Apparently, this user prefers to keep an air of mystery about them.
10 Lebesgue measure question on carefully-defined subset of $[0,1]$ and showing that it is measurable Jan 27 '12
5 Computing fundamental groups with Van Kampen Feb 18 '12
4 Revisiting a Lebesgue measure question involving a dense subset of R, translates of a measurable set, etc. Jan 29 '12