List questions from exact-sequence

Published on 06 Aug 2014 - 11:08

115

Views

Direct proof that $\mathbb{Z}/p\mathbb{Z}$ is not a flat $\mathbb{Z}/p^2\mathbb{Z}$-module.

Published on 08 Aug 2014 - 10:19

72

Views

Summation of series- substitution

Published on 09 Aug 2014 - 6:00

72

Views

$0\to L\to M\to N\to 0 $ is split if $0\to {\rm Hom}_R(D,L)\to {\rm Hom}_R(D,M)\to {\rm Hom}_R(D,N)\to 0$ is exact for any $D$.

Published on 13 Aug 2014 - 4:35

215

Views

Converse to Exactness of localization of modules

Published on 20 Aug 2014 - 0:23

124

Views

Is there a theory of "derived extensions"?

Published on 21 Aug 2014 - 21:14

94

Views

A question on short exact sequences.

Published on 27 Aug 2014 - 6:16

2.1k

Views

Relation between long exact sequences and Derived functors

Published on 25 Mar 2026 - 6:25

165

Views

Confusion in Serre's Local fields book

Published on 25 Mar 2026 - 11:01

210

Views

If the factor of a finitely generated module is free then submodule is also finitely generated

Published on 15 Sep 2014 - 13:56

127

Views

Example of a commutative square without a map between antidiagonal objects?

Published on 25 Sep 2014 - 3:46

395

Views

Tensor Product, Exterior Power and Splitting

Published on 30 Sep 2014 - 14:05

162

Views

Does the short exact sequence $0\rightarrow \mathbb{Z}_3 \rightarrow G \rightarrow \mathbb{Z}_2\oplus \mathbb{Z} \rightarrow 0$ always split?

Published on 02 Oct 2014 - 3:33

150

Views

a problem in exact sequence

Published on 02 Oct 2014 - 7:13

303

Views

Finite cyclic $\Bbb Z$-module and exact sequence

Published on 02 Oct 2014 - 10:42

List Question

Atiyah and Macdonald, Proposition 2.9

Direct proof that $\mathbb{Z}/p\mathbb{Z}$ is not a flat $\mathbb{Z}/p^2\mathbb{Z}$-module.

Summation of series- substitution

$0\to L\to M\to N\to 0 $ is split if $0\to {\rm Hom}_R(D,L)\to {\rm Hom}_R(D,M)\to {\rm Hom}_R(D,N)\to 0$ is exact for any $D$.

Converse to Exactness of localization of modules

Is there a theory of "derived extensions"?

A question on short exact sequences.

Relation between long exact sequences and Derived functors

Confusion in Serre's Local fields book

If the factor of a finitely generated module is free then submodule is also finitely generated

Example of a commutative square without a map between antidiagonal objects?

Tensor Product, Exterior Power and Splitting

Does the short exact sequence $0\rightarrow \mathbb{Z}_3 \rightarrow G \rightarrow \mathbb{Z}_2\oplus \mathbb{Z} \rightarrow 0$ always split?

a problem in exact sequence

Finite cyclic $\Bbb Z$-module and exact sequence

Trending Questions

Popular # Hahtags

Popular Questions