User Chuck Hague

27 votes

5 answers

3k views

Why would one expect a derived equivalence of categories to hold?

asked Mar 11, 2010 at 18:03

16 votes

3 answers

2k views

On Category O in positive characteristic

asked Jan 17, 2010 at 19:44

15 votes

2 answers

4k views

Hopf algebra duality and algebraic groups

asked Jul 9, 2010 at 19:10

13 votes

0 answers

943 views

Beilinson-Bernstein localization in positive characteristic

asked Feb 10, 2010 at 17:41

11 votes

1 answer

2k views

Why does the naive choice of homogeneous coordinate ring of a product of projective schemes not work?

asked Apr 6, 2013 at 17:52

9 votes

1 answer

890 views

On q-Demazure operators

asked Oct 9, 2012 at 13:46

9 votes

2 answers

1k views

Relative Lie Algebra cohomology and sheaf cohomology

asked Apr 13, 2011 at 17:21

7 votes

1 answer

764 views

Frobenius splitting of affine flag varieties

asked Feb 24, 2011 at 18:30

7 votes

2 answers

999 views

Kostant's theorem on invariant polynomials in positive characteristic

asked Aug 17, 2012 at 18:41

7 votes

1 answer

306 views

Smooth affine algebraic subgroups as complete intersections

asked Oct 13, 2013 at 20:34

6 votes

0 answers

402 views

What is known about line bundles on the tangent bundle of a flag variety?

asked Sep 16, 2010 at 18:37

6 votes

2 answers

903 views

Frobenius splitting over non-algebraically closed fields

asked Apr 3, 2012 at 18:31

6 votes

0 answers

181 views

On an interesting subalgebra of the functions on the cotangent bundle of the flag variety

asked Jul 30, 2012 at 19:17

5 votes

2 answers

339 views

Decomposition of the ring of functions on the unipotent radical of a Borel

asked Feb 15, 2012 at 21:53

5 votes

0 answers

413 views

Frobenius splitting of tangent bundles of flag varieties

asked Sep 3, 2010 at 15:52

4 votes

1 answer

265 views

Symmetrization for hyperalgebras in positive characteristic

asked Feb 28, 2012 at 20:55

4 votes

0 answers

360 views

On a resolution of sections of line bundles on the cotangent bundle of a flag variety

asked Mar 16, 2012 at 16:18

4 votes

0 answers

203 views

The Killing form on quantized enveloping algebras and reduction to the classical case

asked Aug 2, 2012 at 19:22

3 votes

1 answer

121 views

Lower bound on the degree of a product of elements in a hyperalgebra/enveloping algebra

asked Sep 20, 2011 at 17:52

3 votes

1 answer

559 views

Springer isomorphisms and parabolics

asked Dec 22, 2011 at 19:47

3 votes

0 answers

234 views

Generators and relations for the enveloping algebra of a unipotent radical

asked Mar 23, 2012 at 18:49

3 votes

0 answers

250 views

On the associated graded ring to a section ring

asked May 23, 2013 at 19:42

3 votes

2 answers

179 views

On local parameters at the origin in an algebraic group

asked Dec 20, 2012 at 20:47

2 votes

1 answer

494 views

On the divided power ring over the integers

asked Nov 12, 2012 at 20:04

2 votes

0 answers

262 views

Chevalley groups over $k[t]/t^n$

asked Nov 16, 2013 at 21:51

1 vote

0 answers

140 views

Enveloping algebras of map algebras as hyperalgebras of algebraic groups

asked Dec 25, 2013 at 22:24

1 vote

0 answers

93 views

The structure of symmetric powers of finite-dimensional local rings

asked Feb 4, 2014 at 18:34

1 vote

1 answer

1k views

On the blow-up along the diagonal in a product

asked Jan 11, 2013 at 16:58

1 vote

0 answers

97 views

Degree of a commutator in a hyperalgebra or enveloping algebra

asked Mar 29, 2013 at 21:07

1 vote

0 answers

409 views

Pushforward of equivariant bundles via the Frobenius morphism

asked Jan 31, 2011 at 19:38

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31 Questions

Why would one expect a derived equivalence of categories to hold?

On Category O in positive characteristic

Hopf algebra duality and algebraic groups

Beilinson-Bernstein localization in positive characteristic

Why does the naive choice of homogeneous coordinate ring of a product of projective schemes not work?

On q-Demazure operators

Relative Lie Algebra cohomology and sheaf cohomology

Frobenius splitting of affine flag varieties

Kostant's theorem on invariant polynomials in positive characteristic

Smooth affine algebraic subgroups as complete intersections

What is known about line bundles on the tangent bundle of a flag variety?

Frobenius splitting over non-algebraically closed fields

On an interesting subalgebra of the functions on the cotangent bundle of the flag variety

Decomposition of the ring of functions on the unipotent radical of a Borel

Frobenius splitting of tangent bundles of flag varieties

Symmetrization for hyperalgebras in positive characteristic

On a resolution of sections of line bundles on the cotangent bundle of a flag variety

The Killing form on quantized enveloping algebras and reduction to the classical case

Lower bound on the degree of a product of elements in a hyperalgebra/enveloping algebra

Springer isomorphisms and parabolics

Generators and relations for the enveloping algebra of a unipotent radical

On the associated graded ring to a section ring

On local parameters at the origin in an algebraic group

On the divided power ring over the integers

Chevalley groups over $k[t]/t^n$

Enveloping algebras of map algebras as hyperalgebras of algebraic groups

The structure of symmetric powers of finite-dimensional local rings

On the blow-up along the diagonal in a product

Degree of a commutator in a hyperalgebra or enveloping algebra

Pushforward of equivariant bundles via the Frobenius morphism