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20h

comment 
Group with finite outer automorphism group and large center
I added some details. 
20h

revised 
Group with finite outer automorphism group and large center
added 980 characters in body 
Jul 4 
awarded  gr.grouptheory 
Jul 3 
answered  Group with finite outer automorphism group and large center 
Jul 2 
comment 
Group with finite outer automorphism group and large center
Yves, "transposition" should read contrgradient ($X\mapsto (X^t)^{1}$). Also, $\mbox{Aut}(Z(G))$ should read $\mbox{Aut}(G/Z(G))$. 
Jun 28 
reviewed  Approve What is deforming this noncomplete intersection like? 
Jun 2 
awarded  Yearling 
Feb 4 
awarded  Announcer 
Dec 9 
reviewed  Approve Local fractional Sobolev inequality 
Dec 8 
awarded  Civic Duty 
Dec 7 
reviewed  Approve Is any connected fibre of a fibration of a sphere also a sphere? 
Dec 6 
comment 
Is the free abstract group residually of rank d > 2?
This rank was introduced by Malcev and is called special rank. Namely, The special rank of a group $G$ is the minimal $d$ such that every finitely generated subgroup of $G$ can be generated by $d$ elements. 
Dec 4 
comment 
Is the free abstract group residually of rank d > 2?
And why there are no such words $w(x,y)\in F_2$? 
Dec 3 
reviewed  Approve Question regarding to approximate continuity 
Dec 3 
reviewed  Reject Reference on representations of knot groups 
Nov 30 
reviewed  Approve Topological Ktheory for commutative C*algebras 
Nov 27 
comment 
Realizing a monoid as $\mathrm{End}(G)$ for some graph $G$
Actually, their theorem states this under some cardinality constraints: gdz.sub.unigoettingen.de/… 
Nov 27 
comment 
Realizing a monoid as $\mathrm{End}(G)$ for some graph $G$
Are loops allowed? 
Nov 27 
comment 
Powers of finite simple groups
Oh, I see: mathoverflow.net/a/53162/24165 
Nov 23 
comment 
Powers of finite simple groups
The automorphism groups of finite simple groups are well known. So, we have to calculate the (nonreduced) Euler function $\phi_n(G)$ (ie. the number of generating ntuples). In Section 1.1, Collins describes a technique of such calculations that allowed Hall (in 1936) to calculate, e.g., $\phi_2(A_5)=19\cdot 120$ (ie. $h_2(A_5)=19$). 