MetaFilter posts tagged with ellipse
http://www.metafilter.com/tags/ellipse
Posts tagged with 'ellipse' at MetaFilter.Sun, 26 Jul 2015 13:54:00 -0800Sun, 26 Jul 2015 13:54:00 -0800en-ushttp://blogs.law.harvard.edu/tech/rss60Loop - Pool on an elliptical table
http://www.metafilter.com/151559/Loop%2DPool%2Don%2Dan%2Delliptical%2Dtable
<a href="http://www.loop-the-game.com">Loop - Pool on an elliptical table.</a> <i>The ellipse has two significant points, called focuses, which have a remarkable geometrical property that is almost always explained using the example of an imaginary pool table.
"If a pool table is the shape of an ellipse, then a ball shot from one focus will always rebound to the other focus no matter in which direction the ball is shot."
That sounded interesting! Wouldn't it be fun, I thought, if I could build one of these imaginary tables?
<a href="http://www.theguardian.com/science/alexs-adventures-in-numberland/2015/jul/16/loop-new-cue-sport-pool-ellipse-elliptical">So I did</a>.</i> tag:metafilter.com,2015:site.151559Sun, 26 Jul 2015 13:54:00 -0800dngAn 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 -0800ocherdracoThe crying of x^2 + xy + y^2 = 49
http://www.metafilter.com/86137/The%2Dcrying%2Dof%2Dx2%2Dxy%2Dy2%2D49
<a href="http://people.math.jussieu.fr/~harris/Pynchon.pdf">"Pynchon, postmodern author, is commonly said to have a non-linear narrative style. No one seems to have taken seriously the possibility, to be explored in this essay, that his narrative style might in fact be <em>quadratic</em>."</a> Number theorist <a href="http://people.math.jussieu.fr/~harris/">Michael Harris</a> on Pynchon and <a href="http://mathdemos.gcsu.edu/mathdemos/family_of_functions/conic_gallery.html">conic sections</a>. tag:metafilter.com,2009:site.86137Sun, 25 Oct 2009 22:00:24 -0800escabeche