List questions from homology-cohomology

Published on 09 Apr 2019 - 14:50

236

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Geometric meaning of r-cycles, r-boundaries and homology groups for a geometric simplicial complex.

Published on 25 Mar 2026 - 20:36

307

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de Rham cohomology of $U(2)$

Published on 26 Mar 2026 - 9:42

44

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Cohomology of spectrum from cohomology of levels.

Published on 10 Apr 2019 - 20:12

1.2k

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Homotopy equivalence of $\mathbb{R}^3 \setminus \{$lines$\}$

Published on 26 Mar 2026 - 9:42

110

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Generators of homological groups

Published on 11 Apr 2019 - 14:27

234

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Sheaf Cohomology vs Singular Cohomology in Locally contractable Space

Published on 26 Mar 2026 - 22:55

197

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group cohomology of abelianization

Published on 26 Mar 2026 - 1:34

149

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Mistake in computing boundary maps in $S^n$

Published on 25 Mar 2026 - 11:12

135

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Rank of a free Abelian subgroup gives a lower bound for vcd

Published on 26 Mar 2026 - 1:29

103

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Finite generation of homology of a group with cocompact group action

Published on 15 Apr 2019 - 13:17

87

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Compute the homology groups $H_∗(X, X−p)$ for points $p∈X$ where $X = S(\Bbb CP^2)$

Published on 25 Mar 2026 - 23:39

93

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A Homology calculation Question

Published on 16 Apr 2019 - 14:15

60

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How to prove the following homology group isomorphism?

Published on 25 Mar 2026 - 22:04

29

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A particular complex of integral group ring is exact: proof of Jacobson

Published on 01 Apr 2026 - 4:29

List Question

A question about tensoring and retaining exactness

Geometric meaning of r-cycles, r-boundaries and homology groups for a geometric simplicial complex.

de Rham cohomology of $U(2)$

Cohomology of spectrum from cohomology of levels.

Homotopy equivalence of $\mathbb{R}^3 \setminus \{$lines$\}$

Generators of homological groups

Sheaf Cohomology vs Singular Cohomology in Locally contractable Space

group cohomology of abelianization

Mistake in computing boundary maps in $S^n$

Rank of a free Abelian subgroup gives a lower bound for vcd

Finite generation of homology of a group with cocompact group action

Compute the homology groups $H_∗(X, X−p)$ for points $p∈X$ where $X = S(\Bbb CP^2)$

A Homology calculation Question

How to prove the following homology group isomorphism?

A particular complex of integral group ring is exact: proof of Jacobson

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