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Guntram
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question
35
What is the difference between PSL_2 and PGL_2?
Feb 23, 2010
question
23
Which group does not satisfy the Tits alternative?
Sep 14, 2010
answer
21
Can nonabelian groups be detected "locally"?
Oct 12, 2011
answer
19
Covering maps in real life that can be demonstrated to students
Dec 6, 2012
question
19
Are extensions of linear groups linear?
Apr 28, 2010
answer
18
Cayley graphs of finitely generated groups
Mar 23, 2010
answer
15
Is $x^p-x+1$ always irreducible in $\mathbb F_p[x]$?
May 19, 2014
answer
13
Is Q_r algebraically isomorphic to Q_s where r and s denote different primes?
Dec 23, 2011
answer
11
Is there a simple proof that a group of linear growth is quasi-isometric to Z?
Apr 16, 2010
answer
10
Slick proof related to choosing points from an interval in order
Mar 31, 2010
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24
Quickest way to include graphics
8
Three-dimensional simple Lie algebras over the rationals
7
The zeros of a multivariable polynomial
6
Russian chess school maxim: draw after loss (?)
5
Symmetric matrices as module over the skewsymmetric ones