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location Ottawa, Canada
age 41
visits member for 1 year, 7 months
seen Apr 15 at 22:58

Jun
11
comment On the $F$-rational points of the derived group of a connected reductive algebraic group
Thanks so much for the detailed explanation!
Jun
11
accepted On the $F$-rational points of the derived group of a connected reductive algebraic group
Jun
10
comment On the $F$-rational points of the derived group of a connected reductive algebraic group
To Ayanta: Thanks very much! I would accept your first comment as an answer to my first question, if you'd post it as such. For the second comment: since $G\times G \to G$ is not a homomorphism, I don't see how to recover $[G(F),G(F)]$ using Galois cohomology (or from your argument).
Jun
7
asked On the $F$-rational points of the derived group of a connected reductive algebraic group
Feb
17
awarded  Teacher
Feb
16
revised Intersections of anisotropic tori with split Levi subgroups
Adding more examples, rephrasing question to be catchier
Feb
16
awarded  Scholar
Feb
16
accepted When is a Moy-Prasad filtration subgroup the stabilizer of a subset of the building (up to center)?
Feb
16
revised When is a Moy-Prasad filtration subgroup the stabilizer of a subset of the building (up to center)?
contains vs is contained in
Feb
16
answered When is a Moy-Prasad filtration subgroup the stabilizer of a subset of the building (up to center)?
Feb
8
comment Intersections of anisotropic tori with split Levi subgroups
Thank you very much for the corrections (sorry for the delay of this comment): indeed all groups are F-stable, T is maximal (ensuring, in particular, that it contains Z); and the groups in question are $T^F$ and $L^F$.
Feb
8
revised Intersections of anisotropic tori with split Levi subgroups
added F-stable
Feb
7
awarded  Supporter
Feb
7
revised When is a Moy-Prasad filtration subgroup the stabilizer of a subset of the building (up to center)?
Improved formatting.
Feb
7
revised Intersections of anisotropic tori with split Levi subgroups
I had forgotten to add T maximal, without which Z need not lie in T^F.
Feb
7
awarded  Editor
Feb
7
revised Intersections of anisotropic tori with split Levi subgroups
@Jim Humphreys: thank you; I meant T^F and L^F and have corrected these!
Feb
6
asked Intersections of anisotropic tori with split Levi subgroups
Feb
5
awarded  Student
Feb
5
asked When is a Moy-Prasad filtration subgroup the stabilizer of a subset of the building (up to center)?