List questions from exact-sequence

Published on 11 Apr 2026 - 4:11

388

Views

Miscellaneous Questions involving Tensor Products, Exact Sequences, and Algebras

Published on 10 May 2026 - 11:20

177

Views

Proving a diagram chase result from standard lemmas

Published on 05 May 2026 - 4:09

96

Views

Show that $a+b+c+d$ is even in the following exact sequence

Published on 16 Apr 2026 - 4:08

697

Views

How to write long exact sequence as short exact sequence of complex?

Published on 14 Apr 2026 - 12:52

197

Views

If sequence of vector spaces is exact then the sequence of duals is also exact

Published on 17 Apr 2026 - 12:52

336

Views

Why $f'$ is an isomorphism if the rightmost square is a pullback?

Published on 07 May 2026 - 7:21

423

Views

Why the rightmost square is a pullback?

Published on 07 May 2026 - 19:04

315

Views

Exact sequences in category theory

Published on 15 Apr 2026 - 9:58

186

Views

Finitely generated projective module $M$ over integral domain $R$ such that $M \oplus R \cong R^2$ and $M\otimes N \cong R$ for some module $N$

Published on 29 Apr 2026 - 12:42

268

Views

$(A/\mathfrak{a}) \otimes_A M \simeq M / \mathfrak{a}M$ by tensoring the canonical exact sequence.

Published on 17 Apr 2026 - 11:03

138

Views

abelian group, direct summand

Published on 02 May 2026 - 11:50

103

Views

Question concerning exact sequences of $R$-modules

Published on 16 Apr 2026 - 2:57

91

Views

Exactness of the functor $(\quad)^G$ for $G=k^\times$

Published on 10 May 2026 - 9:34

344

Views

Natural exact sequence associated to a group/module filtration

Published on 11 Apr 2026 - 23:40

List Question

Proof that a short exact sequence does not split

Miscellaneous Questions involving Tensor Products, Exact Sequences, and Algebras

Proving a diagram chase result from standard lemmas

Show that $a+b+c+d$ is even in the following exact sequence

How to write long exact sequence as short exact sequence of complex?

If sequence of vector spaces is exact then the sequence of duals is also exact

Why $f'$ is an isomorphism if the rightmost square is a pullback?

Why the rightmost square is a pullback?

Exact sequences in category theory

Finitely generated projective module $M$ over integral domain $R$ such that $M \oplus R \cong R^2$ and $M\otimes N \cong R$ for some module $N$

$(A/\mathfrak{a}) \otimes_A M \simeq M / \mathfrak{a}M$ by tensoring the canonical exact sequence.

abelian group, direct summand

Question concerning exact sequences of $R$-modules

Exactness of the functor $(\quad)^G$ for $G=k^\times$

Natural exact sequence associated to a group/module filtration

Trending Questions

Popular # Hahtags

Popular Questions