m. k.

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7,307 reputation

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bio	website	coolnumbers.wordpress.com
	location	Everywhere
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169 Answers

votes activity newest

18	How to prove $\|z_1-z_2\| \geq \|z_1\|-\|z_2\|$ in other way than this?
15	Is there a formula for $(1+i)^n+(1-i)^n$?
14	More than 99% of groups of order less than 2000 are of order 1024?
14	If a finite group $G$ is solvable, is $[G,G]$ nilpotent?
14	Prove $2^{1/3}$ is irrational.

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7,307 Reputation

+5	Finding an outer automorphism of $S_6$
+5	Does every Abelian group admit a ring structure?
+10	Finite group for which $\|\{x:x^m=e\}\|\leq m$ for all $m$ is cyclic.
+10	How to show that the commutator subgroup is a normal subgroup

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18 Questions

votes activity newest

21	Lower bounds on the number of elements in Sylow subgroups
19	Does every Abelian group admit a ring structure?
15	When does every group with order divisible by $n$ have a subgroup of order $n$?
13	Why does calculating matrix inverses, roots, etc. using the spectrum of a matrix work?
11	Upper bounds on the size of $\operatorname{Aut}(G)$

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69 Tags

389 group-theory × 121	33 complex-numbers × 2
220 abstract-algebra × 81	22 irrational-numbers × 3
181 finite-groups × 52	18 simple-groups × 6
67 homework × 26	15 combinatorics × 3
42 elementary-number-theory × 12	15 decimal-expansion × 2

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2 Accounts

$Mathematics Stack Exchange$	Mathematics	7,307 rep	1739
	Stack Overflow	101 rep

31 Badges

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Caucus × 2	Nice Question × 5
Custodian × 2	Informed
Enlightened × 3	Promoter
Nice Answer × 9	abstract-algebra
finite-groups	Yearling

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