http://netvouz.com/jgordon/tag/challenge?feed=rss jgordon's bookmarks tagged "challenge" on Netvouz http://demonstrations.wolfram.com/ A growing collection of interactive illustrations is created by Mathematica users from around the world who participate by contributing innovative Demonstrations. Anyone can preview a Demonstration online, and interact with it using the free Mathematica Player (http://www.wolfram.com/products/player/). Those with Mathematica software (not free) can also experiment with and modify the code on their own computers. Very extensive collection Science and Math > MATH ONLY jgordon Tue, 15 Apr 2008 22:04:39 GMT