Question

Connection between Chladni Plates and Projective Geometry?

score 56 · Answer 1 · 2026-05-11 00:40:18

56

Views

Connection between Chladni Plates and Projective Geometry?

Published on 11 May 2026 - 0:40

score 258 · Answer 2 · 2026-04-15 15:09:32

258

Views

$\text{Coker}(f),\text{Coker}(g)$ projective modules $\Rightarrow$ $\text{Coker}(gf)$ projective

Published on 15 Apr 2026 - 15:09

score 591 · Answer 3 · 2026-04-13 05:52:09

591

Views

A question about the quotient of two chain complexes of $R$-modules

Published on 13 Apr 2026 - 5:52

score 548 · Answer 4 · 2026-04-13 01:09:03

548

Views

Two short exact sequences with projective objects in the middle

Published on 13 Apr 2026 - 1:09

score 1.5k · Answer 5 · 2026-03-27 00:04:36

1.5k

Views

"Direct sums of injective modules over Noetherian ring is injective" and its analogue

Published on 27 Mar 2026 - 0:04

score 3.6k · Answer 6 · 2026-04-15 00:32:35

3.6k

Views

$P$ is projective . Show that $P$ is a direct summand of a free $R-$ module

Published on 15 Apr 2026 - 0:32

score 360 · Answer 7 · 2026-04-17 02:14:40

360

Views

Why is the $\mathbb Z$-module $\mathbb Q$ projective in category $\sigma[\mathbb Q]$?

Published on 17 Apr 2026 - 2:14

score 623 · Answer 8 · 2026-04-16 03:05:19

623

Views

Short exact sequence of modules over a Noetherian local ring of depth $1$.

Published on 16 Apr 2026 - 3:05

score 255 · Answer 9 · 2026-04-12 12:40:11

255

Views

Is $m$ a projective $A$-module?

Published on 12 Apr 2026 - 12:40

score 101 · Answer 10 · 2026-04-16 04:52:07

101

Views

generalized inverse in the theory of projective module

Published on 16 Apr 2026 - 4:52

score 1.9k · Answer 11 · 2026-03-26 22:13:42

1.9k

Views

example of inverse limit and direct limit

Published on 26 Mar 2026 - 22:13

score 110 · Answer 12 · 2026-04-14 02:08:25

110

Views

Does the nilpotent extension of a $1$-dimensional algebra always give a projective module?

Published on 14 Apr 2026 - 2:08

score 239 · Answer 13 · 2026-04-17 00:06:45

239

Views

If M and N are nonzero, finitely generated R-modules with M projective, then $M\otimes N$ is nonzero

Published on 17 Apr 2026 - 0:06

score 66 · Answer 14 · 2026-04-16 11:45:45

66

Views

If $A \times B$ is the direct product of two rings, must $A$ necessarily be a projective $A \times B$-module?

Published on 16 Apr 2026 - 11:45

score 31 · Answer 15 · 2026-03-26 22:18:05

31

Views

Prove that if $A$ is $R$-projective and $C$ is $S$-injective then $\operatorname{Hom}_R(A,C)$ is $S$-injective

Published on 26 Mar 2026 - 22:18

List Question

Connection between Chladni Plates and Projective Geometry?

$\text{Coker}(f),\text{Coker}(g)$ projective modules $\Rightarrow$ $\text{Coker}(gf)$ projective

A question about the quotient of two chain complexes of $R$-modules

Two short exact sequences with projective objects in the middle

"Direct sums of injective modules over Noetherian ring is injective" and its analogue

$P$ is projective . Show that $P$ is a direct summand of a free $R-$ module

Why is the $\mathbb Z$-module $\mathbb Q$ projective in category $\sigma[\mathbb Q]$?

Short exact sequence of modules over a Noetherian local ring of depth $1$.

Is $m$ a projective $A$-module?

generalized inverse in the theory of projective module

example of inverse limit and direct limit

Does the nilpotent extension of a $1$-dimensional algebra always give a projective module?

If M and N are nonzero, finitely generated R-modules with M projective, then $M\otimes N$ is nonzero

If $A \times B$ is the direct product of two rings, must $A$ necessarily be a projective $A \times B$-module?

Prove that if $A$ is $R$-projective and $C$ is $S$-injective then $\operatorname{Hom}_R(A,C)$ is $S$-injective

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