Question

Counter-example: If $U \subseteq X$ is open and we have a S.E.S of Abelian sheaves, the corresponding S.E.S of rings/modules may not be exact

score 92 · Answer 1 · 2026-03-25 17:42:08

Counter-example: If $U \subseteq X$ is open and we have a S.E.S of Abelian sheaves, the corresponding S.E.S of rings/modules may not be exact

score 202 · Answer 2 · 2026-03-27 04:40:00

202

Views

Local ring of a smooth subvariety.

Published on 27 Mar 2026 - 4:40

score 279 · Answer 3 · 2026-03-25 09:31:24

279

Views

Pullback of Kähler Differentials

Published on 25 Mar 2026 - 9:31

score 97 · Answer 4 · 2018-07-06 14:48:40

97

Views

Gluing cycles on the fibres of a family

Published on 06 Jul 2018 - 14:48

score 132 · Answer 5 · 2026-03-24 23:44:38

132

Views

Points of elliptic curves over different fields

Published on 24 Mar 2026 - 23:44

score 528 · Answer 6 · 2026-03-25 07:45:53

528

Views

Topology of "degenerate spectrum submanifold" in the space of hermitian matrices

Published on 25 Mar 2026 - 7:45

score 401 · Answer 7 · 2026-03-25 11:54:07

401

Views

Definition of “degree zero” in the localization of a graded ring

Published on 25 Mar 2026 - 11:54

score 60 · Answer 8 · 2026-04-01 00:25:48

Given $x\in R$, $R$ a commutative ring, what is the difference between $R/(x)$ and $coker(R\rightarrow^{*x} R)$ and how do I visualize the latter?

score 340 · Answer 9 · 2026-03-25 06:04:02

340

Views

Is it always possible to project a smooth projective plane curve to $\mathbb{P}^1$?

Published on 25 Mar 2026 - 6:04

score 142 · Answer 10 · 2026-03-25 18:47:19

142

Views

Morphism from product of schemes

Published on 25 Mar 2026 - 18:47

score 115 · Answer 11 · 2026-03-28 06:21:04

115

Views

Why does the following construction describe the Serre functor?

Published on 28 Mar 2026 - 6:21

score 217 · Answer 12 · 2026-03-25 18:48:30

217

Views

Proposition II.3.2 of Hartshorne and quasi-compactness

Published on 25 Mar 2026 - 18:48

score 239 · Answer 13 · 2026-03-26 09:48:02

239

Views

Castelnuovo contraction for analytic surfaces

Published on 26 Mar 2026 - 9:48

score 633 · Answer 14 · 2026-03-26 06:27:47

633

Views

Pencil of Curves on a Surface

Published on 26 Mar 2026 - 6:27

score 485 · Answer 15 · 2026-03-25 18:50:15

485

Views

Morphism between thick fibers of schemes extends to a neighbourhood

Published on 25 Mar 2026 - 18:50

List Question

Counter-example: If $U \subseteq X$ is open and we have a S.E.S of Abelian sheaves, the corresponding S.E.S of rings/modules may not be exact

Local ring of a smooth subvariety.

Pullback of Kähler Differentials

Gluing cycles on the fibres of a family

Points of elliptic curves over different fields

Topology of "degenerate spectrum submanifold" in the space of hermitian matrices

Definition of “degree zero” in the localization of a graded ring

Given $x\in R$, $R$ a commutative ring, what is the difference between $R/(x)$ and $coker(R\rightarrow^{*x} R)$ and how do I visualize the latter?

Is it always possible to project a smooth projective plane curve to $\mathbb{P}^1$?

Morphism from product of schemes

Why does the following construction describe the Serre functor?

Proposition II.3.2 of Hartshorne and quasi-compactness

Castelnuovo contraction for analytic surfaces

Pencil of Curves on a Surface

Morphism between thick fibers of schemes extends to a neighbourhood

Trending Questions

Popular # Hahtags

Popular Questions