Question

Computing the number of projective-injective modules

score 54 · Answer 1 · 2026-04-16 05:50:32

54

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Computing the number of projective-injective modules

Published on 16 Apr 2026 - 5:50

score 29 · Answer 2 · 2026-04-12 00:12:58

29

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Condition for a module to be finitely generated projective

Published on 12 Apr 2026 - 0:12

score 324 · Answer 3 · 2026-04-12 16:49:26

324

Views

Trivial Group Representation is Projective implies Semisimple

Published on 12 Apr 2026 - 16:49

score 2.3k · Answer 4 · 2026-05-11 07:53:53

2.3k

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K Theory: Book Recommendations

Published on 11 May 2026 - 7:53

score 1.9k · Answer 5 · 2026-04-14 07:17:29

1.9k

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Why does the short exact sequence for projective module split?

Published on 14 Apr 2026 - 7:17

score 179 · Answer 6 · 2026-04-16 05:27:00

179

Views

Proof that $\text{Hom}(E_1,F_1)\otimes\text{Hom}(E_2,F_2)$ and $\text{Hom}(E_1\otimes E_2,F_1\otimes F_2)$ are isomorphic

Published on 16 Apr 2026 - 5:27

score 320 · Answer 7 · 2026-04-15 20:24:19

320

Views

Two equivalent definitions of projective module $P$ (one involving right inverse), how do we make sense of these "replacements" in the proof?

Published on 15 Apr 2026 - 20:24

score 91 · Answer 8 · 2026-04-12 23:43:16

91

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Is a bounded complex of projective $R$-modules of finite type quasi-isomorphic to a bounded complex of free $R$-modules of finite type?

Published on 12 Apr 2026 - 23:43

score 124 · Answer 9 · 2026-03-25 20:13:49

124

Views

An Exercise on projective covers and injective envelopes of simple modules over an Artin algebra

Published on 25 Mar 2026 - 20:13

score 114 · Answer 10 · 2026-05-11 08:42:45

114

Views

Question on injective envelopes

Published on 11 May 2026 - 8:42

score 66 · Answer 11 · 2026-04-16 05:45:09

66

Views

Finiteness and extension of a ring of scalars

Published on 16 Apr 2026 - 5:45

score 736 · Answer 12 · 2026-04-15 07:49:04

736

Views

Is the projective dimension of modules with finite projective dimension bounded?

Published on 15 Apr 2026 - 7:49

score 48 · Answer 13 · 2026-04-14 13:58:21

48

Views

Confusion in the equivalent statement of projective module

Published on 14 Apr 2026 - 13:58

score 361 · Answer 14 · 2026-04-14 07:41:16

361

Views

If M is a finitely generated projective module then the Homomorphism ring is also projective

Published on 14 Apr 2026 - 7:41

score 317 · Answer 15 · 2026-04-15 21:58:11

317

Views

Property of transpose Tr in category of modules (Auslander-Reiten theory)

Published on 15 Apr 2026 - 21:58

List Question

Computing the number of projective-injective modules

Condition for a module to be finitely generated projective

Trivial Group Representation is Projective implies Semisimple

K Theory: Book Recommendations

Why does the short exact sequence for projective module split?

Proof that $\text{Hom}(E_1,F_1)\otimes\text{Hom}(E_2,F_2)$ and $\text{Hom}(E_1\otimes E_2,F_1\otimes F_2)$ are isomorphic

Two equivalent definitions of projective module $P$ (one involving right inverse), how do we make sense of these "replacements" in the proof?

Is a bounded complex of projective $R$-modules of finite type quasi-isomorphic to a bounded complex of free $R$-modules of finite type?

An Exercise on projective covers and injective envelopes of simple modules over an Artin algebra

Question on injective envelopes

Finiteness and extension of a ring of scalars

Is the projective dimension of modules with finite projective dimension bounded?

Confusion in the equivalent statement of projective module

If M is a finitely generated projective module then the Homomorphism ring is also projective

Property of transpose Tr in category of modules (Auslander-Reiten theory)

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