http://www.1729.com Womcat Bookmarks for Philip Dorrell. Womcat Bookmarks 2.1.0 Mathematics http://mathworld.wolfram.com/ This is one the best online mathematics encyclopedias for the serious mathematician. Mathematics Wed, 4 Aug 2004 14:44:58 +1200 http://www.claymath.org/ Home of the seven famous million dollar competitions. The competitions include NP-hard completeness, the Riemann hypothesis, the Poincare conjecture (possibly solved), the solubility of Navier-Stokes equations, and a few other problemas even more obscure. Mathematics Wed, 4 Aug 2004 14:44:58 +1200 http://www.cs.auckland.ac.nz/CDMTCS/chaitin/omega.html About the strange incomputable Omega number. Mathematics Wed, 4 Aug 2004 14:45:01 +1200 http://www.1729.com/wiki/IntegerZone.html IntegerZone is an applet that contains various modes representing different mathematical concepts, in which the integers themselves form the major part of the user interface. Mathematics/Educational Mathematics Software Wed, 4 Aug 2004 14:44:59 +1200 http://www.ics.uci.edu/~eppstein/junkyard/ Links to a lot of interesting stuff about geometry from David Eppstein. Mathematics/Geometry Wed, 4 Aug 2004 14:45:00 +1200 http://members.tripod.com/~dogschool/cubegroups.html A good explanation of the group theory behind Rubik's cube, with a few pretty pictures as well. Mathematics/Group Theory Wed, 4 Aug 2004 14:44:58 +1200 http://www.oswego.edu/~baloglou/103/seventeen.html Tutorial about two dimensional crystallography with lots of coloured diagrams. Mathematics/Group Theory Wed, 4 Aug 2004 14:44:59 +1200 http://www-lp.doc.ic.ac.uk/UserPages/staff/rak/rak.html Books and articles on logic, applied to real world problem solving. Mathematics/Logic Wed, 4 Aug 2004 14:45:00 +1200 http://www.1729.com/wiki/HumanSieveOfEratosthenes.html A classroom game for acting out the Sieve of Eratosthenes. Mathematics/Mathematics Education Wed, 4 Aug 2004 14:44:59 +1200