List questions from group-cohomology

Published on 13 Jun 2019 - 17:46

28

Views

Show that $\dim H^1(\Gamma(11)) = 3$

Published on 14 Jun 2019 - 16:21

455

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A condition for normalized 2-cocycles from the existence of the inverse element in a group extension

Published on 20 Jun 2019 - 6:22

594

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Why does cocycle condition imply a group?

Published on 21 Jun 2019 - 4:53

499

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Cocycles and group extensions

Published on 25 Mar 2026 - 6:00

98

Views

What's the usual $G$- action on group extension?

Published on 29 Jun 2019 - 8:33

14

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The value of $H^2(U(N), U(1))$

Published on 04 Jul 2019 - 19:27

314

Views

pullback of quotient map: injective on group cohomology?

Published on 23 Feb 2026 - 4:49

102

Views

Etale Cohomology vs Group Cohomology

Published on 25 Mar 2026 - 22:26

175

Views

Question about Shapiro Lemma

Published on 24 Jul 2019 - 9:31

876

Views

Definition of crossed homomorphisms

Published on 26 Jul 2019 - 23:03

103

Views

Schur multiplier of $C_{2^n-1} \rtimes C_n$

Published on 29 Jul 2019 - 15:39

37

Views

Naive questions on 1-cocycles of loally compact groups.

Published on 25 Mar 2026 - 12:54

421

Views

Homology of dihedral groups of even degree

Published on 01 Aug 2019 - 19:33

106

Views

Is choice needed to prove that there always exist a deformation in the non-obstructed case?

Published on 25 Mar 2026 - 3:07

List Question

Dimension of homology of groups

Show that $\dim H^1(\Gamma(11)) = 3$

A condition for normalized 2-cocycles from the existence of the inverse element in a group extension

Why does cocycle condition imply a group?

Cocycles and group extensions

What's the usual $G$- action on group extension?

The value of $H^2(U(N), U(1))$

pullback of quotient map: injective on group cohomology?

Etale Cohomology vs Group Cohomology

Question about Shapiro Lemma

Definition of crossed homomorphisms

Schur multiplier of $C_{2^n-1} \rtimes C_n$

Naive questions on 1-cocycles of loally compact groups.

Homology of dihedral groups of even degree

Is choice needed to prove that there always exist a deformation in the non-obstructed case?

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