257 reputation
16
bio website rupertmccallum.com
location Germany
age 37
visits member for 2 years, 11 months
seen Apr 15 at 15:59
I am doing a post-doctoral research position about topological buildings and topological groups at the University of M√ľnster.

Apr
15
awarded  Commentator
Apr
15
comment Is the group of rational points of an anisotropic absolutely quasi-simple algebraic group over a non-archimedean local field known to be perfect?
Many thanks, I wonder if you could give me a reference for a proof of the fact that those are the only examples, is it in Platonov's book?
Apr
14
asked Is the group of rational points of an anisotropic absolutely quasi-simple algebraic group over a non-archimedean local field known to be perfect?
Apr
14
asked abstract simplicity results for anisotropic quasi-simple algebraic groups defined over a non-archimedean local field
Apr
11
asked Maximal tori in SL_2(k) with k an algebraically closed field of characteristic two
Mar
29
accepted How do you prove that Q+Con(PA) can't be interpreted in ACA_0?
Mar
27
awarded  Editor
Mar
27
revised How do you prove that Q+Con(PA) can't be interpreted in ACA_0?
added 405 characters in body
Mar
27
asked How do you prove that Q+Con(PA) can't be interpreted in ACA_0?
Mar
24
awarded  Yearling
Mar
24
asked ubiquity of free subgroups of special linear groups
Mar
21
asked definition of an avatar of a tree-automorphism group
Feb
24
awarded  Nice Question
Jan
23
comment subsets of groups which have to be closed no matter what
Anton, yes, this is related to a research problem I am working on about the rigidity of the group topology on certain locally compact groups, and yes, you are right that I should have said Hausdorff.
Jan
23
accepted subsets of groups which have to be closed no matter what
Jan
22
asked subsets of groups which have to be closed no matter what
Jan
22
asked compact centralisers in maximal Kac-Moody groups over finite fields
Jan
13
comment conjugacy classes in anisotropic semisimple groups
Okay, great, thanks, what happens in positive characteristic? Is it still true then that elements of $G(k)$ are always semisimple?
Jan
10
comment conjugacy classes in anisotropic semisimple groups
I find it quite interesting that you say that the elements of $G(k)$ are always semisimple; are you able to give me a reference for that?
Jan
10
accepted conjugacy classes in anisotropic semisimple groups