List questions from group-cohomology

Published on 25 May 2022 - 22:06

99

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$\operatorname{Hom}_{\mathbb{Z}}(A,B)$ is a discrete $G$-module if $A$ finitely generated

Published on 26 Mar 2026 - 21:25

141

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First cohomology group and exact sequences

Published on 29 May 2022 - 13:22

65

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Künneth theorem for profinite cohomology.

Published on 26 Mar 2026 - 19:37

61

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Cohomological dimension of fundamental groups aspherical manifolds [reference request]

Published on 03 Jun 2022 - 15:46

44

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Exercise 6.6.5 Weibel Homological Algebra

Published on 07 Jun 2022 - 20:24

103

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A question regarding finite group cohomology

Published on 12 Jun 2022 - 3:13

24

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Direct sum decomposition of elliptic curve cohomology

Published on 02 Jul 2022 - 13:27

58

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When does group cohomology commute with colimits of groups?

Published on 05 Jul 2022 - 19:31

37

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Multiplications on the group cohomology

Published on 27 Mar 2026 - 19:15

51

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Confusion regarding finding the number of extensions of $\mathbb{Z}_{3}$ by $\mathbb{Z}_{4}$.

Published on 21 Jul 2022 - 22:59

259

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Normalization of group $2$-cocycles

Published on 28 Jul 2022 - 20:43

56

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$H^n(S,A)$ as a $G/S$ module given $S\lhd G$: non-unique $G/S$ actions?

Published on 27 Mar 2026 - 3:40

99

Views

Functoriality of group cohomology

Published on 21 Aug 2022 - 19:33

592

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Group cohomology of the product of cyclic groups

Published on 27 Mar 2026 - 3:43

List Question

Tate–Shafarevich group- Solutions in $\Bbb{R}$ and $\Bbb{Q}_p$ but not in $\Bbb{Q}$

$\operatorname{Hom}_{\mathbb{Z}}(A,B)$ is a discrete $G$-module if $A$ finitely generated

First cohomology group and exact sequences

Künneth theorem for profinite cohomology.

Cohomological dimension of fundamental groups aspherical manifolds [reference request]

Exercise 6.6.5 Weibel Homological Algebra

A question regarding finite group cohomology

Direct sum decomposition of elliptic curve cohomology

When does group cohomology commute with colimits of groups?

Multiplications on the group cohomology

Confusion regarding finding the number of extensions of $\mathbb{Z}_{3}$ by $\mathbb{Z}_{4}$.

Normalization of group $2$-cocycles

$H^n(S,A)$ as a $G/S$ module given $S\lhd G$: non-unique $G/S$ actions?

Functoriality of group cohomology

Group cohomology of the product of cyclic groups

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