552 reputation
211
bio website rupertmccallum.com
location Germany
age 39
visits member for 4 years, 3 months
seen yesterday
I am doing a post-doctoral research position about topological buildings and topological groups at the University of M√ľnster.

Aug
3
comment roots in a root system which have nonzero coefficients with respect to each simple root
Is there any place on the internet or in the literature where all the roots in the $E_6$, $E_7$ or $E_8$ root systems are written out explicitly as linear combinations of simple roots?
Aug
3
accepted roots in a root system which have nonzero coefficients with respect to each simple root
Jul
31
asked roots in a root system which have nonzero coefficients with respect to each simple root
Jun
23
accepted Understanding how to construct Bruhat-Tits buildings for non-split groups by Galois descent
Jun
23
asked Understanding how to construct Bruhat-Tits buildings for non-split groups by Galois descent
Jun
1
asked artinian quotients of U(g)
May
19
asked abelian subgroups of the automorphism group of a totally disconnected LCA group
May
2
awarded  Supporter
May
2
accepted Arithmetic quotients of Bruhat-Tits buildings for groups over local fields of positive characteristic
Apr
24
comment rank of a Lie group over a non-archimedean local field of positive characteristic
I don't want to assume semisimplicity, and yes I was wanting to use that definition of Cartan subalgebra. My question was about Lie groups, I just recently checked out Serre's book "Lie algebras and Lie groups" which describes how to associate a Lie algebra with any Lie group over a non-archimedean local field. With an arbitrary Lie group over a local field of positive characteristic, not necessarily semisimple in any sense, I am wondering how you define the rank of that Lie group.
Apr
24
asked rank of a Lie group over a non-archimedean local field of positive characteristic
Apr
20
comment Arithmetic quotients of Bruhat-Tits buildings for groups over local fields of positive characteristic
Many thanks for your help, if you happen to know a reference for the result of Soulé that would be great.
Apr
17
awarded  Custodian
Apr
17
revised Arithmetic quotients of Bruhat-Tits buildings for groups over local fields of positive characteristic
corrected spelling
Apr
17
reviewed Approve Arithmetic quotients of Bruhat-Tits buildings for groups over local fields of positive characteristic
Apr
17
asked Arithmetic quotients of Bruhat-Tits buildings for groups over local fields of positive characteristic
Mar
9
awarded  Yearling
Mar
9
comment proving that a smooth curve in Euclidean n-space contains n+1 affinely independent points
Okay, great, thanks for pointing that out. I'd still be interested to know a proof of the case $n$ is even if there is one.
Mar
9
accepted proving that a smooth curve in Euclidean n-space contains n+1 affinely independent points
Mar
9
asked proving that a smooth curve in Euclidean n-space contains n+1 affinely independent points