User Jim Humphreys

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Rationality of flag varieties

answered Apr 12, 2011 at 16:39

7 votes

Relative Lie Algebra cohomology and sheaf cohomology

answered Apr 13, 2011 at 18:19

7 votes

Is the preimage of the closure the closure of the preimage under a quotient map?

answered Sep 3, 2011 at 16:11

7 votes

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What are the irreducible modular representations of $SU(n,p)$?

answered Nov 7, 2011 at 20:36

7 votes

Commutator of closed subgroups

answered Mar 4, 2012 at 20:18

7 votes

Whitehead lemmas in Lie algebra cohomology for non-algebraically closed fields

answered Mar 9, 2012 at 19:00

7 votes

Soft(?) algebraic groups question

answered Mar 10, 2012 at 16:45

7 votes

connected compact semisimple lie group finite fundamental group

answered May 1, 2012 at 13:10

7 votes

The number of Sylow subgroups in groups of Lie type

answered Mar 15, 2012 at 15:18

7 votes

Are there other ways to show Pic(G)is trivial when G is a simple-connected semisimple algebraic groups over C?

answered May 15, 2012 at 13:26

7 votes

Sign conventions for a Chevalley basis of a simple complex Lie algebra

answered Dec 17, 2011 at 23:31

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Do representations of finite groups of Lie type preserve diagonalizable elements?

answered May 20, 2010 at 11:00

7 votes

Statements reliant on conjectures

answered Jun 20, 2010 at 20:41

7 votes

What are the maximal subgroups of GSp(2g,l)?

answered Apr 17, 2010 at 11:30

7 votes

How to find ICM talks?

answered Apr 1, 2010 at 15:25

7 votes

Theorem versus Proposition

answered Mar 16, 2010 at 18:01

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References for theorem about unipotent algebraic groups in char=0?

answered Mar 20, 2010 at 18:37

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Harmonic analysis on semisimple groups - modern treatment

answered Oct 7, 2010 at 17:15

7 votes

A good place to read about uniform spaces

answered Aug 29, 2010 at 12:21

7 votes

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Congruence Subgroups as Open Subgroups of the Modular Group Under the Right Topology

answered Aug 26, 2010 at 17:06

7 votes

Is there a name for the involution on Laurent polynomials?

answered Dec 10, 2010 at 21:56

7 votes

Occurrence of semi-spin groups

answered Dec 1, 2010 at 15:13

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What is a Specht module?

answered Feb 26, 2011 at 11:31

7 votes

What is Jantzen's formula for the determinant of the Shapovalov form in the case of generalized Verma modules?

answered Jul 5, 2015 at 14:58

7 votes

Confusion about Subcategories of Category $\mathcal{O}$

answered Oct 6, 2015 at 21:15

7 votes

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For $G$ an adjoint Chevalley group, are all of $G(\mathbb Z)$'s finite-index subgroups congruence subgroups?

answered Jul 11, 2019 at 21:07

7 votes

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Reference request: Models of cuspidal representations of GL(n,k) where k is a finite field

answered Jan 12, 2018 at 12:57

7 votes

Number of points of the nilpotent cone over a finite field and its cohomology

answered May 27, 2018 at 16:52

7 votes

Examples of non-trivial Kazhdan-Lusztig polynomials

answered Sep 12, 2018 at 18:59

6 votes

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a question on Deligne-Lusztig characters

answered Sep 1, 2018 at 20:22

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704 Answers

Rationality of flag varieties

Relative Lie Algebra cohomology and sheaf cohomology

Is the preimage of the closure the closure of the preimage under a quotient map?

What are the irreducible modular representations of $SU(n,p)$?

Commutator of closed subgroups

Whitehead lemmas in Lie algebra cohomology for non-algebraically closed fields

Soft(?) algebraic groups question

connected compact semisimple lie group finite fundamental group

The number of Sylow subgroups in groups of Lie type

Are there other ways to show Pic(G)is trivial when G is a simple-connected semisimple algebraic groups over C?

Sign conventions for a Chevalley basis of a simple complex Lie algebra

Do representations of finite groups of Lie type preserve diagonalizable elements?

Statements reliant on conjectures

What are the maximal subgroups of GSp(2g,l)?

How to find ICM talks?

Theorem versus Proposition

References for theorem about unipotent algebraic groups in char=0?

Harmonic analysis on semisimple groups - modern treatment

A good place to read about uniform spaces

Congruence Subgroups as Open Subgroups of the Modular Group Under the Right Topology

Is there a name for the involution on Laurent polynomials?

Occurrence of semi-spin groups

What is a Specht module?

What is Jantzen's formula for the determinant of the Shapovalov form in the case of generalized Verma modules?

Confusion about Subcategories of Category $\mathcal{O}$

For $G$ an adjoint Chevalley group, are all of $G(\mathbb Z)$'s finite-index subgroups congruence subgroups?

Reference request: Models of cuspidal representations of GL(n,k) where k is a finite field

Number of points of the nilpotent cone over a finite field and its cohomology

Examples of non-trivial Kazhdan-Lusztig polynomials

a question on Deligne-Lusztig characters