User Peter McNamara

47 votes

8 answers

12k views

How should one think about pushforward in cohomology?

asked May 12, 2011 at 4:57

31 votes

1 answer

4k views

Which is the correct version of a quantum group at a root of unity?

asked Dec 29, 2009 at 13:37

29 votes

5 answers

3k views

Topologists loops versus algebraists loops

asked Feb 26, 2010 at 2:55

17 votes

4 answers

2k views

Folding by Automorphisms

asked Nov 3, 2009 at 2:11

14 votes

2 answers

4k views

Affine Weyl groups as Coxeter groups

asked Dec 27, 2009 at 23:29

14 votes

2 answers

1k views

Where does the canonical basis differ from the KLR basis?

asked Mar 23, 2012 at 0:20

13 votes

1 answer

724 views

Best approximation to the Weyl group as a subgroup of a reductive group.

asked Oct 14, 2010 at 1:34

13 votes

1 answer

730 views

Why is the A6 preprojective algebra of wild representation type?

asked Apr 7, 2015 at 16:04

12 votes

1 answer

314 views

Passing from T-equivariant to G-equivariant cohomology

asked Apr 13, 2016 at 1:13

12 votes

5 answers

814 views

A divisibility of q-binomial coefficients combinatorially

asked Oct 23, 2018 at 10:39

11 votes

1 answer

286 views

Is there a geometric interpretation of skew Schur functions?

asked Nov 27, 2017 at 18:34

11 votes

1 answer

1k views

Do Berkovich homogenous spaces exist?

asked May 6, 2010 at 2:38

10 votes

0 answers

2k views

Why is the Nil-Hecke Algebra appearing?

asked Dec 14, 2010 at 7:43

10 votes

3 answers

3k views

The localisation long exact sequence in K-theory over an arbitrary base

asked Nov 14, 2009 at 21:40

10 votes

1 answer

2k views

On unramified p-adic groups

asked Oct 15, 2014 at 22:39

9 votes

5 answers

3k views

Solutions of the Quantum Yang-Baxter Equation

asked Nov 11, 2009 at 20:51

8 votes

3 answers

1k views

Gerbes for a cyclic group. (or maybe G_m too)

asked Nov 26, 2009 at 15:23

7 votes

3 answers

2k views

Iwasawa and Cartan Decompositions.

asked Oct 24, 2009 at 13:48

7 votes

0 answers

519 views

Where can I find tables of dual canonical basis vectors?

asked Jun 30, 2011 at 2:41

7 votes

2 answers

661 views

Varieties with polynomial point count and no odd cohomology

asked May 23, 2014 at 6:33

6 votes

2 answers

1k views

Explicit Direct Summands in the Decomposition Theorem

asked Oct 18, 2009 at 15:17

5 votes

3 answers

662 views

Deequivariantisation of indecomposable sheaves

asked Nov 21, 2021 at 12:16

5 votes

1 answer

352 views

What is the circle-equivariant cohomology of the real projective plane

asked Dec 4, 2022 at 7:35

4 votes

1 answer

277 views

Vertex embeddings of quantum groups via quivers

asked Jun 27, 2012 at 7:15

3 votes

1 answer

252 views

Over which schemes can there exist non-trivial G_a bundles?

asked Oct 28, 2009 at 3:52

1 vote

1 answer

801 views

Comparing Iwahori Decompositions

asked Dec 14, 2009 at 3:55

1 vote

0 answers

219 views

How do I check if a sequence of R-modules is exact?

asked Jul 10, 2015 at 6:58

Stack Exchange Network

27 Questions

How should one think about pushforward in cohomology?

Which is the correct version of a quantum group at a root of unity?

Topologists loops versus algebraists loops

Folding by Automorphisms

Affine Weyl groups as Coxeter groups

Where does the canonical basis differ from the KLR basis?

Best approximation to the Weyl group as a subgroup of a reductive group.

Why is the A6 preprojective algebra of wild representation type?

Passing from T-equivariant to G-equivariant cohomology

A divisibility of q-binomial coefficients combinatorially

Is there a geometric interpretation of skew Schur functions?

Do Berkovich homogenous spaces exist?

Why is the Nil-Hecke Algebra appearing?

The localisation long exact sequence in K-theory over an arbitrary base

On unramified p-adic groups

Solutions of the Quantum Yang-Baxter Equation

Gerbes for a cyclic group. (or maybe G_m too)

Iwasawa and Cartan Decompositions.

Where can I find tables of dual canonical basis vectors?

Varieties with polynomial point count and no odd cohomology

Explicit Direct Summands in the Decomposition Theorem

Deequivariantisation of indecomposable sheaves

What is the circle-equivariant cohomology of the real projective plane

Vertex embeddings of quantum groups via quivers

Over which schemes can there exist non-trivial G_a bundles?

Comparing Iwahori Decompositions

How do I check if a sequence of R-modules is exact?