Apparently, this user prefers to keep an air of mystery about them.
25 Can closed compacts in a topological group behave “paradoxically” with respect to unions, intersections, and one-sided translations? jul 24 '13
7 Is the Euler characteristic of aspherical connected 2-complexes at most 1? (No!) What can be said about subcomplexes of 2-complexes deformation retractible onto graphs. jan 30 '12