List questions from homological-algebra

Published on 28 Jul 2019 - 17:13

242

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A projective resolution for $R = k[x,y,z]$?

Published on 29 Jul 2019 - 9:17

338

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Condition for Functor to be equivalence of categories

Published on 29 Jul 2019 - 18:16

422

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Homology of dihedral groups of even degree

Published on 26 Mar 2026 - 4:53

1.1k

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Definitions of split injection and split surjection

Published on 04 Aug 2019 - 23:51

222

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Definition of right balanced functor

Published on 05 Aug 2019 - 23:35

166

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What is the derived functors of multivariable functor?

Published on 06 Aug 2019 - 0:05

480

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Any two minimal free resolutions of an R-module are isomorphic

Published on 06 Aug 2019 - 23:12

154

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What is wrong with my reasoning here?

Published on 07 Aug 2019 - 21:33

121

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Showing there is a natural map between coim$(f)$ and im$(f)$ in an abelian category

Published on 08 Aug 2019 - 10:18

38

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Exact sequence extracted from projective resolution

Published on 09 Aug 2019 - 12:19

417

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Exercise 1.1.2, Weibel

Published on 25 Mar 2026 - 18:04

118

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Why did we study “defect” in the late 1800s?

Published on 10 Aug 2019 - 18:39

475

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Weibel Exercise 3.3.1 how to prove $\operatorname{Ext}_Z^1(Z[1/p],Z)\cong\hat{Z}_p/Z$ without writing down the map?

Published on 10 Aug 2019 - 20:30

91

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What does it mean to say a functor is represented by $(X,a)$?

Published on 11 Aug 2019 - 14:25

List Question

Two definitions of an abelian category

A projective resolution for $R = k[x,y,z]$?

Condition for Functor to be equivalence of categories

Homology of dihedral groups of even degree

Definitions of split injection and split surjection

Definition of right balanced functor

What is the derived functors of multivariable functor?

Any two minimal free resolutions of an R-module are isomorphic

What is wrong with my reasoning here?

Showing there is a natural map between coim$(f)$ and im$(f)$ in an abelian category

Exact sequence extracted from projective resolution

Exercise 1.1.2, Weibel

Why did we study “defect” in the late 1800s?

Weibel Exercise 3.3.1 how to prove $\operatorname{Ext}_Z^1(Z[1/p],Z)\cong\hat{Z}_p/Z$ without writing down the map?

What does it mean to say a functor is represented by $(X,a)$?

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