Grigory M

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6,330 reputation

21535

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	location	Moscow, Russia
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visits	member for	1 year, 10 months
	seen	14 hours ago
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110 Answers

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20	Solution to $1-f(x) = f(-x)$
17	Asymmetric Hessian matrix
16	Evaluate $ \binom{n}{0}+\binom{n}{2}+\binom{n}{4}+\cdots+\binom{n}{2k}+\cdots$
15	Why can't I combine complex powers
13	What functor does $K(G, 1)$ represent for nonabelian $G$?

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6,330 Reputation

+10	How do you prove that a group specified by a presentation is infinite?
+10	How to compute homotopy classes of maps on the 2-torus?
+5	Counting subsets with r mod 5 elements
+5	Geometric Proof of the Formula for Simplex Numbers

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11 Questions

votes activity newest

13	Explicit formula for Fermat's 4k+1 theorem
11	Counting subsets with r mod 5 elements
11	Why $PSL_3(\mathbb F_2)\cong PSL_2(\mathbb F_7)$?
8	Geometric Proof of the Formula for Simplex Numbers
7	Direct proof of Gelfand-Zetlin identity

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86 Tags

176 algebraic-topology × 51	26 algebra-precalculus × 3
44 binomial-coefficients × 6	23 abstract-algebra × 8
40 combinatorics × 13	22 classifying-spaces × 3
33 number-theory × 7	21 topological-k-theory × 7
28 group-theory × 9	20 homotopy-theory × 9

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26 Accounts

$Mathematics$	Mathematics	6,330 rep	21535
$TeX - LaTeX$	TeX - LaTeX	1,343 rep	520
	Area 51	466 rep	6
	Meta Stack Overflow	361 rep	48
	Super User	126 rep	4

52 Badges

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Enlightened × 6	Strunk & White
Nice Answer × 12	Deputy
Tag Editor	Self-Learner
Fanatic	Electorate
Nice Question × 3	Analytical

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2,076 Votes Cast

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1,766	up		960	question		9
310	down		1,116	answer		9

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