Apparently, this user prefers to keep an air of mystery about them.
7 Is it true that any matrix can be decomposed into product of rotation,reflection,shear,scaling and projection matrices? feb 14 '12
6 Regarding usage of $\pm$ sign feb 4 '13
3 About plus-minus sign aug 18 '13
3 Expected value of function of random walk feb 20 '12
3 Is it true that for any square matrix of real numbers A, there exists a square matrix B, such that AB is a symmetric matrix? jan 1 '13
2 Direct formula for elements of power set? jan 17 '13