List questions from projective-module

Published on 26 Dec 2013 - 7:03

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Why $\prod_{i\in I} \Bbb Z$ is not a projective $\Bbb Z$-module?

Published on 28 Dec 2013 - 6:28

1.8k

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Finitely generated projective modules are isomorphic to their double dual.

Published on 28 Dec 2013 - 7:38

765

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projective dimension and localization

Published on 07 Jan 2014 - 19:24

216

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An invariant submodule of a projective module

Published on 26 Mar 2026 - 12:33

119

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Why is $M=\{(x_i)\in R^n: \sum r_ix_i=0\}$ a projective module?

Published on 21 Jan 2014 - 2:27

149

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Question on Nakayama?

Published on 22 Jan 2014 - 1:30

221

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A few questions about a specific ring

Published on 24 Jan 2014 - 23:31

241

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Is ${\bf Z}_m$ a projective ${\bf Z}$-module?

Published on 26 Jan 2014 - 12:53

143

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Clarification about some proof of Projectivity

Published on 26 Jan 2014 - 18:11

1k

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Triangular Matrices and Simple Modules

Published on 02 Feb 2014 - 1:19

711

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Annihilator of a projective module is always a projective idempotent ideal?

Published on 03 Feb 2014 - 22:36

10.1k

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Projective module over a PID is free?

Published on 10 Feb 2014 - 22:56

65

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Prove some statements about projective modules

Published on 19 Feb 2014 - 1:17

181

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Requirements on ring for injective-projectiveness

Published on 27 Mar 2026 - 10:08

List Question

Prove that $M$ is a free module if and only if $M$ is a projective module over $PID$.

Why $\prod_{i\in I} \Bbb Z$ is not a projective $\Bbb Z$-module?

Finitely generated projective modules are isomorphic to their double dual.

projective dimension and localization

An invariant submodule of a projective module

Why is $M=\{(x_i)\in R^n: \sum r_ix_i=0\}$ a projective module?

Question on Nakayama?

A few questions about a specific ring

Is ${\bf Z}_m$ a projective ${\bf Z}$-module?

Clarification about some proof of Projectivity

Triangular Matrices and Simple Modules

Annihilator of a projective module is always a projective idempotent ideal?

Projective module over a PID is free?

Prove some statements about projective modules

Requirements on ring for injective-projectiveness

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