Apparently, this user prefers to keep an air of mystery about them.
9 Motivation for solution to constructing a set of 1983 distinct integers such that no three are consecutive terms of an arithmetic progression Jan 10 '12
9 Meaning and example(s) of Qiaochu's quote. Oct 17 '12
8 Confusion concerning Burnside's Lemma Apr 22 '12
8 Explanation for why $1\neq 0$ is explicitly mentioned in Chapter 1 of Spivak's Calculus for properties of numbers. Jun 30 '12
6 Linear Algebra and Geometry by Kostrikin and Manin: Remark regarding diagrams and graphic representations. Nov 29 '12
6 If the product of two non-zero square matrices is zero, then both factors must be singular. Feb 21 '12