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Chrystomath

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

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16 Why are subsets of compact sets not compact? Feb 12 '19
12 For $n \times n$ matrices $A$ and $B$, if $(A^i - B^i)x = 0$ for $i = 1, \dots,\ n$, does $(A^{n+1} - B^{n+1}) x = 0$? Aug 13 '20
10 Can non-isomorphic abelian groups have isomorphic endomorphism rings? Jun 27 '13
9 find maximum value of $\frac x{(x^2+1)^{\frac32}}$ with AM-GM inequality Aug 10 '20
9 Does ONLY the ellipse have these properties? Aug 23 '20
9 Bounds of $1^n + 2^{n-1} + 3^{n-2} + \cdots + n^1$ Jul 14 '20
7 Is Pythagoras' theorem about distances or areas? Jul 15 '17
6 Topological vector space with discrete topology is the zero space Mar 17 '16
6 Product of n integers of AP is divisible by $n!$ Jan 29 '19
6 What vector x will maximize the norm of $\|Ax\|_2 / \|x\|_2$ (norm 2) Feb 14 '19
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