Courses would benefit from "quick-reference guides like the end of Dror Bar Natan's paper on Khovanov homology http://arxiv.org/abs/math/0201043 http://arxiv.or

Courses would benefit from "quick-reference guides like the end of Dror Bar Natan's paper on Khovanov homology http://arxiv.org/abs/math/0201043 http://arxiv.org/abs/math/0201043 He says "It can fit inside your wallet." See: http://www.math.toronto.edu/drorbn/Talks/HUJI-011104/cube.gif http://www.math.toronto.edu/drorbn/Talks/HUJI-011104/cube.gi...