Voldemort

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1,359 reputation

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visits	member for	2 years, 2 months
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66 Questions

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15	How do I prove that $\cos{\frac{2\pi}{7}}\notin\mathbb{Q}$?
14	Is the set of real numbers the largest possible totally ordered set?
12	A matrix is diagonalizable, so what?
12	Can $2^n$ and $2^{n+1}$ have the same digit sum?
10	What is the largest determinant you can get by filling in 0,1 or 2 into a 4-by-4 matrix?

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1,359 Reputation

+20	Why the root of this tree has to be “1”?
+5	Is it always true that $A^o=(\overline{A})^{o}$?
+5	How do I find the minimum size of a generating set of a group?
+5	Prove that you can't connect both pairs of opposite sides of a square without the two paths intersected.

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2 Answers

votes activity newest

9	What is the largest determinant you can get by filling in 0,1 or 2 into a 4-by-4 matrix?
0	How do I prove that in every commuting family there is a common eigenvector?

38 Tags

9 matrices × 15	0 logic × 3
0 probability × 10	0 notation × 3
0 linear-algebra × 10	0 functional-analysis × 3
0 general-topology × 5	0 group-theory × 2
0 calculus × 5	0 random-walk × 2

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	Stack Overflow	605 rep	312
	Unix & Linux	173 rep	4
	Ask Ubuntu	172 rep	4

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Popular Question	Tumbleweed
Nice Question × 5	Commentator
Critic	Scholar
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