link | aiju, mathematics | Thu Apr 19 20:00:48 GMT 2012 link | mathematics, theory | Sat Mar 10 02:33:56 GMT 2012 link | mathematics, theory | 2011-06-14 18:33:37 link | ani, mathematics, orb, spheres | 2011-01-09 12:07:05 link | cartography, mathematics, rips_complex | 2011-01-09 12:00:21