List questions from group-cohomology

Published on 25 Mar 2026 - 12:13

41

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Restriction vs. multiplication by $n$ in Tate cohomology

Published on 27 Mar 2026 - 19:15

88

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homology of finitely generated group

Published on 26 Mar 2026 - 12:36

82

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Why are the maps we get from the cup product linear?

Published on 30 Mar 2026 - 9:48

77

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Is $\mathbb{Q}$ an injective $\mathbb{Z}[G]$-module

Published on 27 Mar 2026 - 19:08

91

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In Romyar Sharifi's Group Cohomology Notes, why is it true that $H^0(G,A) = A^G$ the group of $G$-invariants of the $G$-module $A$?

Published on 23 Oct 2022 - 23:07

51

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Proving Ind functor preserves injectives from tensor functor

Published on 29 Mar 2026 - 19:45

56

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Why isn't the crossed product algebra $(K(\sqrt{a}), Gal(K(\sqrt{a})/K, k)$ independent of a?

Published on 12 Nov 2022 - 20:47

180

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Which finite simple groups have trivial Schur multiplier?

Published on 29 Mar 2026 - 3:12

28

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Understanding Hopf's Formula for continuous cohomology of profinite groups.

Published on 26 Mar 2026 - 21:25

66

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About relative Group Homology long exact sequence

Published on 27 Mar 2026 - 7:13

55

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Recovering original definition of group cohomology from Ext definition

Published on 26 Mar 2026 - 21:09

133

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Bott Tu, Chapter 14, Filtered complexes

Published on 27 Mar 2026 - 5:34

127

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Action on group cohomology

Published on 02 Dec 2022 - 6:31

60

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Motivation for long exact sequence of group cohomology

Published on 09 Dec 2022 - 21:00

List Question

Brumer theorem about ideal class group

Restriction vs. multiplication by $n$ in Tate cohomology

homology of finitely generated group

Why are the maps we get from the cup product linear?

Is $\mathbb{Q}$ an injective $\mathbb{Z}[G]$-module

In Romyar Sharifi's Group Cohomology Notes, why is it true that $H^0(G,A) = A^G$ the group of $G$-invariants of the $G$-module $A$?

Proving Ind functor preserves injectives from tensor functor

Why isn't the crossed product algebra $(K(\sqrt{a}), Gal(K(\sqrt{a})/K, k)$ independent of a?

Which finite simple groups have trivial Schur multiplier?

Understanding Hopf's Formula for continuous cohomology of profinite groups.

About relative Group Homology long exact sequence

Recovering original definition of group cohomology from Ext definition

Bott Tu, Chapter 14, Filtered complexes

Action on group cohomology

Motivation for long exact sequence of group cohomology

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