Apparently, this user prefers to keep an air of mystery about them.
7 What is the Arithmetical complexity of determining whether a 2-ary computable predicate has exactly one infinite column jun 7 '13
6 Antirandom reals sep 27
5 A question on many-one reducibility feb 23
4 Indices of r.e. sets mar 15 '13
4 Is every non-recursive set in $\Sigma_1$ complete in $\Sigma_1$ (relatively to many-to-one reductions)? mar 22 '14