George McNinch's user avatar
George McNinch's user avatar
George McNinch's user avatar
George McNinch
  • Member for 14 years
  • Last seen more than a week ago
20 votes

Geometric vs Arithmetic Frobenius

19 votes
Accepted

Lifting varieties to characteristic zero.

14 votes

Is the normalizer of a reductive subgroup reductive?

13 votes

"Why" is every polynomial representation of SL(2) selfdual?

12 votes
Accepted

Do semisimple algebraic groups always have faithful irreducible representations?

12 votes
Accepted

Tensor product of simple representations

12 votes

Describing Levi factors and unipotent radicals of parabolic subgroups in classical groups

11 votes

cohomology theory for algebraic groups

10 votes

What are "classical groups"?

8 votes
Accepted

What are the basic possibilities for a tensor product of two fields?

7 votes
Accepted

Parahoric Group Scheme

7 votes

Rational forms of simple Lie algebras

7 votes
Accepted

Cayley Transform for all reductive groups a.k.a an algebraic logarithm

7 votes
Accepted

Innocent question on tensor products of modular representations

7 votes

If a tensor product of modules is semi-simple, are the tensor factors semi-simple ?

7 votes

any linear algebraic group rational?

6 votes
Accepted

Connectedness of centralizers and regular elements in unipotent groups

6 votes

Comparing algebraic group orbits over big and small algebraically closed fields

6 votes

Are the Weyl modules projectives?

6 votes

Rationality of algebraic groups

5 votes

Are the unipotent and nilpotent varieties isomorphic in bad characteristics?

5 votes

Density question in algebraic group

5 votes

Existence of proper invariant subset in an irreducible action

5 votes

surjectivity of irreducible representation

5 votes
Accepted

Springer isomorphisms and parabolics

5 votes

Non-split extensions of $GL_n(F_q)$ by $F_q^n$ ?

4 votes

Whenever I read "centraliser of maximal split torus", I think of...

4 votes
Accepted

Uniform setting for computing orders of algebraic groups over finite quotients of the integers?

4 votes

About $G$-modules versus $Lie(G)$-modules for algebraic groups

4 votes

Quotients of Schemes by Free Group Actions