List questions from group-cohomology

Published on 19 Sep 2013 - 11:02

57

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What is the map $(\mathbb{C}P^\infty)^n\to G^n(\mathbb{C}^\infty)$ induced by the map $(S^1)^n\to U(n)$?

Published on 28 Sep 2013 - 22:22

1.9k

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The Zig Zag Lemma in Cohomology

Published on 30 Sep 2013 - 1:47

574

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Cohomology of finite groups with finite coefficients

Published on 05 Oct 2013 - 20:02

591

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Short exact sequences of non abelian groups

Published on 16 Oct 2013 - 15:55

1k

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The norm map in group cohomology is an isomorphism if $M$ is a projective $G$-module

Published on 17 Oct 2013 - 0:10

266

Views

Computing the action of $S_3$ on $H^n(\mathbb{Z}_3,\mathbb{Z})$

Published on 24 Oct 2013 - 1:29

273

Views

Extensions of $\mathbb{Z}_n$ by $\mathbb{Z}$

Published on 26 Oct 2013 - 6:01

162

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A group theory exercise in Brown's group cohomology book

Published on 07 Nov 2013 - 1:16

1k

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1-Cocycle of an Algebra

Published on 17 Nov 2013 - 4:01

435

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Finite generation of Tate cohomology groups

Published on 18 Nov 2013 - 2:07

978

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Why are projective modules cohomologically trivial?

Published on 18 Nov 2013 - 5:46

736

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Cohomological ($p$-)dimension of a pro-$p$ group

Published on 25 Mar 2026 - 9:31

430

Views

Corestriction map in lie algebra cohomology

Published on 23 Feb 2026 - 4:38

404

Views

Show that image of $res$ lies in $H^n(H,A)^{G/H}$

Published on 31 Dec 2013 - 6:54

List Question

Cohomology of groups.

What is the map $(\mathbb{C}P^\infty)^n\to G^n(\mathbb{C}^\infty)$ induced by the map $(S^1)^n\to U(n)$?

The Zig Zag Lemma in Cohomology

Cohomology of finite groups with finite coefficients

Short exact sequences of non abelian groups

The norm map in group cohomology is an isomorphism if $M$ is a projective $G$-module

Computing the action of $S_3$ on $H^n(\mathbb{Z}_3,\mathbb{Z})$

Extensions of $\mathbb{Z}_n$ by $\mathbb{Z}$

A group theory exercise in Brown's group cohomology book

1-Cocycle of an Algebra

Finite generation of Tate cohomology groups

Why are projective modules cohomologically trivial?

Cohomological ($p$-)dimension of a pro-$p$ group

Corestriction map in lie algebra cohomology

Show that image of $res$ lies in $H^n(H,A)^{G/H}$

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