User jdc

48 votes

0 answers

17k views

What is the current understanding regarding complex structures on the 6-sphere?

asked Feb 28, 2017 at 3:20

31 votes

0 answers

865 views

The central insight in the proof of the existence of a class of Kervaire invariant one in dimension 126

asked Jul 19, 2021 at 23:48

20 votes

1 answer

1k views

Torsion in the Atiyah–Hirzebruch spectral sequence of a classifying space

asked Apr 6, 2017 at 21:40

9 votes

0 answers

261 views

Reference request: $H^* X$-module structure on the Mayer–Vietoris coboundary

asked Jun 10, 2017 at 20:51

9 votes

1 answer

708 views

Citation: earliest incidence of the Borel localization theorem

asked Jan 30, 2015 at 4:11

8 votes

1 answer

332 views

Doesn't completion of a representation ring preserve its indecomposables?

asked May 2, 2017 at 0:05

8 votes

2 answers

629 views

(Co)homology theories not satisfying the wedge axiom

asked May 26, 2017 at 20:26

8 votes

1 answer

362 views

Reference request: Origins of differential homological algebra

asked Nov 6, 2020 at 2:02

8 votes

1 answer

235 views

Simple identity on Lie algebras in a note of Koszul

asked Jun 4, 2017 at 23:50

8 votes

1 answer

298 views

Equivariant bundles invisible in K-theory and Borel cohomology

asked May 17, 2018 at 1:58

7 votes

1 answer

535 views

Naive equivariant transfer

asked Jul 7, 2017 at 19:13

7 votes

2 answers

508 views

Is this characterization of (-1)-eigenspaces of the Weyl group of $E_6$ known?

asked Apr 19, 2015 at 2:29

7 votes

0 answers

253 views

What is the status of this fifty-year-old conjecture of Kostant?

asked Oct 31, 2015 at 18:20

5 votes

1 answer

145 views

Example request: seriously deficient homogeneous spaces

asked Feb 17, 2016 at 2:37

5 votes

0 answers

368 views

Reference request: a Künneth spectral sequence map from equivariant K-theory to cohomology

asked May 23, 2016 at 6:21

5 votes

0 answers

198 views

Example request: equivariant formality versus formality for homogeneous spaces

asked Oct 19, 2015 at 4:29

5 votes

3 answers

769 views

Extension of scalars and support of a non-finitely generated module

asked Dec 26, 2010 at 8:27

5 votes

2 answers

1k views

Is a Lie group equivariantly formal under conjugation by a maximal torus?

asked May 20, 2013 at 20:31

5 votes

1 answer

284 views

If $N_G(S)/Z_G(S)$ is a reflection group, is it a Weyl group?

asked Sep 23, 2016 at 23:16

5 votes

1 answer

626 views

Is a $G$-cell complex always a $G$-CW complex?

asked Jan 25, 2019 at 20:43

4 votes

0 answers

138 views

Infinite-dimensional Chevalley–Shephard–Todd theorem

asked Jun 2, 2017 at 21:31

4 votes

0 answers

94 views

A dimension condition on the cohomology of a homogeneous space

asked Feb 17, 2016 at 2:22

3 votes

0 answers

60 views

Reference request: table of representation rings and relations

asked Aug 29, 2016 at 1:01

3 votes

1 answer

311 views

Show the Cartan 3-form transgresses to the Killing form in the Weil algebra

asked Jun 5, 2017 at 2:09

2 votes

0 answers

181 views

Locus classicus for the Chevalley restriction theorem

asked Jun 2, 2017 at 20:04

2 votes

0 answers

183 views

Does a surjection between polynomial rings lose one Krull dimension per generator quotiented?

asked Mar 22, 2019 at 14:02

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26 Questions

What is the current understanding regarding complex structures on the 6-sphere?

The central insight in the proof of the existence of a class of Kervaire invariant one in dimension 126

Torsion in the Atiyah–Hirzebruch spectral sequence of a classifying space

Reference request: $H^* X$-module structure on the Mayer–Vietoris coboundary

Citation: earliest incidence of the Borel localization theorem

Doesn't completion of a representation ring preserve its indecomposables?

(Co)homology theories not satisfying the wedge axiom

Reference request: Origins of differential homological algebra

Simple identity on Lie algebras in a note of Koszul

Equivariant bundles invisible in K-theory and Borel cohomology

Naive equivariant transfer

Is this characterization of (-1)-eigenspaces of the Weyl group of $E_6$ known?

What is the status of this fifty-year-old conjecture of Kostant?

Example request: seriously deficient homogeneous spaces

Reference request: a Künneth spectral sequence map from equivariant K-theory to cohomology

Example request: equivariant formality versus formality for homogeneous spaces

Extension of scalars and support of a non-finitely generated module

Is a Lie group equivariantly formal under conjugation by a maximal torus?

If $N_G(S)/Z_G(S)$ is a reflection group, is it a Weyl group?

Is a $G$-cell complex always a $G$-CW complex?

Infinite-dimensional Chevalley–Shephard–Todd theorem

A dimension condition on the cohomology of a homogeneous space

Reference request: table of representation rings and relations

Show the Cartan 3-form transgresses to the Killing form in the Weil algebra

Locus classicus for the Chevalley restriction theorem

Does a surjection between polynomial rings lose one Krull dimension per generator quotiented?