User Jim Humphreys

4 votes

Modular representations with unequal characteristic - reference request

answered May 16, 2012 at 16:04

4 votes

Accepted

Relation Brauer algebra vs. Weyl group for so, sp ? (For GL S_n plays two roles 1) Weyl group 2) SchurWeyl duality )

answered Jun 5, 2012 at 10:35

4 votes

Lie algebras and non-smoothness of centralisers in bad characteristic

answered Apr 10, 2012 at 12:28

4 votes

Type of 26-dimensional representation of different real forms of the complex simple Lie algebra $F_4$

answered May 4, 2012 at 14:42

4 votes

Accepted

Borel subgroups contained in a fixed parabolic subgroup

answered May 27, 2011 at 12:58

4 votes

Primary decomposition and finitely generated abelian groups

answered Jun 3, 2011 at 19:57

4 votes

Universal cover of SL2(R) admits no central extensions?

answered Apr 30, 2011 at 18:35

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$k$ structures on $K$ vector spaces

answered Apr 23, 2011 at 13:34

4 votes

S. Agnihotri, "Quantum cohomology and the Verlinde algebra"

answered Apr 26, 2011 at 22:59

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Chevalley's valuation extension theorem and the axiom of choice

answered Mar 27, 2011 at 22:03

4 votes

Accepted

Character group of Frobenius kernels

answered Mar 8, 2011 at 11:57

4 votes

A naive question about composition factor of a representation

answered Mar 20, 2011 at 22:24

4 votes

Closed reductive sub-orbits

answered Jul 7, 2012 at 14:28

4 votes

Transformation of the fundamental group of Lie groups under group homomorphisms

answered Jun 14, 2012 at 17:48

4 votes

What is the significance that the Springer resolution is a moment map?

answered Jul 17, 2012 at 14:41

4 votes

Kostant partition function: asymptotics and specifics

answered Jul 19, 2012 at 14:55

4 votes

Irreducibility of fundamental Weyl modules

answered Oct 4, 2012 at 12:00

4 votes

Good even grading and principal Levi type

answered Oct 10, 2012 at 12:40

4 votes

Failure of Jacobson-Morozov in positive characteristics

answered Aug 30, 2012 at 19:20

4 votes

When is an orbit spherical?

answered Sep 7, 2012 at 21:59

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Accepted

For finite group G and field k of char=p, if P,P′ are projective k[G]-modules with [P]=[P′], is it true that P=P′ ?

answered Dec 10, 2012 at 13:18

4 votes

Classification of quasi-split unitary groups

answered Dec 14, 2012 at 22:31

4 votes

Morphisms between Verma modules

answered Dec 15, 2012 at 14:05

4 votes

Center of the algebraic group $G_{\mathbb{R}}$ for a centerless $G$

answered Dec 23, 2012 at 16:50

4 votes

Characters separating points on Maximal Torus modulo Weyl group?

answered Jan 12, 2013 at 18:36

4 votes

Dimension of Unipotent Radicals

answered Jan 19, 2013 at 18:04

4 votes

The Lang isogeny

answered Jan 27, 2013 at 22:08

4 votes

Accepted

Question about unusual highest weight modules for $U_q(sl(2))$

answered Feb 19, 2013 at 20:13

4 votes

Accepted

Reduction of antisymmetric complex matrices

answered Apr 30, 2013 at 13:45

4 votes

group generated by Coxeter elements

answered May 5, 2013 at 20:40

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704 Answers

Modular representations with unequal characteristic - reference request

Relation Brauer algebra vs. Weyl group for so, sp ? (For GL S_n plays two roles 1) Weyl group 2) SchurWeyl duality )

Lie algebras and non-smoothness of centralisers in bad characteristic

Type of 26-dimensional representation of different real forms of the complex simple Lie algebra $F_4$

Borel subgroups contained in a fixed parabolic subgroup

Primary decomposition and finitely generated abelian groups

Universal cover of SL2(R) admits no central extensions?

$k$ structures on $K$ vector spaces

S. Agnihotri, "Quantum cohomology and the Verlinde algebra"

Chevalley's valuation extension theorem and the axiom of choice

Character group of Frobenius kernels

A naive question about composition factor of a representation

Closed reductive sub-orbits

Transformation of the fundamental group of Lie groups under group homomorphisms

What is the significance that the Springer resolution is a moment map?

Kostant partition function: asymptotics and specifics

Irreducibility of fundamental Weyl modules

Good even grading and principal Levi type

Failure of Jacobson-Morozov in positive characteristics

When is an orbit spherical?

For finite group G and field k of char=p, if P,P′ are projective k[G]-modules with [P]=[P′], is it true that P=P′ ?

Classification of quasi-split unitary groups

Morphisms between Verma modules

Center of the algebraic group $G_{\mathbb{R}}$ for a centerless $G$

Characters separating points on Maximal Torus modulo Weyl group?

Dimension of Unipotent Radicals

The Lang isogeny

Question about unusual highest weight modules for $U_q(sl(2))$

Reduction of antisymmetric complex matrices

group generated by Coxeter elements