User Allen Knutson - MathOverflow

Allen Knutson

Member for 14 years, 6 months
Last seen more than a week ago

front.math.ucdavis.edu/…
Cornell

276 Answers

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3 votes

Matrices of Lie algebra of Dynkin diagram B2

answered Jan 17, 2011 at 1:06

2 votes

Accepted

Searching for resolutions of generalized determinental varieties

answered Dec 7, 2022 at 13:46

3 votes

Geometric foundation of the Grothendieck polynomials

answered Oct 9, 2022 at 22:20

2 votes

Verma modules and Borel–Weil

answered Oct 9, 2022 at 21:38

18 votes

What are your favorite puzzles/toys for introducing new mathematical concepts to students?

answered Aug 15, 2010 at 1:58

7 votes

Accepted

Which linear combinations of simple roots are roots

answered Jun 17, 2014 at 13:41

3 votes

Problems where we can't make a canonical choice, solved by looking at all choices at once

answered Dec 21, 2010 at 12:36

15 votes

Theorems with unexpected conclusions

answered Mar 14, 2010 at 2:38

10 votes

Representation viewpoint on Chern–Weil (cohomology computations done with rep theory?)

answered Apr 30, 2016 at 13:17

2 votes

Equivariant K-theory of $S^1$-action on $S^2$

answered Nov 4, 2012 at 14:33

2 votes

Skew Kostka coefficients from Littlewood-Richardson Coefficients

answered Dec 12, 2012 at 13:59

14 votes

Necessary and sufficient conditions for Littlewood Richardson coefficients to be non zero

answered Apr 29, 2014 at 21:56

12 votes

What are parabolic bundles good for?

answered Mar 8, 2016 at 3:36

9 votes

Is there an analogue of the hive model for Littlewood-Richardson coefficients of types $B$, $C$ and $D$?

answered Jul 30, 2010 at 14:30

2 votes

Is there a bound on the length of the longest Morse trajectory?

answered Oct 14, 2010 at 17:25

31 votes

Accepted

Why do Littlewood-Richardson coefficients describe the cohomology of the Grassmannian?

answered Feb 5, 2010 at 4:32

3 votes

Analogy of a Fano manifold with anticanonical divisor

answered Oct 12, 2016 at 18:18

2 votes

Real and quaternionic representations according to weights

answered Jun 8, 2015 at 10:39

146 votes

Geometric interpretation of trace

answered Jan 31, 2010 at 2:09

4 votes

Weyl's Branching Rule for $SU(N)$-Setting

answered Apr 8, 2019 at 18:17

17 votes

Reference request: Grassmannian and Plucker coordinates in type B, C, D

answered Mar 30, 2019 at 14:52

2 votes

Accepted

Quiver variety analogue of Grothendieck-Springer resolution

answered Jan 15, 2019 at 2:00

5 votes

On the cohomology ring of the Grassmannian

answered Jul 6, 2010 at 3:07

9 votes

Structure of Kähler cone

answered Jul 8, 2010 at 5:58

18 votes

Accepted

Proving Positivity for Schubert Calculus

answered Sep 11, 2018 at 1:53

1 vote

Linear sections of $Gr(V,2)$

answered May 6, 2018 at 12:28

2 votes

$SO(6) \to SU(2) \times SU(2) \times U(1)$ branching rules

answered Feb 25, 2018 at 15:40

2 votes

Accepted

Is the action $T \times G \to G$ Poisson?

answered Jan 4, 2018 at 20:52

2 votes

Degeneration of coadjoint orbits

answered Jan 4, 2018 at 21:16

3 votes

The geometry of the solution set of a symmetric equation in four symmetric matrices

answered Sep 25, 2017 at 16:58

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