Apparently, this user prefers to keep an air of mystery about them.
14 Proof that no permutation can be expressed both as the product of an even number of transpositions and as a product of an odd number of transpositions Dec 27 '11
11 An inequality from Littlewood's Miscellany Jun 11 '13
7 Relation between cross-product and outer product Aug 13 '12
6 Is $(-\infty,\infty)$ a closed **interval**? Oct 29 '13