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user148212
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12 votes
1 answer
380 views

Branching rule of $S_n$ and Springer theory

9 votes
0 answers
273 views

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

8 votes
1 answer
306 views

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

6 votes
0 answers
122 views

How to decompose cuspidal representations?

6 votes
0 answers
284 views

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

5 votes
0 answers
274 views

On rational points in an affine space

5 votes
1 answer
520 views

When the longest element of Weyl group is rational?

5 votes
2 answers
330 views

The defining characteristic representations of Lie type groups

4 votes
0 answers
327 views

When is the etale cohomology of a surface free?

4 votes
0 answers
90 views

Counting cuspidal representations using polynomials

4 votes
1 answer
506 views

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

4 votes
0 answers
228 views

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

4 votes
0 answers
156 views

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

3 votes
1 answer
642 views

Integral model of a reductive group over a prime field

2 votes
1 answer
108 views

On components of centralisers in unipotent groups

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?

2 votes
1 answer
265 views

A homotopy argument in etale topology

2 votes
1 answer
201 views

On cuspidal maximal tori of a connected reductive group

1 vote
0 answers
538 views

Rational structures on the flag variety over a finite field