAIN-2014-15/segments/1397609532573.41/warc/CC-MAIN-20140416005212-00... |
Orangevale Math Tutor
...Success is imminent - take the plunge. What are the chances of your passing your stats and probability course? If you're in doubt, my 36 years of helping hundreds of students be successful will
definitely improve your odds.
15 Subjects: including algebra 1, algebra 2, calculus, geometry
... | {"url":"http://www.purplemath.com/Orangevale_Math_tutors.php","timestamp":"2014-04-19T23:24:05Z","content_type":null,"content_length":"23901","record_id":"<urn:uuid:43b445f7-51ed-454e-bf4d-ec5781e5265c>","cc-path":"CC-MAIN-2014-15/segments/1397609537754.12/warc/CC-MAIN-20140416005217-00265-ip-10-147-4-33.ec2.internal.w... |
Wolfram Demonstrations Project
Distance of a Point to a Segment
The distance of a point to a segment is the length of the shortest line joining the point to a point on the segment. This Demonstration depicts this shortest line as dotted. The measurements are
normalized so that the point starts at a distance of 1 to the... | {"url":"http://demonstrations.wolfram.com/DistanceOfAPointToASegment/","timestamp":"2014-04-20T18:26:29Z","content_type":null,"content_length":"42304","record_id":"<urn:uuid:5ad299c4-c18e-4cfc-af3a-f92a6595c00c>","cc-path":"CC-MAIN-2014-15/segments/1397609539066.13/warc/CC-MAIN-20140416005219-00654-ip-10-147-4-33.ec2.i... |
Woodacre SAT Math Tutor
Find a Woodacre SAT Math Tutor
...I look forward to talking with parents about their concerns for their students. We CAN make a difference!The study of psychology at all levels, from high school through undergraduate, Master's
and Doctoral levels, including statistics, experimental design an... | {"url":"http://www.purplemath.com/woodacre_sat_math_tutors.php","timestamp":"2014-04-20T13:44:11Z","content_type":null,"content_length":"23866","record_id":"<urn:uuid:74556441-8fc2-4674-999a-7f19b345430d>","cc-path":"CC-MAIN-2014-15/segments/1397609538787.31/warc/CC-MAIN-20140416005218-00120-ip-10-147-4-33.ec2.internal... |
The familiar trigonometric functions can be geometrically derived from a circle.
But what if, instead of the circle, we used a regular polygon?
In this animation, we see what the “polygonal sine” looks like for the square and the hexagon. The polygon is such that the inscribed circle has radius 1.
We’ll kee... | {"url":"http://lovecaitlin.tumblr.com/","timestamp":"2014-04-19T22:36:26Z","content_type":null,"content_length":"84270","record_id":"<urn:uuid:43005118-6552-4c8a-96b5-8766bcd5b2e1>","cc-path":"CC-MAIN-2014-15/segments/1397609537754.12/warc/CC-MAIN-20140416005217-00087-ip-10-147-4-33.ec2.internal.warc.gz"} |
middle term / factor question..
I'm kinda banging my head for this one. Is this one has middle term? 3x^2+6x-3 ? Help me plz. tx
Well, divide by 3 to start: x^2 + 2x - 1 Now explain your question! If it was x^2 + 2x + 1, then that would factor to (x + 1)^2
As Wilmer said, you factor out the "3" in each term: $3(x^2+ 2x... | {"url":"http://mathhelpforum.com/algebra/201344-middle-term-factor-question.html","timestamp":"2014-04-21T00:21:19Z","content_type":null,"content_length":"78316","record_id":"<urn:uuid:b3dd750c-fbf5-4ef6-ba2f-0051e0bf3e83>","cc-path":"CC-MAIN-2014-15/segments/1397609539337.22/warc/CC-MAIN-20140416005219-00079-ip-10-147... |
Test Your Wits on These Mathematical Puzzles (Mar, 1932)
The Four Color Theorem was not proven until 1976 and required the use of a computer.
I’m pretty sure the thing about arabic numerals representing the number of angles in their characters is total B.S.
Test Your Wits on These Mathematical Puzzles
by WILLIA... | {"url":"http://blog.modernmechanix.com/tag/math/","timestamp":"2014-04-19T22:29:22Z","content_type":null,"content_length":"70368","record_id":"<urn:uuid:82722eac-15bc-4d80-84e6-f8ca6aa0a8a7>","cc-path":"CC-MAIN-2014-15/segments/1397609537754.12/warc/CC-MAIN-20140416005217-00385-ip-10-147-4-33.ec2.internal.warc.gz"} |
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Here's the question you clicked on:
What is the slope of the line between (3, –4) and (–2, 1)?
•... | {"url":"http://openstudy.com/updates/5005098de4b0fb99113475d3","timestamp":"2014-04-19T07:09:55Z","content_type":null,"content_length":"77177","record_id":"<urn:uuid:209dfdfe-1bc1-4bf2-ab75-8727049ea9ee>","cc-path":"CC-MAIN-2014-15/segments/1397609536300.49/warc/CC-MAIN-20140416005216-00263-ip-10-147-4-33.ec2.internal.... |
polygonal number
polygonal number
A polygonal number, or figurate number, is any value of the function
for integers $n\geq 0$ and $d\geq 3$. A “generalized polygonal number” is any value of $P_{d}(n)$ for some integer $d\geq 3$ and any $n\in\mathbb{Z}$. For fixed $d$, $P_{d}(n)$ is called a $d$-gonal
or $d$-polygonal n... | {"url":"http://planetmath.org/PolygonalNumber","timestamp":"2014-04-16T13:16:56Z","content_type":null,"content_length":"69034","record_id":"<urn:uuid:3fdd9184-0adc-49c4-8eb8-4d2febb492ff>","cc-path":"CC-MAIN-2014-15/segments/1397609523429.20/warc/CC-MAIN-20140416005203-00214-ip-10-147-4-33.ec2.internal.warc.gz"} |
Warriors Scouting Report: Tracking Potentially Assisted Spot-Up Jumpers using Synergy
I posted the following on Golden State of Mind yesterday.
The idea of "potential assists" is interesting to me. One of the weaknesses of box score stats is that assists are recorded, but not passes which would have been assists, if th... | {"url":"http://www.d3coder.com/thecity/2011/07/29/warriors-scouting-report-tracking-potentially-assisted-spot-up-jumpers-using-synergy/","timestamp":"2014-04-19T22:06:26Z","content_type":null,"content_length":"77993","record_id":"<urn:uuid:0a7f87c5-5138-4e36-9c12-ba85cfead066>","cc-path":"CC-MAIN-2014-15/segments/13982... |
James Gregory and the Pappus-Guldin Theorem - A Ratio Between the Trunk and the Solid of Revolution
Gregory treats separately the ratio between the trunk and the solid of revolution and the ratio between the trunk and the cylinder. The key to understanding the first ratio is Cavalieri's Principle:
"If two plane (or sol... | {"url":"http://www.maa.org/publications/periodicals/convergence/james-gregory-and-the-pappus-guldin-theorem-a-ratio-between-the-trunk-and-the-solid-of-revolution","timestamp":"2014-04-20T09:09:21Z","content_type":null,"content_length":"106299","record_id":"<urn:uuid:03acca93-0380-404e-9c29-ebdbef419588>","cc-path":"CC-... |
Yahoo Groups
GEOSTATS: 1) stationary mean, 2) correl. dimension
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Dear all out there,
I have got 2 (maybe very basic) questions, the first one about the
requirement of stationary mean in semivariance analysis, the 2. about the
correlation dimension of fractal analysis.
... | {"url":"https://groups.yahoo.com/neo/groups/ai-geostats/conversations/topics/1610","timestamp":"2014-04-19T07:09:44Z","content_type":null,"content_length":"41601","record_id":"<urn:uuid:b3db40c6-1cda-4822-88bb-61f233ecb471>","cc-path":"CC-MAIN-2014-15/segments/1397609536300.49/warc/CC-MAIN-20140416005216-00238-ip-10-14... |
Intermediate Algebra
Posted by brenda on Tuesday, May 22, 2012 at 1:27pm.
Essay: show all work. Find the quotient:
Related Questions
intermediate algebra - Essay. Show all work. find the quotient: 49a^2-b^2...
Intermediate Algebra - Show all work. Find the quotient:49a^2-b^2/7a-b
algebra - Essay. Show all work. Find th... | {"url":"http://www.jiskha.com/display.cgi?id=1337707657","timestamp":"2014-04-20T12:19:04Z","content_type":null,"content_length":"8266","record_id":"<urn:uuid:ba49975e-477d-444c-8c22-823bbf060f20>","cc-path":"CC-MAIN-2014-15/segments/1398223205375.6/warc/CC-MAIN-20140423032005-00600-ip-10-147-4-33.ec2.internal.warc.gz"... |
Worst-case analysis of a generalized heapsort algorithm
- Comput. Math. Appl , 1998
"... In this paper we have observed and shown that ternary systems are more promising than the more traditional binary systems used in computers. In particular, ternary number system, heaps on
ternary trees, and quicksort with 3 partiti... | {"url":"http://citeseerx.ist.psu.edu/showciting?cid=1259756","timestamp":"2014-04-25T06:24:07Z","content_type":null,"content_length":"20278","record_id":"<urn:uuid:587a8e43-27dc-4d27-8b7f-07075820b47d>","cc-path":"CC-MAIN-2014-15/segments/1398223210034.18/warc/CC-MAIN-20140423032010-00276-ip-10-147-4-33.ec2.internal.wa... |
A circle packing conjecture
up vote 13 down vote favorite
Consider $n$ circles with variable radii $r_1,\ldots, r_n$ that pack inside a fixed circle of unit radius. In other words, all $n$ variable-radius circles are contained in the unit radius circle and
their interiors have empty intersections. The tangency graph of... | {"url":"http://mathoverflow.net/questions/38086/a-circle-packing-conjecture","timestamp":"2014-04-16T22:02:36Z","content_type":null,"content_length":"56825","record_id":"<urn:uuid:2ec1ef6e-a63d-442c-b320-cc11f3f30fb6>","cc-path":"CC-MAIN-2014-15/segments/1397609525991.2/warc/CC-MAIN-20140416005205-00242-ip-10-147-4-33.... |
ultiple : What
Problem Statement
2520 is the smallest number that can be divided by each of the numbers from 1 to 10 without any remainder. What is the smallest number that is evenly divisible by all of the numbers from 1 to 20?
This is essentially a requirement to compute the least common multiple for the values 1 th... | {"url":"http://codeblog.dhananjaynene.com/2010/01/least-common-multiple-what-is-the-smallest-number-that-is-evenly-divisible-by-all-of-the-numbers-from-1-to-20/","timestamp":"2014-04-19T09:24:27Z","content_type":null,"content_length":"18455","record_id":"<urn:uuid:c3b359e7-fb1e-490e-9b14-60d815f095cd>","cc-path":"CC-MA... |
Re: Extending REG-EXP to 2-Dimension.
rockwell@nova.umd.edu (Raul Deluth Miller)
Sat, 3 Dec 1994 18:38:20 GMT
From comp.compilers
| List of all articles for ... | {"url":"http://compilers.iecc.com/comparch/article/94-12-033","timestamp":"2014-04-18T10:42:18Z","content_type":null,"content_length":"7404","record_id":"<urn:uuid:9ab7d097-587f-41fe-9421-2607c5a51e4e>","cc-path":"CC-MAIN-2014-15/segments/1397609533308.11/warc/CC-MAIN-20140416005213-00184-ip-10-147-4-33.ec2.internal.wa... |
Mplus Discussion >> Complier Average Causal Efect (CACE) estimation
Jichuan Wang posted on Monday, January 21, 2002 - 12:58 pm
Two questions:
1). For only two treatment conditions (i.e., TX vs control): is it possible to have three levels of compliance (e.g., compliance, partial compliance, and non-compliance) so that ... | {"url":"http://www.statmodel.com/discussion/messages/13/158.html?1384308235","timestamp":"2014-04-19T02:24:46Z","content_type":null,"content_length":"137159","record_id":"<urn:uuid:b605d5ce-ee6f-4c19-89e1-de2a2cd72f92>","cc-path":"CC-MAIN-2014-15/segments/1397609535745.0/warc/CC-MAIN-20140416005215-00279-ip-10-147-4-33... |
Hidden Markov Models
This page is under construction.
The following presentation is adapted from [Rabiner & Juang, 1986] and [Charniak, 1993].
Notational conventions
T = length of the sequence of observations (training set)
N = number of states (we either know or guess this number)
M = number of possible observations (... | {"url":"http://cs.brown.edu/research/ai/dynamics/tutorial/Documents/HiddenMarkovModels.html","timestamp":"2014-04-16T16:06:42Z","content_type":null,"content_length":"14732","record_id":"<urn:uuid:64eb0f75-0fd5-433e-ab0b-3870ee2f3d20>","cc-path":"CC-MAIN-2014-15/segments/1397609524259.30/warc/CC-MAIN-20140416005204-0053... |
Fairview Village Algebra Tutor
Find a Fairview Village Algebra Tutor
...I use multi-sensory techniques for teaching reading, writing, and math, and also use student interests to begin work in an area of difficulty. In May 2010, I completed my Master's degree in
both special education and early childhood education. ... | {"url":"http://www.purplemath.com/fairview_village_algebra_tutors.php","timestamp":"2014-04-20T19:31:24Z","content_type":null,"content_length":"24339","record_id":"<urn:uuid:ca2a55eb-4df6-414c-9d8a-bf21eefdde7a>","cc-path":"CC-MAIN-2014-15/segments/1398223202548.14/warc/CC-MAIN-20140423032002-00655-ip-10-147-4-33.ec2.i... |
Solving IVP
August 27th 2012, 04:22 PM #1
Junior Member
Dec 2010
Solving IVP
The birth rate of B(t) of a population P(t) decreases exponentially with time, so that B(t)=B0e^at where a,B>0. Therefore the population dynamics are governed by the differential equation:
dP/dt=B(t)P where P(0)=P0
Solve the ab... | {"url":"http://mathhelpforum.com/differential-equations/202620-solving-ivp.html","timestamp":"2014-04-18T13:42:25Z","content_type":null,"content_length":"39517","record_id":"<urn:uuid:c5c4fd94-4bf6-450c-9a00-335b8f550ea6>","cc-path":"CC-MAIN-2014-15/segments/1397609533689.29/warc/CC-MAIN-20140416005213-00039-ip-10-147-... |
Holiday Hills, IL Geometry Tutor
Find a Holiday Hills, IL Geometry Tutor
...I am currently refurbishing my Spanish skills, but am confident in my ability to teach elementary and intermediate Spanish. I can also teach general translation techniques for any length of
text and travel crash-courses. While abroad, I par... | {"url":"http://www.purplemath.com/Holiday_Hills_IL_Geometry_tutors.php","timestamp":"2014-04-19T06:55:03Z","content_type":null,"content_length":"24239","record_id":"<urn:uuid:65ccd8ff-95b2-49d6-83bf-91f800ddb687>","cc-path":"CC-MAIN-2014-15/segments/1398223203841.5/warc/CC-MAIN-20140423032003-00396-ip-10-147-4-33.ec2.i... |
West Orange Science Tutor
Find a West Orange Science Tutor
...Recruiters at the busy Fort Dix were impressed with the record speed the test was taken with. With the training I have done since, I can easily and quickly upgrade your score by a significant
percentage, by engaging you in my specialized course, boosting... | {"url":"http://www.purplemath.com/west_orange_science_tutors.php","timestamp":"2014-04-21T10:52:40Z","content_type":null,"content_length":"24081","record_id":"<urn:uuid:e862dac5-52f8-4f56-932b-bb147af3bdda>","cc-path":"CC-MAIN-2014-15/segments/1397609539705.42/warc/CC-MAIN-20140416005219-00043-ip-10-147-4-33.ec2.intern... |
Issaquah Geometry Tutor
Find a Issaquah Geometry Tutor
...It is one of my favorites. If you need help getting it to do what you need, let me know. I can help!
46 Subjects: including geometry, English, reading, algebra 1
...I eventually majored in mathematics at Rice University, where I was an academic fellow, t... | {"url":"http://www.purplemath.com/issaquah_wa_geometry_tutors.php","timestamp":"2014-04-21T04:38:10Z","content_type":null,"content_length":"23740","record_id":"<urn:uuid:e78e2142-c497-4948-93d5-5a67173fd2be>","cc-path":"CC-MAIN-2014-15/segments/1397609539493.17/warc/CC-MAIN-20140416005219-00035-ip-10-147-4-33.ec2.inter... |
The mysteries of Venn diagrams
Above, a Venn diagram I made visually depicting every combination of Dwarf from the fairy tale. Not included: Snow White.
The other day I was tying to make some multi-set Venn diagrams with polar symmetry, which it turns out is harder than you'd think and has ties with prime number theo... | {"url":"http://boingboing.net/2010/01/04/the-mysteries-of-ven.html","timestamp":"2014-04-21T14:55:42Z","content_type":null,"content_length":"58656","record_id":"<urn:uuid:2e702c19-8d0e-4896-9c96-833a1a534d70>","cc-path":"CC-MAIN-2014-15/segments/1397609540626.47/warc/CC-MAIN-20140416005220-00148-ip-10-147-4-33.ec2.inte... |
RE: color definitions
Eric Gauthier (eric@h61-24.centre.edu)
Sat, 23 Sep 1995 15:11:45 -0400 (EDT)
the first thing to say is that the html hex colors
are listed in <RGB>. The trick to it is that the numbers
listed are hexadecimal. The red,green and blue components
are listed on a scale of intensity ranging from zero
to... | {"url":"http://1997.webhistory.org/www.lists/www-html.1995q3/0636.html","timestamp":"2014-04-17T21:30:27Z","content_type":null,"content_length":"2825","record_id":"<urn:uuid:c36482e7-631f-46f1-b99f-119e656e1e30>","cc-path":"CC-MAIN-2014-15/segments/1397609532128.44/warc/CC-MAIN-20140416005212-00481-ip-10-147-4-33.ec2.i... |
FW: RE [Haskell-cafe] Monad Description For Imperative Programmer
Dan Weston westondan at imageworks.com
Wed Aug 1 19:05:03 EDT 2007
I knew someone was going to catch me wandering into the deep end of the
Having read large parts of your blog, I would never presume to tell you
anything about Haskell or category theory, ... | {"url":"http://www.haskell.org/pipermail/haskell-cafe/2007-August/029857.html","timestamp":"2014-04-16T04:50:29Z","content_type":null,"content_length":"7827","record_id":"<urn:uuid:4eca66eb-6519-4617-b49f-2cdf0097de97>","cc-path":"CC-MAIN-2014-15/segments/1397609521512.15/warc/CC-MAIN-20140416005201-00130-ip-10-147-4-3... |
Stacks Project Blog
Non zero-divisors
Following the example of xkcd I somtimes try to figure out what is the correct terminology by searching different spellings and observing the number of hits. I did this for variants on the phrase in
the title but I didn’t find the results convincing. (Google thinks of “-” and ” ” b... | {"url":"http://math.columbia.edu/~dejong/wordpress/?p=2380&cpage=1","timestamp":"2014-04-20T20:54:57Z","content_type":null,"content_length":"22333","record_id":"<urn:uuid:29eed274-24ed-4c1c-89ab-75acb41873d2>","cc-path":"CC-MAIN-2014-15/segments/1398223206118.10/warc/CC-MAIN-20140423032006-00133-ip-10-147-4-33.ec2.inte... |
A question about primitive recursive functions
up vote 4 down vote favorite
I have a question about primitive recursive functions. Maybe it's trivial, if it is I will move it into math.stackexchange.
Is there a primitive recursive function $f$ which is a bijection of $N$ onto $N$ such that $f^{-1}$ is not primitive rec... | {"url":"http://mathoverflow.net/questions/127961/a-question-about-primitive-recursive-functions/127964","timestamp":"2014-04-18T21:54:25Z","content_type":null,"content_length":"56002","record_id":"<urn:uuid:3efcd943-b89b-46aa-86b2-a3e868ca01bd>","cc-path":"CC-MAIN-2014-15/segments/1397609535095.9/warc/CC-MAIN-201404160... |
This paper has two parts. Part one is mainly intended as a general introduction to the problem of sectioning vector bundles (in particular tangent bundles of smooth manifolds) by everywhere linearly
independent sections, giving a survey of some ideas, methods and results.\par Part two then records some recent progress ... | {"url":"http://www.dml.cz/handle/10338.dmlcz/701567","timestamp":"2014-04-21T07:03:48Z","content_type":null,"content_length":"11329","record_id":"<urn:uuid:6c7b5243-fe64-4355-90ad-981bf1bf5676>","cc-path":"CC-MAIN-2014-15/segments/1398223211700.16/warc/CC-MAIN-20140423032011-00482-ip-10-147-4-33.ec2.internal.warc.gz"} |
Learning Center SmartTutor - Logic
Disjunctive Addition
Disjunctive Addition is a rule of inference pertaining to the OR operator.
Disjunctive Addition adds any statement, true or false, to a given true statement.
Let's consider a statement "The Moon revolves around the Earth". We know that this statement is true -- it... | {"url":"http://lc.brooklyn.cuny.edu/smarttutor/logic/disadd.html","timestamp":"2014-04-19T11:58:10Z","content_type":null,"content_length":"9514","record_id":"<urn:uuid:0777921f-e84e-4eaf-b1f6-7cbb8b1e0a01>","cc-path":"CC-MAIN-2014-15/segments/1398223206118.10/warc/CC-MAIN-20140423032006-00387-ip-10-147-4-33.ec2.interna... |
[Numpy-discussion] Simple financial functions for NumPy
Gael Varoquaux gael.varoquaux@normalesup....
Fri Apr 4 10:09:55 CDT 2008
On Fri, Apr 04, 2008 at 09:11:37AM -0500, Travis E. Oliphant wrote:
> There are only two reasons that I can think of right now to keep them in
> NumPy instead of moving them to SciPy.
> 1) ... | {"url":"http://mail.scipy.org/pipermail/numpy-discussion/2008-April/032427.html","timestamp":"2014-04-17T18:49:26Z","content_type":null,"content_length":"3846","record_id":"<urn:uuid:5743108b-1935-472b-9963-4ff8b53f0b99>","cc-path":"CC-MAIN-2014-15/segments/1397609530895.48/warc/CC-MAIN-20140416005210-00383-ip-10-147-4... |
Geek Explains: Java, J2EE, Oracle, Puzzles, and Problem Solving!
Puzzle: A man has entered into a tunnel and has crossed only 1/4 of it while it hears a whistle from a train behind him. He turns and runs towards the train with the same speed and he could barely
get out of tunnel before the train (running with a constan... | {"url":"http://geekexplains.blogspot.com/2008/05/train-tunnel-and-man-how-faster-is.html","timestamp":"2014-04-17T21:23:18Z","content_type":null,"content_length":"88786","record_id":"<urn:uuid:09e0b62a-f67f-49e1-b6b0-d39a3dba4117>","cc-path":"CC-MAIN-2014-15/segments/1398223205375.6/warc/CC-MAIN-20140423032005-00637-ip... |
on with
title = {{Image Interpolation with Contour Stencils}},
author = {Getreuer, Pascal},
journal = {{Image Processing On Line}},
volume = {1},
year = {2011},
doi = {10.5201/ipol.2011.g_iics},
% if your bibliography style doesn't support doi fields:
note = {\url{http://dx.do... | {"url":"http://www.ipol.im/pub/art/2011/g_iics/","timestamp":"2014-04-20T20:55:49Z","content_type":null,"content_length":"48764","record_id":"<urn:uuid:15f82c00-bdc9-43c8-9151-ed707860227f>","cc-path":"CC-MAIN-2014-15/segments/1397609539230.18/warc/CC-MAIN-20140416005219-00437-ip-10-147-4-33.ec2.internal.warc.gz"} |
Stuggling with a rational exponent.
March 5th 2009, 08:26 PM #1
Junior Member
Jan 2009
Stuggling with a rational exponent.
I am trying to figure out what $(-3)^\frac{2}{3}$ is. I calculated it, possibly incorrectly as $\approx{2.08}$ by $\sqrt[3]{(-3)^2}$. I would calculate $-\sqrt[3]{3}, as \approx{-1.4422}$ t... | {"url":"http://mathhelpforum.com/pre-calculus/77180-stuggling-rational-exponent.html","timestamp":"2014-04-19T19:50:15Z","content_type":null,"content_length":"37593","record_id":"<urn:uuid:d8c3e437-bf82-45de-b90f-9fc7bda214fb>","cc-path":"CC-MAIN-2014-15/segments/1397609537376.43/warc/CC-MAIN-20140416005217-00448-ip-10... |
Author: H. D. Vinod, Fordham University, New York
Dates: Noted in the software itself
All The code on this page is provided gratis without any guarantees or warrantees.
Part A has GAUSS software code and Part B has some math typing tricks in MS-Word
Proprietary modifications of this code are not permitted.
Please make ... | {"url":"http://www.fordham.edu/economics/vinod/softw-hd.htm","timestamp":"2014-04-20T11:06:36Z","content_type":null,"content_length":"33198","record_id":"<urn:uuid:be14a701-e0b5-42a1-91ed-8ee42c1667f9>","cc-path":"CC-MAIN-2014-15/segments/1397609538423.10/warc/CC-MAIN-20140416005218-00333-ip-10-147-4-33.ec2.internal.wa... |