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blt
  • Member for 14 years, 2 months
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30 votes
4 answers
10k views

Outer automorphisms of simple Lie Algebras

19 votes
3 answers
3k views

Abelianization of a semidirect product

10 votes
3 answers
954 views

Why do we see SU(2,R) in the Local automorphic Langlands group?

7 votes
2 answers
429 views

Taking roots in simple linear algebraic groups

7 votes
2 answers
306 views

When are all characteristic l representations liftable

6 votes
1 answer
517 views

obstruction to taking the square root of a Galois character

6 votes
1 answer
1k views

Chopping up Dynkin diagrams

4 votes
0 answers
657 views

Can every Galois character phi with phi phi^c = 1 be written as psi/psi^c?

4 votes
1 answer
924 views

What is the minimum number of independent sets for a graph with fixed numbers of vertices and edges?

4 votes
2 answers
562 views

If split algebraic groups are potentially isomorphic, are they isomorphic?

3 votes
1 answer
373 views

Hyperspecial subgroup of a product of semisimple algebraic groups

2 votes
1 answer
303 views

Image of a hyperspecial subgroup hyperspecial?

2 votes
1 answer
473 views

Automorphism of algebraic group preserving a hyperspecial maximal compact

2 votes
1 answer
76 views

If we take a small subset of a sparse/uniform set system, how uniform can we arrange for the subset to be?