Guntram

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Name Guntram
Member for 3 years
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Location Münster
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15

Questions
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12
18
votes
3
answers
2k
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What is the difference between PSL_2 and PGL_2?

feb 23 10 at 17:01 BCnrd 4,106●1●38●58

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15
votes
7
answers
1k
views

Which group does not satisfy the Tits alternative?

sep 27 10 at 9:06 Michele Triestino 678●6●15

3
11
votes
5
answers
593
views

Are extensions of linear groups linear?

apr 28 10 at 12:06 Simon Thomas 6,009●1●18●36

 
7
votes
3
answers
531
views

If L is a field extension of K, how big is L*/K*?

mar 15 12 at 20:24 Guntram 2,356●1●7●18

 

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3

1
4
votes
8
answers
2k
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What’s the difference between 2 and 3? [closed]

apr 18 11 at 15:55 Roland Bacher 6,896●10●37

2
3
votes
1
answer
289
views

GL(n+1)- vs. GL(n)-orbits

sep 21 11 at 19:41 Dmitri 16.5k●1●36●77

2
3
votes
1
answer
630
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Jacobson-Morozov on the algebraic group level

apr 23 10 at 14:47 Jim Humphreys 25.9k●37●82

1 2 next

 

25

Answers
votes newest views recent
20
Can nonabelian groups be detected “locally”?
16
Cayley graphs of finitely generated groups
14
Covering maps in real life that can be demonstrated to students
10
Is Q_r algebraically isomorphic to Q_s while r and s denote different primes?
9
Is there a simple proof that a group of linear growth is quasi-isometric to Z?
7
Slick proof related to choosing points from an interval in order
7
Best approximation to the Weyl group as a subgroup of a reductive group.
7
Are there some nontrivial group homomorphisms from $SL_n(\mathbb{Z})$ to $GL_{n-1}(\mathbb{Z})$ for $n\geq3$?
6
generators of Out(F_n) and homology
5
Is the first part of Eisenbud’s Proposition 15.15’s proof o.k?
5
Automorphisms of $SL_n(\mathbb{Z})$
5
Are isometries the only geodesic preserving maps in a CAT(0)-space?
5
Finitely presented groups which are not residually amenable
4
Infinite dimensional division algebras with finite center, and their involutions
4
algebraic closure of commuting pairs of matrices
3
Center of a Symmetric Group on an Infinite Set
3
A decision problem concerning polynomial rings
3
Periodic Automorphism Towers
2
If split algebraic groups are potentially isomorphic, are they isomorphic?
2
Groups with trivial centralizer-connected component
1
What is this measure on the affine Weyl group?
1
Homomorphisms of Lie groups preserving regularity
1
〈x,y : x^p = y^p = (xy)^p = 1〉
0
Can we unify addition and multiplication into one binary operation? To what extent can we find universal binary operations?
0
Clifford theory: behaviour of a very general irreducible representation under restriction to a finite index subgroup.

 

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