Apparently, this user prefers to keep an air of mystery about them.
6 Why is the the classifying space of the natural numbers homotopy equivalent to the circle? Apr 14 '12
3 General Equilibrium for Mathematicians Sep 6 '10
3 The higher Van Kampen Theorems and computation of the unstable homotopy groups of spheres Sep 24 '10
1 Thom first isotopy lemma in o-minimal structures May 2 '10
0 General Linear Inverse Monoid Sep 25 '10