List questions from group-cohomology

Published on 03 Sep 2018 - 7:59

41

Views

$\Omega_4^{SO}(K(\mathbb{Z}_2,2))$ v.s. $H^4(K(\mathbb{Z}_2,2),U(1))$: Cocycle form

Published on 25 Mar 2026 - 11:16

132

Views

Group actions on spectral sequences of group cohomology

Published on 25 Mar 2026 - 12:42

89

Views

Cup Products and Group Extensions

Published on 25 Mar 2026 - 2:59

108

Views

Functoriality of Lyndon-Hochschild-Serre spectral sequences in coefficients.

Published on 25 Mar 2026 - 3:04

1k

Views

Long exact sequence of cohomology group "without" Snake lemma

Published on 17 Sep 2018 - 1:03

138

Views

The extension of a connected, simply-connected Lie group by $\mathbb{Z}$ is trivial.

Published on 25 Mar 2026 - 6:06

111

Views

Could we define injective modules or projective modules for topological modules?

Published on 17 Mar 2026 - 10:59

45

Views

Comparing the cohomology rings of two central extensions

Published on 28 Sep 2018 - 15:53

187

Views

Neukirch ANT - proving reciprocity map is multiplicative

Published on 07 Oct 2018 - 8:38

92

Views

Stiefel Whitney classes on the simplex or the simplicial complex

Published on 25 Mar 2026 - 12:46

149

Views

Dualizing module and finiteness hypothesis

Published on 25 Mar 2026 - 13:01

319

Views

What's the ring structure of $H^*(C_2,\mathbb{Z})$ with a nontrivial group action?

Published on 11 Oct 2018 - 18:56

136

Views

Isomorphic extensions of $\mathbb Z_3$ by $\mathbb Z_3 \times \mathbb Z_3$ which are not equivalent

Published on 25 Mar 2026 - 3:03

110

Views

Find isomorphic extensions of $\mathbb Z_3$ by $\mathbb Z_3 \times \mathbb Z_3$ which are not equivalent

Published on 25 Mar 2026 - 3:02

List Question

Motivation for cochains, cocycles and coboundaries

$\Omega_4^{SO}(K(\mathbb{Z}_2,2))$ v.s. $H^4(K(\mathbb{Z}_2,2),U(1))$: Cocycle form

Group actions on spectral sequences of group cohomology

Cup Products and Group Extensions

Functoriality of Lyndon-Hochschild-Serre spectral sequences in coefficients.

Long exact sequence of cohomology group "without" Snake lemma

The extension of a connected, simply-connected Lie group by $\mathbb{Z}$ is trivial.

Could we define injective modules or projective modules for topological modules?

Comparing the cohomology rings of two central extensions

Neukirch ANT - proving reciprocity map is multiplicative

Stiefel Whitney classes on the simplex or the simplicial complex

Dualizing module and finiteness hypothesis

What's the ring structure of $H^*(C_2,\mathbb{Z})$ with a nontrivial group action?

Isomorphic extensions of $\mathbb Z_3$ by $\mathbb Z_3 \times \mathbb Z_3$ which are not equivalent

Find isomorphic extensions of $\mathbb Z_3$ by $\mathbb Z_3 \times \mathbb Z_3$ which are not equivalent

Trending Questions

Popular # Hahtags

Popular Questions