MetaFilter posts tagged with Math and maths
http://www.metafilter.com/tags/Math+maths
Posts tagged with 'Math' and 'maths' at MetaFilter.Sat, 12 Apr 2014 08:55:27 -0800Sat, 12 Apr 2014 08:55:27 -0800en-ushttp://blogs.law.harvard.edu/tech/rss60A SAT Attack on the Erdos Discrepancy Conjecture
http://www.metafilter.com/138247/A%2DSAT%2DAttack%2Don%2Dthe%2DErdos%2DDiscrepancy%2DConjecture
<a href="http://io9.com/computers-are-providing-solutions-to-math-problems-that-1525261141">Computers are providing solutions to math problems that we can't check</a> - "A computer has solved the longstanding <a href="http://arxiv.org/abs/1402.2184">Erdős discrepancy</a> problem! Trouble is, we have no idea what it's talking about — because the solution, which is <a href="http://www.newscientist.com/article/dn25068-wikipediasize-maths-proof-too-big-for-humans-to-check.html">as long as all of Wikipedia</a>'s pages combined, is far too <a href="http://mathbabe.org/2013/07/30/the-stacks-project-gets-ever-awesomer-with-new-viz/">voluminous</a> for us <a href="http://oliviacaramello.com/Unification/Unification.htm">puny humans</a> to confirm." (<a href="http://marginalrevolution.com/marginalrevolution/2014/04/are-computer-coming-up-with-answers-we-cannot-understand.html">via</a>; <a href="http://www.metafilter.com/126041/Computerized-Math-Formal-Proofs-andamp-Alternative-Logic">previously</a> ;) tag:metafilter.com,2014:site.138247Sat, 12 Apr 2014 08:55:27 -0800kliulessthere is no soundtrack
http://www.metafilter.com/137347/there%2Dis%2Dno%2Dsoundtrack
<a href="https://www.simonsfoundation.org/quanta/20140224-a-fluid-new-path-in-grand-math-challenge/">Finite time blowup for an averaged three-dimensional Navier-Stokes equation</a> - "[<a href="http://terrytao.wordpress.com/">Terence Tao</a>] has shown that in an alternative abstract universe closely related to the one described by the <a href="http://en.wikipedia.org/wiki/Navier%E2%80%93Stokes_equations">Navier-Stokes</a> equations, it is possible for a body of fluid to form a sort of computer, which can build a self-replicating fluid robot that, <a href="http://www.drseussart.com/details/illustration/littlecats.html">like the Cat in the Hat</a>, keeps transferring its energy to smaller and smaller copies of itself until the fluid '<a href="http://terrytao.wordpress.com/2014/02/04/finite-time-blowup-for-an-averaged-three-dimensional-navier-stokes-equation/">blows up</a>.' " [<a href="http://terrytao.wordpress.com/2014/02/25/conserved-quantities-for-the-euler-equations/">1</a>,<a href="http://terrytao.wordpress.com/2014/03/02/noethers-theorem-and-the-conservation-laws-for-the-euler-equations/">2</a>,<a href="http://terrytao.wordpress.com/2014/03/06/conserved-quantities-for-the-surface-quasi-geostrophic-equation/">3</a>] (<a href="http://www.metafilter.com/55295/Another-Clay-Institute-Millenium-Prize-Problem-Solved">previously</a>) tag:metafilter.com,2014:site.137347Sun, 09 Mar 2014 13:49:39 -0800kliulessJohn Baez on the maths of connecting everyone (and everything) on earth
http://www.metafilter.com/137105/John%2DBaez%2Don%2Dthe%2Dmaths%2Dof%2Dconnecting%2Deveryone%2Dand%2Deverything%2Don%2Dearth
<a href="http://johncarlosbaez.wordpress.com/2014/02/22/network-theory-overview/">Network Theory Overview</a> - "<a href="http://johncarlosbaez.wordpress.com/2014/02/07/network-theory-talks-at-oxford/">The idea</a>: nature and the world of human technology are <a href="http://johncarlosbaez.wordpress.com/2013/04/23/network-theory-part-29/">full of networks</a>! People like to draw diagrams of networks. Mathematical physicists know that in principle these diagrams can be understood using <a href="http://math.ucr.edu/home/baez/irvine/">category theory</a>. But why should <a href="http://www.perimeterinstitute.ca/videos/energy-and-environment-what-physicists-can-do">physicists have all the fun</a>? This is the century of <i><a href="https://plus.google.com/117663015413546257905/posts/e6stQjMvm3y">understanding living systems and adapting to life on a finite planet</a></i>. Math isn't the main thing we need, but it's got to be <a href="https://plus.google.com/117663015413546257905/posts/5gt7pfibYMg">part of the solution</a>... <a href="http://johncarlosbaez.wordpress.com/2014/03/02/network-theory-i/">so one thing we should do</a> is develop a unified and powerful <a href="http://math.ucr.edu/home/baez/networks/">theory of networks</a>." (<a href="https://plus.google.com/117663015413546257905/posts/SmWyn8HcDyW">via</a> ;) tag:metafilter.com,2014:site.137105Sun, 02 Mar 2014 09:06:38 -0800kliulessWondering What to Get with That Gift Card?
http://www.metafilter.com/135164/Wondering%2DWhat%2Dto%2DGet%2Dwith%2DThat%2DGift%2DCard
It's a bit late for the holiday, but math(s) comedian Helen Arney <a href="http://www.bbc.co.uk/programmes/p01ns0wj">sings about her Christmas wish</a> -- the largest known Mersenne Prime, <a href="http://en.wikipedia.org/wiki/Mersenne_prime">Mersenne 48</a>. The song appeared on a recent edition of the BBC4 radio show/podcast <a href="http://www.bbc.co.uk/programmes/b006qshd">More or Less</a> which deals with numbers and especially statistics. Arney performs as part of <a href="http://festivalofthespokennerd.com/">The Festival of the Spoken Nerd</a> in the UK.
Bonus Helen Arney -- <a href="http://www.youtube.com/watch?v=5JOAoiX1LHA&feature=c4-overview-vl&list=PLUQzg8K3BcJLmneP2TwqoEJvqr2_NvFIX">"The Google Song"</a> from Numberphile [<a href="http://www.metafilter.com/123329/Numberphile-videos-about-numbers-and-stuff">previously</a>] tag:metafilter.com,2013:site.135164Sat, 28 Dec 2013 07:20:05 -0800GenjiandProustbinding the andat
http://www.metafilter.com/134338/binding%2Dthe%2Dandat
<a href="http://www.wired.com/wiredscience/2013/11/prime/all/">Closing in on the twin prime conjecture</a> (<a href="https://www.simonsfoundation.org/quanta/20131119-together-and-alone-closing-the-prime-gap/">Quanta</a>) - "Just months after <a href="http://www.metafilter.com/128049/Quite-a-day-for-analytic-number-theory">Zhang</a> announced his result, <a href="http://arxiv.org/abs/1311.4600">Maynard</a> has presented an independent proof that pushes the gap down to 600. A <a href="http://terrytao.wordpress.com/tag/polymath8/">new Polymath project</a> is in the planning stages, to try to combine the collaboration's techniques with Maynard's approach to push this bound even lower." <a href="https://plus.google.com/u/0/117663015413546257905/posts/LxR23RdyvuF">also btw</a> :P (<a href="https://plus.google.com/u/0/117663015413546257905/posts/jd5K4jBKRYP">for fun</a>!)
-<a href="https://plus.google.com/u/0/117663015413546257905/posts/Z4cUWGQp8Ar">Schröder–Hipparchus numbers</a> (<a href="http://golem.ph.utexas.edu/category/2013/04/permutations_polynomials_and_p.html">The Hipparchus Operad</a>)
-<a href="https://plus.google.com/u/0/117663015413546257905/posts/WoXqXCzkc9S">Quasi</a>-<a href="http://golem.ph.utexas.edu/category/2013/06/quasicrystals_and_the_riemann.html">crystals</a> (<a href="https://plus.google.com/u/0/117663015413546257905/posts/j4Xxg44n1t6">quantum physics and number theory</a>)
-<a href="https://www.simonsfoundation.org/quanta/20131126-to-settle-infinity-question-a-new-law-of-logic/">To Settle Infinity Question, a New Law of Mathematics</a>
oh and <a href="https://www.simonsfoundation.org/quanta/20131107-physicists-eye-quantum-gravity-interface/">perhaps</a> more practically...
-<a href="http://www.thephysicsmill.com/2013/10/13/causal-dynamical-triangulations/">Quantum Geometry: Causal Dynamical Triangulations</a> (<a href="https://plus.google.com/u/0/117663015413546257905/posts/ATg9EwD5CJy">via</a>)
-<a href="https://plus.google.com/u/0/117663015413546257905/posts/9HeN1sSQztA">Quantropy</a>
-<a href="https://plus.google.com/u/0/117663015413546257905/posts/51Gd5adQZNM">Petri nets</a> (<a href="http://johncarlosbaez.wordpress.com/2013/04/19/petri-net-programming-part-3/">programming</a> <a href="http://www.metafilter.com/134300/ASCII-fluid-simulator">water</a>)
-<a href="http://johncarlosbaez.wordpress.com/2013/04/23/network-theory-part-29/">Network theory</a>
-<a href="https://plus.google.com/u/0/117663015413546257905/posts/SrQe3Bsd9kp">The network of mathematics</a>
-<a href="http://math.ucr.edu/home/baez/irvine/">The Foundations of Applied Mathematics</a> (<a href="https://plus.google.com/u/0/117663015413546257905/posts/LX52bzbuWgH">topos theory</a>)
-<a href="http://www.wired.com/wiredscience/2013/10/topology-data-sets/all/">Topological Data Analysis</a> tag:metafilter.com,2013:site.134338Sun, 01 Dec 2013 16:19:50 -0800kliulessTwelve Tones
http://www.metafilter.com/129471/Twelve%2DTones
<i>"It's just one of those days where you wake up thinking that if you jazzed up Stravinsky's Owl And The Pussycat it'd be <a href="http://www.youtube.com/watch?v=4niz8TfY794">awesome</a>..."</i> [SLYT] <a href="http://www.youtube.com/watch?v=4niz8TfY794">Twelve Tones</a> is a new video essay by mathemusician <a href="https://www.khanacademy.org/math/recreational-math/vi-hart">Vi Hart</a>, using Schoenberg's <a href="https://en.wikipedia.org/wiki/Twelve-tone_technique">twelve tone technique</a> as the jumping off point for a meditation on the nature of art, meaning, and creativity, the tension between cliche and stuff people recognise, and pattern recognition.
Previous Vi Hart: <a href="http://www.metafilter.com/122117/Potatoes-and-Math">1</a>, <a href="http://www.metafilter.com/119511/I-Heart-Cardioids">2</a>, <a href="http://www.metafilter.com/112181/Pineapple-under-the-sea-Really">3</a>, <a href="http://www.metafilter.com/98150/Explorations-of-a-Recreational-Mathematician">4</a>. tag:metafilter.com,2013:site.129471Thu, 27 Jun 2013 14:54:10 -0800mottyIs there any point to the 12 times table?
http://www.metafilter.com/129457/Is%2Dthere%2Dany%2Dpoint%2Dto%2Dthe%2D12%2Dtimes%2Dtable
<a href="http://blog.wolfram.com/2013/06/26/is-there-any-point-to-the-12-time">Is there any point to the 12 times table?</a> Bonus: <a href="http://www.youtube.com/watch?v=vzXcI49jdV0">Times table song</a> tag:metafilter.com,2013:site.129457Thu, 27 Jun 2013 07:18:38 -0800Cat Pie HurtsProof and Community Standards
http://www.metafilter.com/127954/Proof%2Dand%2DCommunity%2DStandards
In August of last year, mathematician Shinichi Mochizuki reported that he had solved one of the great puzzles of number theory: the ABC conjecture (<a href="http://www.metafilter.com/119847/Mathematics-world-abuzz-with-a-proof-of-the-ABC-Conjecture">previously on Metafilter</a>). Almost a year later, no one else knows whether he has succeeded. <a href="http://projectwordsworth.com/the-paradox-of-the-proof/">No one can understand his proof.</a> tag:metafilter.com,2013:site.127954Fri, 10 May 2013 14:51:46 -0800painqualeComputerized Math, Formal Proofs and Alternative Logic
http://www.metafilter.com/126041/Computerized%2DMath%2DFormal%2DProofs%2Dandamp%2DAlternative%2DLogic
<a href="http://www.wired.com/wiredscience/2013/03/computers-and-math/all/">Using computer systems for doing mathematical proofs</a> - "With the proliferation of <a href="http://en.wikipedia.org/wiki/Computer-assisted_proof">computer-assisted proofs</a> that are all but impossible to check by hand, Hales thinks computers must become the judge." <blockquote>Three years ago, Vladimir Voevodsky, one of the organizers of a new program on the foundations of mathematics at the Institute for Advanced Study in Princeton, N.J., discovered that a formal logic system that was developed by computer scientists, called "<a href="http://en.wikipedia.org/wiki/Type_theory">type theory</a>" could be used to re-create the entire mathematical universe from scratch. Type theory is consistent with the mathematical axioms, but couched in the language of computers. Voevodsky believes this alternative way to formalize mathematics, which he has renamed the <a href="http://video.ias.edu/univalent/voevodsky">univalent foundations of mathematics</a>, will streamline the process of formal theorem proving. Voevodsky and his team are adapting a <a href="https://plus.google.com/u/0/117663015413546257905/posts/4BZRibN6iKQ">program named Coq</a>, which was designed to formally verify computer algorithms, for use in abstract mathematics.</blockquote>
also btw, speaking of mathematical revolutions, from a historical perspective, check out <a href="http://www.scientificamerican.com/article.cfm?id=the-man-of-numbers-fibona&print=true">The Man of Numbers: Fibonacci's Arithmetic Revolution</a> - "Before the 13th century Europeans used Roman numerals to do arithmetic. Leonardo of Pisa, better known today as Fibonacci, is largely responsible for the adoption of the Hindu–Arabic numeral system in Europe, which revolutionized not only mathematics but commerce and trade as well. How did the system spread from the Arab world to Europe, and what would our lives be without it?" tag:metafilter.com,2013:site.126041Sat, 16 Mar 2013 15:33:01 -0800kliulessthe power and beauty of mathematics
http://www.metafilter.com/124535/the%2Dpower%2Dand%2Dbeauty%2Dof%2Dmathematics
<a href="http://blogs.scientificamerican.com/the-curious-wavefunction/2013/01/22/an-eternity-of-infinities-the-power-and-beauty-of-mathematics/">An eternity of infinities</a> (<a href="http://economistsview.typepad.com/economistsview/2013/01/links-for-01-23-2013.html">via</a>) "The comparison of infinities is simple to understand and is a fantastic device for introducing children to the wonders of mathematics. It drives home the essential weirdness of the mathematical universe and raises penetrating questions not only about the nature of this universe but about the nature of the human mind that can comprehend it. One of the biggest questions concerns the nature of reality itself. Physics has also revealed counter-intuitive truths about the universe like the curvature of space-time, the duality of waves and particles and the spooky phenomenon of entanglement, but these truths undoubtedly have a real existence as observed through exhaustive experimentation. But what do the bizarre truths revealed by mathematics actually mean? Unlike the truths of physics they can't exactly be touched and seen. Can some of these such as the perceived differences between two kinds of infinities simply be a function of human perception, or do these truths point to an objective reality 'out there'? If they are only a function of human perception, what is it exactly in the structure of the brain that makes such wondrous creations possible? In the twenty-first century when neuroscience promises to reveal more of the brain than was ever possible, the investigation of mathematical understanding could prove to be profoundly significant." tag:metafilter.com,2013:site.124535Sat, 02 Feb 2013 09:14:26 -0800kliulessAn example of "order out of chaos"
http://www.metafilter.com/122470/An%2Dexample%2Dof%2Dorder%2Dout%2Dof%2Dchaos
<a href="http://blog.matthen.com/post/35993520930/draw-some-random-points-on-a-piece-of-paper-and">"Draw some random points</a> on a piece of paper and join them up to make a random polygon. Find all the midpoints and connecting them up to give a new shape, and repeat. The resulting shape will get smaller and smaller, and will tend towards an ellipse!" [<a href="http://pastebin.com/2JJ96L14" title="code to make this in Mathematica">code to make this in Mathematica</a>] [<a href="http://www.jasondavies.com/random-polygon-ellipse/">a version which allows you to watch the process step by step, with 10 vertices or 100</a>] tag:metafilter.com,2012:site.122470Mon, 03 Dec 2012 14:09:36 -0800ocherdracodirect realism
http://www.metafilter.com/122400/direct%2Drealism
<a href="http://dannyreviews.com/h/Nature_Computation.html">The Nature of Computation</a> - <a href="http://masi.cscs.lsa.umich.edu/~crshalizi/reviews/nature-of-computation.html">Intellects Vast and Warm and Sympathetic</a>: "I hand you a network or graph, and ask whether there is a path through the network that crosses each edge exactly once, returning to its starting point. (That is, I ask whether there is a 'Eulerian' cycle.) Then I hand you another network, and ask whether there is a path which visits each node exactly once. (That is, I ask whether there is a 'Hamiltonian' cycle.) How hard is it to answer me?" (<a href="http://masi.cscs.lsa.umich.edu/~crshalizi/weblog/algae-2011-10.html">via</a>) <blockquote>This is, simply put, the best-written book on the theory of computation I have ever read; one of the best-written mathematical books I have ever read, period... from beginning to end, and all the 900+ pages in between, this was lucid, insightful, just rigorous enough, alive to how technical problems relate to larger issues, and above all, passionate and human.</blockquote>also btw...<ul><li><a href="http://infoproc.blogspot.com/2011/10/on-origin-of-probability-in-quantum.html">On the origin of probability in quantum mechanics</a> - "Because the wave function evolves entirely deterministically in <a href="http://infoproc.blogspot.com/2012/11/schwinger-on-quantum-foundations.html">many worlds</a>, all probabilities are necessarily subjective and the interpretation does not require <a href="http://www.metafilter.com/contribute/search.mefi?q=chaitin&tab=comments&site=mefi&sort=date">true</a> <a href="http://www.metafilter.com/122256/The-Royal-Society-Winton-Prize-2012">randomness</a>, thereby preserving Einstein's requirement that outcomes have causes."
<li><a href="http://johncarlosbaez.wordpress.com/2012/10/08/the-mathematical-origin-of-irreversibility/">The Mathematical Origin of Irreversibility</a> - "The key to this rather profound connection resides in a universal property of Markov processes discovered recently in the context of non-equilibrium statistical mechanics, and known as the '<a href="https://plus.google.com/u/0/117663015413546257905/posts/cLjAKybxWR8">fluctuation theorem</a>'. Typically stated in terms of '<a href="http://masi.cscs.lsa.umich.edu/~crshalizi/notebooks/prigogine.html">dissipated work</a>' or '<a href="http://masi.cscs.lsa.umich.edu/~crshalizi/notebooks/tsallis.html">entropy production</a>', this result can be seen as an extension of the Second Law of Thermodynamics to <i>small</i> systems, where thermal fluctuations cannot be neglected. But <i>it is actually much more than this</i>: it is the mathematical underpinning of irreversibility itself, be it thermodynamical, evolutionary, or else. To make this point clear, let me start by giving a general formulation of the fluctuation theorem that makes no reference to physics concepts such as 'heat' or 'work' "
<li><a href="https://plus.google.com/u/0/117663015413546257905/posts/jYw1fnVTFbY">A nice easy explanation</a> of the <a href="http://www.metafilter.com/119847/Mathematics-world-abuzz-with-a-proof-of-the-ABC-Conjecture">abc</a> <a href="https://plus.google.com/u/0/117663015413546257905/posts/Npu7xDniXMS">conjecture</a> [also btw <a href="http://www.metafilter.com/121668/Grahams-Number">1</a>,<a href="https://plus.google.com/u/0/117663015413546257905/posts/VLkhD7NBAb3">2</a>,<a href="https://plus.google.com/u/0/117663015413546257905/posts/6pbLR5Yyf8h">3</a>,<a href="https://plus.google.com/u/0/117663015413546257905/posts/cqMha2Lz5gr">4</a>,<a href="https://plus.google.com/u/0/117663015413546257905/posts/cLjAKybxWR8">5</a>,<a href="https://plus.google.com/u/0/117663015413546257905/posts/4BZRibN6iKQ">6</a>,<a href="https://plus.google.com/u/0/117663015413546257905/posts/DdA4HkKfMiL">7</a>,<a href="http://www.metafilter.com/107661/Counting">8</a>]
<li><a href="http://en.wikipedia.org/wiki/Hilary_Putnam">An argument for the reality of mathematical entities</a> [<a href="http://en.wikipedia.org/wiki/Max_Tegmark">1</a>,<a href="http://masi.cscs.lsa.umich.edu/~crshalizi/reviews/ballard-natural/">2</a>,<a href="http://andrewsullivan.thedailybeast.com/2012/08/ask-jim-holt-anything-your-favorite-philosopher-and-why.html">3</a>]
<li><a href="http://blogs.discovermagazine.com/cosmicvariance/2012/10/22/from-particles-to-people-the-laws-of-nature-and-the-meaning-of-life/">From Particles to People: The Laws of Nature and the Meaning of Life</a> [<a href="http://blogs.discovermagazine.com/cosmicvariance/2012/04/24/the-particle-at-the-end-of-the-universe/">1</a>,<a href="http://blogs.discovermagazine.com/cosmicvariance/2012/11/13/a-book-full-of-particles/">2</a>,<a href="http://blogs.discovermagazine.com/cosmicvariance/2012/10/11/moving-naturalism-forward/">3</a>,<a href="http://blogs.discovermagazine.com/cosmicvariance/2012/10/18/feynman-on-initial-conditions-evolving-laws-and-what-we-consider-physics/">4</a>,<a href="http://science.slashdot.org/story/12/08/01/2127225/entangled-particles-break-classical-law-of-thermodynamics-say-physicists">5</a>]</li></li></li></li></li></ul><a href="http://www.hpcwire.com/hpcwire/2012-10-10/could_the_universe_reveal_itself_as_a_computer_simulation_.html">Could the Universe Reveal Itself as a Computer Simulation?</a> (<a href="http://www.metafilter.com/119883/WHOA-DUDE-ARE-WE-INSIDE-A-COMPUTER-RIGHT-NOW">previously</a>) tag:metafilter.com,2012:site.122400Sat, 01 Dec 2012 00:12:10 -0800kliulessnoncommutative balls in boxes
http://www.metafilter.com/118119/noncommutative%2Dballs%2Din%2Dboxes
<a href="http://golem.ph.utexas.edu/category/2012/07/morton_and_vicary_on_the_categ.html">Morton and Vicary on the Categorified Heisenberg Algebra</a> - "In quantum mechanics, position times momentum does not equal momentum times position! This sounds weird, but it's connected to a very simple fact. Suppose you have a box with some balls in it, and you have the magical ability to create and annihilate balls. Then there's one more way to create a ball and then annihilate one, than to annihilate one and then create one. Huh? Yes: if there are, say, 3 balls in the box to start with, there are 4 balls you can choose to annihilate after you've created one but only 3 before you create one..." <blockquote>This insight, that funny facts about quantum mechanics are related to simple facts about balls in boxes, allows us to 'categorify' a chunk of quantum mechanics—including the Heisenberg algebra, which is the algebra generated by the position and momentum operators. Now is not the time to explain what that means. The important thing is that Mikhail Khovanov figured out a seemingly quite different way to categorify the same chunk of quantum mechanics, so there was a big puzzle about how his approach relates to the one I just described. Jeffrey Morton and Jamie Vicary have solved that puzzle.
The big spinoff is this. Khovanov's approach showed that in categorified quantum mechanics, a bunch of new equations are true! These equations are 'higher analogues' of Heisenberg's famous formula
<center><i>pq − qp = −i</i></center>
So, these new equations should be important! ... Now Jeffrey and Jamie have shown how to get these equations just by thinking about balls in boxes... The important thing is this: those equations are not something we get to choose, or make up. They are what they are, and they're just sitting there waiting for us to discover them.</blockquote>btw <a href="https://plus.google.com/u/0/117663015413546257905/posts/7ovL7oxoV5Z">John Baez sez</a>: "<a href="http://arxiv.org/abs/1207.2054">Don't even look at it</a> unless you're an expert in mathematical physics, but it's important - and I think someday it could change our understanding of quantum mechanics." :P (I didn't; I know next to nothing about this stuff, but I found it interesting so I thought I'd share ;) tag:metafilter.com,2012:site.118119Sat, 21 Jul 2012 09:42:04 -0800kliulessThe Art of π, φ and e
http://www.metafilter.com/117319/The%2DArt%2Dof%2Dpi%2Dphi%2Dand%2De
<a href="http://mkweb.bcgsc.ca/pi/art/">The Art of π, φ and <em>e</em></a> The creator of <a href="http://circos.ca/">Circos</a> and <a href="http://www.metafilter.com/110081/Buzzing-about-network-graphs">hive plots</a> plays around with visualizing a few irrational numbers and their odd characteristics. tag:metafilter.com,2012:site.117319Tue, 26 Jun 2012 14:27:04 -0800Blazecock PileonBig (and small) Numbers
http://www.metafilter.com/115929/Big%2Dand%2Dsmall%2DNumbers
<a href="http://fatfonts.org/">FatFonts</a> creates <a href="http://www.newscientist.com/article/mg21428635.500-font-for-digits-lets-numbers-punch-their-weight.html">numerical</a> <a href="http://calculatedimages.blogspot.ca/2012/05/fatfonts.html">fonts</a> where the amount of ink/pixels for each number is in direct proportion to its <a href="http://infosthetics.com/archives/2012/05/fatfonts_new_font_links_value_of_a_number_to_amount_of_pixels.html">value</a>. tag:metafilter.com,2012:site.115929Mon, 14 May 2012 11:09:42 -0800fearfulsymmetryCool Math Conundrums
http://www.metafilter.com/115925/Cool%2DMath%2DConundrums
<a href="http://math.stackexchange.com/questions/96331/in-russian-roulette-is-it-best-to-go-first">In Russian roulette, is it best to go first?</a> | <a href="http://math.stackexchange.com/questions/80246/the-mathematics-of-tetris">The Mathematics of Tetris</a> | <a href="http://math.stackexchange.com/questions/60766/what-is-the-result-of-infinity-minus-infinity">What is the result of infinity minus infinity?</a> <a href="http://math.stackexchange.com/questions/22513/learning-mathematics-as-if-an-absolute-beginner">Learning mathematics as if an absolute beginner?</a>
<a href="http://math.stackexchange.com/questions/2755/why-can-you-turn-clothing-right-side-out">Why can you turn clothing right-side-out?</a>
<a href="http://math.stackexchange.com/questions/139699/what-are-some-examples-of-a-mathematical-result-being-counterintuitive">What are some examples of a mathematical result being counterintuitive?</a>
<a href="http://math.stackexchange.com/questions/11669/mathematical-difference-between-white-and-black-notes-in-a-piano">Mathematical difference between white and black notes in a piano</a>
<a href="http://math.stackexchange.com/questions/250/a-challenge-by-r-p-feynman-give-counter-intuitive-theorems-that-can-be-transl">A challenge by R. P. Feynman: give counter-intuitive theorems that can be translated into everyday language</a>
<a href="http://math.stackexchange.com/questions/139503/in-the-history-of-mathematics-has-there-ever-been-a-mistake">In the history of mathematics, has there ever been a mistake?</a>
<a href="http://math.stackexchange.com/questions/31785/how-many-sides-does-a-circle-have">How many sides does a circle have?</a>
<a href="http://math.stackexchange.com/questions/129013/how-do-you-explain-the-concept-of-logarithm-to-a-five-year-old">How do you explain the concept of logarithm to a five year old?</a>
<a href="http://math.stackexchange.com/questions/49034/is-infinity-an-odd-or-even-number">Is infinity an odd or even number?</a> tag:metafilter.com,2012:site.115925Mon, 14 May 2012 09:27:09 -0800Foci for AnalysisSure it's irrational! Just look!
http://www.metafilter.com/115787/Sure%2Dits%2Dirrational%2DJust%2Dlook
Geometrically the irrationality of the square root of 2 means that there is no integer-by-integer square whose area is twice the area of another integer-by-integer square. <a href="http://divisbyzero.com/2009/10/06/tennenbaums-proof-of-the-irrationality-of-the-square-root-of-2/">A visual proof that the square root of 2 is irrational</a> (not found in <a href="http://www.metafilter.com/105649/Then-you-wouldnt-have-to-say-QED-cause-Id-already-know">previous visual proof post</a>.) tag:metafilter.com,2012:site.115787Wed, 09 May 2012 18:29:57 -0800Obscure ReferenceBeaded Beads
http://www.metafilter.com/105682/Beaded%2DBeads
<a href="http://www.beadinfinitum.com/GwenGallery/JMM2010Exhibit.html">Beaded Polyhedra</a> ❂ <a href="http://www.beadinfinitum.com/GwenGallery/index.html">More beadwork</a> (mathematical and otherwise) by Gwen Fisher ❂ <a href="http://www.beadinfinitum.com/Galleries.html">Still more beadwork galleries</a> at <a href="http://www.beadinfinitum.com">beAdinfinitum</a> ❂ <a href="http://myweb.lmu.edu/bmellor/beadedbeads.pdf">Three-dimensional finite point groups and the symmetry of beaded beads</a> [pdf - some algebra, but lots of illustrations] tag:metafilter.com,2011:site.105682Tue, 19 Jul 2011 10:39:32 -0800WolfdogThen you wouldn't have to say "QED", 'cause I'd already know
http://www.metafilter.com/105649/Then%2Dyou%2Dwouldnt%2Dhave%2Dto%2Dsay%2DQED%2Dcause%2DId%2Dalready%2Dknow
<a href="http://mathoverflow.net/questions/8846/proofs-without-words" title="Many of which turn out, after all, to benefit from some words.">A thread full of proofs without words</a> at MathOverflow and <a href="http://books.google.com/books?id=cyyhZr-SffcC&dq=proofs+without+words&printsec=frontcover&source=bn&hl=en&sa=X&oi=book_result&resnum=5&ct=result#v=onepage&q&f=false" title="Many of which are well known... to those who know.">quite a lot more of them</a> courtesy of Google Books. tag:metafilter.com,2011:site.105649Mon, 18 Jul 2011 09:59:48 -0800WolfdogFinite formula found for partition numbers
http://www.metafilter.com/99788/Finite%2Dformula%2Dfound%2Dfor%2Dpartition%2Dnumbers
<a href="http://esciencecommons.blogspot.com/2011/01/new-theories-reveal-nature-of-numbers.html">New math theories reveal the nature of numbers</a> [<a href="http://www.aimath.org/news/partition/folsom-kent-ono.pdf">1</a>,<a href="http://www.aimath.org/news/partition/brunier-ono.pdf">2</a>] - "We prove that <a href="http://blogs.plos.org/badphysics/2011/01/20/ono/">partition numbers</a> are 'fractal' for every prime. <a href="http://www.science20.com/news_articles/partition_numbers_behave_fractals_says_mathematician-75556">These numbers</a>, in a way we make precise, are <a href="http://hiddencause.wordpress.com/2011/01/20/pn-is-a-fractal-when-n-is-prime/">self-similar</a> in a shocking way. Our 'zooming' procedure resolves several open conjectures, and it will change how mathematicians study partitions." (<a href="http://science.slashdot.org/story/11/01/21/2047229/Eulers-Partition-Function-Theory-Finished">/.</a>|<a href="http://economistsview.typepad.com/economistsview/2011/01/links-for-2011-01-20.html">via</a>) BONUS
<li><a href="http://arstechnica.com/science/news/2011/01/fractals-plus-quantum-mechanics-equals-chaos.ars">Fractals plus quantum mechanics equals chaos</a> - "investigating the properties of light when it is confined to a fractal object"
<li><a href="http://science.slashdot.org/story/11/01/20/1546206/Polynomial-Time-Code-For-3-SAT-Released-PNP">Polynomial Time Code For 3-SAT Released</a> - "This is not a P=NP paper."</li></li> tag:metafilter.com,2011:site.99788Sat, 22 Jan 2011 10:40:18 -0800kliulessOr like a computer. Or like an Egyptian computer.
http://www.metafilter.com/98339/Or%2Dlike%2Da%2Dcomputer%2DOr%2Dlike%2Dan%2DEgyptian%2Dcomputer
<a href="http://www.youtube.com/watch?v=Ih1ZWE3pe9o&feature=mfu_in_order&list=UL">Multiply like an Egyptian. (SLYT)</a> tag:metafilter.com,2010:site.98339Thu, 09 Dec 2010 06:37:18 -0800overeducated_alligatorThe plot isn't great, but the plots are pretty good.
http://www.metafilter.com/98098/The%2Dplot%2Disnt%2Dgreat%2Dbut%2Dthe%2Dplots%2Dare%2Dpretty%2Dgood
<a href="http://www.youtube.com/watch?v=LCWglXljevY">The OEIS Movie</a> is simply a slideshow of one thousand plots from the <a href="http://oeis.org/">Online Encyclopedia of Integer Sequences</a>, at two plots per second with sequence-generated music. You can download the movie <a href="http://www.sspectra.com/math/MovieFrames/">in Quicktime format here</a>. tag:metafilter.com,2010:site.98098Thu, 02 Dec 2010 06:16:37 -0800WolfdogA Brief History of Mathematics
http://www.metafilter.com/98090/A%2DBrief%2DHistory%2Dof%2DMathematics
<a href="http://www.bbc.co.uk/podcasts/series/maths">A Brief History of Mathematics</a> is a BBC series of ten fifteen-minute podcasts by Professor Marcus du Sautoy about the history of mathematics from Newton and Leibniz to Nicolas Bourbaki, the pseudonym of a group of French 20th Century mathematicians. Among those covered by Professor du Sautoy are Euler, Fourier and Poincaré. The podcasts also include short interviews with people such as Brian Eno and Roger Penrose. tag:metafilter.com,2010:site.98090Wed, 01 Dec 2010 21:17:18 -0800Kattullusfrom complexity, universality
http://www.metafilter.com/96954/from%2Dcomplexity%2Duniversality
<a href="http://terrytao.wordpress.com/2010/09/14/a-second-draft-of-a-non-technical-article-on-universality/">A brief tour of the mysteriously universal laws of mathematics and nature.</a> BONUS
- <a href="http://www.americanscientist.org/issues/id.9346,y.2010,no.3,content.true,page.1,css.print/issue.aspx">The Bootstrap</a> [<a href="http://cscs.umich.edu/~crshalizi/notebooks/bootstrap.html">1</a>,<a href="http://bactra.org/weblog/652.html">2</a>]
- <a href="http://delong.typepad.com/sdj/2010/10/the-physics-of-wet-dogs.html">The Physics of Wet Dogs</a> tag:metafilter.com,2010:site.96954Sun, 24 Oct 2010 07:11:27 -0800kliulessHow do you calculate Pi? Build a supercomputer.
http://www.metafilter.com/95578/How%2Ddo%2Dyou%2Dcalculate%2DPi%2DBuild%2Da%2Dsupercomputer
<a href="http://www.newyorker.com/archive/1992/03/02/1992_03_02_036_TNY_CARDS_000362534?printable=true">How do you calculate Pi? Build a supercomputer.</a> <em>The Mountains of Pi</em>, a New Yorker profile of the mathematician (sic) the Chudnovsky brothers. <small>Warning: the article is from 1992, and internet is missing its definite article.</small> (<a href="http://www.metafilter.com/41612/Capturing-the-Unicorn">Previously</a>) tag:metafilter.com,2010:site.95578Thu, 09 Sep 2010 13:28:57 -0800OmieWise