User user148212

12 votes

1 answer

380 views

Branching rule of $S_n$ and Springer theory

asked Dec 19, 2021 at 1:36

9 votes

0 answers

273 views

Why the hyperoctahedral group is a ``reductive'' group?

asked May 11, 2018 at 8:31

8 votes

1 answer

306 views

Does $G_2(\mathbb{Z})$ depend on the choice of an integral model?

asked Feb 5, 2021 at 7:46

6 votes

0 answers

122 views

How to decompose cuspidal representations?

asked Aug 16, 2017 at 16:20

6 votes

0 answers

284 views

An analogue of Deligne--Lusztig theory for real groups?

asked Jan 21, 2016 at 9:40

5 votes

0 answers

274 views

On rational points in an affine space

asked Apr 8, 2017 at 20:11

5 votes

1 answer

520 views

When the longest element of Weyl group is rational?

asked Apr 11, 2017 at 12:03

5 votes

2 answers

330 views

The defining characteristic representations of Lie type groups

asked Dec 7, 2017 at 6:00

4 votes

0 answers

327 views

When is the etale cohomology of a surface free?

asked Jan 11, 2018 at 3:43

4 votes

0 answers

90 views

Counting cuspidal representations using polynomials

asked Sep 6, 2021 at 7:47

4 votes

1 answer

506 views

Quotient of a reductive group by a Levi subgroup and locally triviality

asked Feb 18, 2016 at 21:57

4 votes

0 answers

228 views

Varieties with only top $\ell$-adic cohomology not vanish?

asked Feb 24, 2016 at 13:15

4 votes

0 answers

156 views

Weil structures and rational structures on $\overline{\mathbb{Q}}_{\ell}$-sheaves

asked Nov 3, 2015 at 14:00

3 votes

1 answer

642 views

Integral model of a reductive group over a prime field

asked Nov 21, 2016 at 14:15

2 votes

1 answer

108 views

On components of centralisers in unipotent groups

asked Jan 29, 2020 at 8:59

2 votes

1 answer

344 views

When is a $\overline{\mathbb{Q}}_{\ell}$-local system the inverse image of a $\overline{\mathbb{Q}}_{\ell}$-local system?

asked Feb 16, 2016 at 0:49

2 votes

1 answer

265 views

A homotopy argument in etale topology

asked Mar 10, 2016 at 11:59

2 votes

1 answer

201 views

On cuspidal maximal tori of a connected reductive group

asked May 21, 2017 at 12:57

1 vote

0 answers

538 views

Rational structures on the flag variety over a finite field

asked Jul 20, 2014 at 15:16

Stack Exchange Network

19 Questions

Branching rule of $S_n$ and Springer theory

Why the hyperoctahedral group is a ``reductive'' group?

Does $G_2(\mathbb{Z})$ depend on the choice of an integral model?

How to decompose cuspidal representations?

An analogue of Deligne--Lusztig theory for real groups?

On rational points in an affine space

When the longest element of Weyl group is rational?

The defining characteristic representations of Lie type groups

When is the etale cohomology of a surface free?

Counting cuspidal representations using polynomials

Quotient of a reductive group by a Levi subgroup and locally triviality

Varieties with only top $\ell$-adic cohomology not vanish?

Weil structures and rational structures on $\overline{\mathbb{Q}}_{\ell}$-sheaves

Integral model of a reductive group over a prime field

On components of centralisers in unipotent groups

When is a $\overline{\mathbb{Q}}_{\ell}$-local system the inverse image of a $\overline{\mathbb{Q}}_{\ell}$-local system?

A homotopy argument in etale topology

On cuspidal maximal tori of a connected reductive group

Rational structures on the flag variety over a finite field