List questions from modules

Published on 01 Apr 2026 - 7:20

109

Views

A question about projective modules.

Published on 27 Mar 2026 - 15:16

461

Views

Matrices over PID

Published on 18 Sep 2014 - 5:40

193

Views

Proving a submodule is Noetherian

Published on 26 Mar 2026 - 0:58

725

Views

Why is axiom of choice needed? (Equivalent conditions for Noetherian)

Published on 18 Sep 2014 - 15:05

33

Views

$H^1(G,A)\rightarrow H^1(H,A)$ is onto

Published on 26 Mar 2026 - 12:47

97

Views

Composite function of $R$-module

Published on 26 Mar 2026 - 11:24

242

Views

Endomorphism rings of a $k$-algebra

Published on 28 Mar 2026 - 20:59

111

Views

Module over an associative ring with unity and axioms of projective geometry

Published on 26 Mar 2026 - 23:09

532

Views

Showing that an $(S,T)$-bimodule is a right $S^{op} \otimes_\mathbb{Z} T$-module

Published on 02 Apr 2026 - 13:16

685

Views

A simple example of a ring that is an $A$-module but not an $A$-algebra

Published on 23 Sep 2014 - 15:29

128

Views

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

Published on 26 Mar 2026 - 14:32

75

Views

Let $A\in\operatorname{M}_n(F)$ be a matrix, how to prove $\bigcap_{X\in C(A)}C(X)=F[A]=\frac{F[x]}{(m_A(x))}$.

Published on 26 Sep 2014 - 4:21

50

Views

The definition of $A'[\phi]$

Published on 26 Sep 2014 - 10:01

183

Views

Showing that the direct product does not satisfy the universal property of the direct sum

Published on 26 Sep 2014 - 14:44

List Question

Gorenstein ring and projective module

A question about projective modules.

Matrices over PID

Proving a submodule is Noetherian

Why is axiom of choice needed? (Equivalent conditions for Noetherian)

$H^1(G,A)\rightarrow H^1(H,A)$ is onto

Composite function of $R$-module

Endomorphism rings of a $k$-algebra

Module over an associative ring with unity and axioms of projective geometry

Showing that an $(S,T)$-bimodule is a right $S^{op} \otimes_\mathbb{Z} T$-module

A simple example of a ring that is an $A$-module but not an $A$-algebra

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

Let $A\in\operatorname{M}_n(F)$ be a matrix, how to prove $\bigcap_{X\in C(A)}C(X)=F[A]=\frac{F[x]}{(m_A(x))}$.

The definition of $A'[\phi]$

Showing that the direct product does not satisfy the universal property of the direct sum

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