Mathematics
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thanasissdr

Apparently, this user prefers to keep an air of mystery about them.

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14 How to solve this exponential equation? Aug 3 '15
9 Prove that $\text{rank } T = \operatorname{rank} T^2 \iff \operatorname{Im}T \cap \ker T = \{ \vec 0\}$ May 26 '16
9 Definition of reducible matrix and relation with not strongly connected digraph Jun 28 '15
8 Can we infer that $\det(A+D)$ is always $\neq 0$, with $D$ diagonal matrix and $\det A=0$? Jul 19 '15
8 Solving a radical equation for real $x$ May 4 '16
7 How do i determine maximum or minimum at (1,1) of function $ f(x,y)=(x-y)^{4} + (y-1)^{4}$ Aug 20 '15
6 Proving that a symmetric matrix is positive definite iff all eigenvalues are positive Sep 13 '15
6 Probability of an event occuring at least once in 50 tries Jul 12 '15
6 Show by example that $A \ge B \ge 0 \implies A^2 \ge B^2 \ge 0$ is not true in general Jul 10 '16
6 How to prove $\frac xy + \frac yx \ge 2$ Oct 24 '15
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