Top network posts

• 16 Why are subsets of compact sets not compact?
• 11 For $n \times n$ matrices $A$ and $B$, if $(A^i - B^i)x = 0$ for $i = 1, \dots,\ n$, does $(A^{n+1} - B^{n+1}) x = 0$?
• 10 Bounds of $1^n + 2^{n-1} + 3^{n-2} + \cdots + n^1$
• 9 Can non-isomorphic abelian groups have isomorphic endomorphism rings?
• 9 find maximum value of $\frac x{(x^2+1)^{\frac32}}$ with AM-GM inequality
• 8 Replace Complex Head with List
• 6 Is Pythagoras' theorem about distances or areas?
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