Apparently, this user prefers to keep an air of mystery about them.
23 Example of 4-manifold with $\pi_1=\mathbb Q$ Jul 1 '13
10 Are there exotic $S^2\times S^2$? Oct 29 '12
9 Is compact flat manifold cusp cross-sections of a complete finite volume hyperbolic manifold? Aug 30 '12
8 Does positively curved sphere admit an isometric embedding as hypersurface in Euclidean space? Oct 4 '13