User Allen Knutson

11 votes

2 answers

245 views

"Positive systems" in n * the (n-1)-simplex

asked Nov 18, 2009 at 19:14

11 votes

2 answers

795 views

What are the implications of torsion in H^2 for geometric quantization?

asked Apr 27, 2010 at 13:22

10 votes

3 answers

1k views

Can injective modules over R give non-injective sheaves over Spec R?

asked Feb 9, 2010 at 4:18

10 votes

1 answer

411 views

Is there much theory of superalgebras acting on manifolds by alternating polyvector fields?

asked Oct 30, 2010 at 3:48

10 votes

1 answer

354 views

Derivation of Blattner's conjecture in the Beilinson-Bernstein picture

asked Sep 25, 2014 at 8:00

10 votes

0 answers

234 views

Branching from GL(a+b) to GL(a) x GL(b)$ using Gel'fand-Cetlin patterns

asked May 12, 2020 at 13:17

9 votes

2 answers

381 views

Why do these two irreps of $E_6$ have the same dimension?

asked Jun 21, 2022 at 18:20

9 votes

1 answer

447 views

"Anticanonical sections" on singular varieties

asked Feb 28, 2016 at 18:45

9 votes

0 answers

213 views

A duality on partial permutations

asked May 19, 2013 at 20:48

9 votes

1 answer

464 views

The highest root of an ADE quiver

asked Oct 12, 2012 at 18:38

8 votes

1 answer

221 views

Cominuscule property of nilpotent orbits

asked Dec 14, 2013 at 23:08

8 votes

1 answer

323 views

Base schemes and Bayesian priors

asked Nov 17, 2015 at 1:04

8 votes

0 answers

267 views

Deformation of the product of symmetric functions

asked Feb 15, 2012 at 22:19

8 votes

0 answers

195 views

Projective duality vs. Fourier transform of IC sheaves

asked Jan 24, 2017 at 3:53

7 votes

0 answers

149 views

Eigenspaces and covering relations of twisted involutions

asked May 22, 2018 at 14:11

7 votes

0 answers

267 views

Generating cycles inside Tits' graph of words for a positive braid

asked Oct 9, 2022 at 15:51

7 votes

2 answers

641 views

If $X$ is an affine variety, is $X$ one component of a complete intersection with two?

asked Nov 9, 2011 at 13:15

7 votes

1 answer

2k views

Noether normalization vs. normalization of varieties

asked Nov 20, 2011 at 13:44

7 votes

1 answer

712 views

Hopf fibration inside the retraction of R^4 minus line -> S^2?

asked May 15, 2010 at 13:08

7 votes

0 answers

295 views

Positivity properties of virtual Hodge numbers of Calabi-Yaus

asked Mar 4, 2010 at 23:46

7 votes

0 answers

649 views

When should a moment polytope have "smooth" faces?

asked Aug 11, 2010 at 18:04

6 votes

1 answer

256 views

Reference for representation of Weyl group using r_𝛼 + c∂_𝛼

asked Jan 13, 2010 at 19:01

6 votes

1 answer

573 views

Is there a "Cartan product" of Harish-Chandra modules?

asked Oct 24, 2011 at 14:08

6 votes

2 answers

315 views

Covering relations in $K\backslash G/B$

asked Mar 15, 2012 at 2:35

6 votes

1 answer

241 views

Inner product on $V_{-\rho}$?

asked Dec 1, 2016 at 4:05

6 votes

0 answers

244 views

Zariski closure of orbits of real groups on complex flag manifolds

asked Mar 13, 2014 at 20:39

6 votes

2 answers

1k views

Determinant of the oriented adjacency matrix of a tree

asked Nov 23, 2014 at 1:51

6 votes

0 answers

219 views

Lindström-Gessel-Viennot from properties of the $Alt^k$ functor?

asked Mar 17, 2022 at 2:33

6 votes

0 answers

183 views

Root system inside the indefinite even unimodular lattice $II_{10,2}$

asked Feb 5, 2017 at 2:16

6 votes

0 answers

159 views

A functional on paths in a symplectic vector space

asked Jun 17, 2017 at 1:30

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81 Questions

"Positive systems" in n * the (n-1)-simplex

What are the implications of torsion in H^2 for geometric quantization?

Can injective modules over R give non-injective sheaves over Spec R?

Is there much theory of superalgebras acting on manifolds by alternating polyvector fields?

Derivation of Blattner's conjecture in the Beilinson-Bernstein picture

Branching from GL(a+b) to GL(a) x GL(b)$ using Gel'fand-Cetlin patterns

Why do these two irreps of $E_6$ have the same dimension?

"Anticanonical sections" on singular varieties

A duality on partial permutations

The highest root of an ADE quiver

Cominuscule property of nilpotent orbits

Base schemes and Bayesian priors

Deformation of the product of symmetric functions

Projective duality vs. Fourier transform of IC sheaves

Eigenspaces and covering relations of twisted involutions

Generating cycles inside Tits' graph of words for a positive braid

If $X$ is an affine variety, is $X$ one component of a complete intersection with two?

Noether normalization vs. normalization of varieties

Hopf fibration inside the retraction of R^4 minus line -> S^2?

Positivity properties of virtual Hodge numbers of Calabi-Yaus

When should a moment polytope have "smooth" faces?

Reference for representation of Weyl group using r_𝛼 + c∂_𝛼

Is there a "Cartan product" of Harish-Chandra modules?

Covering relations in $K\backslash G/B$

Inner product on $V_{-\rho}$?

Zariski closure of orbits of real groups on complex flag manifolds

Determinant of the oriented adjacency matrix of a tree

Lindström-Gessel-Viennot from properties of the $Alt^k$ functor?

Root system inside the indefinite even unimodular lattice $II_{10,2}$

A functional on paths in a symplectic vector space