Apparently, this user prefers to keep an air of mystery about them.
13 Can measures be added by forcing? oct 28 '12
13 What's the difference between ZFC+Grothendieck, ZFC+inaccessible cardinals and Tarski-Grothendieck set theory? jul 22 '12
11 Sets that are not $\infty$-Borel apr 17 '14
9 2D Problems Which are Easier to Solve in 3D sep 10 '12