Question

restriction maps of the constant presheaf are necessarily identity

score 57 · Answer 1 · 2020-01-26 17:03:25

57

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restriction maps of the constant presheaf are necessarily identity

Published on 26 Jan 2020 - 17:03

score 68 · Answer 2 · 2026-02-23 03:25:52

68

Views

Computing $\mathscr O_X (X − \{x\})$ for $X$ an affine scheme

Published on 23 Feb 2026 - 3:25

score 241 · Answer 3 · 2020-01-29 21:15:02

241

Views

Where can I learn about Sheaves as an indepdendent topic?

Published on 29 Jan 2020 - 21:15

score 303 · Answer 4 · 2020-01-30 00:14:05

303

Views

Can the fibre product of schemes be described as a colimit

Published on 30 Jan 2020 - 0:14

score 136 · Answer 5 · 2026-03-25 11:13:25

136

Views

Just a clarification about a notation used in a question (does $I^n$ mean $I\otimes\cdots\otimes I$?)

Published on 25 Mar 2026 - 11:13

score 113 · Answer 6 · 2020-02-03 01:13:57

113

Views

vector bundles $\mathcal F, \mathcal G$ such that $\mathcal Hom (\mathcal F, \mathcal G) $ is a direct sum of copies of $\mathcal O_X$

Published on 03 Feb 2020 - 1:13

score 104 · Answer 7 · 2026-03-25 12:54:52

104

Views

Blow up and Castelnuovo-Mumford Regularity

Published on 25 Mar 2026 - 12:54

score 51 · Answer 8 · 2026-03-28 10:16:08

51

Views

Factoring a presheaf through a sheaf using the etalé space

Published on 28 Mar 2026 - 10:16

score 88 · Answer 9 · 2026-03-21 11:50:51

88

Views

Divisorial sheaves as sheaves on $\operatorname{Pic}(X)\times X$

Published on 21 Mar 2026 - 11:50

score 139 · Answer 10 · 2026-03-25 16:02:59

139

Views

Blow up and morphism of locally free sheaves

Published on 25 Mar 2026 - 16:02

score 681 · Answer 11 · 2026-03-25 10:55:32

681

Views

Bijection Between Morphisms of Schemes and Local Ring Homomorphisms

Published on 25 Mar 2026 - 10:55

score 61 · Answer 12 · 2020-02-07 13:46:08

61

Views

Rank and degree of $\mathcal{O}_{S \times S}/I_{\Delta}^n$.

Published on 07 Feb 2020 - 13:46

score 201 · Answer 13 · 2020-02-09 10:09:13

201

Views

Question about cokernel of a morphism of sheaves

Published on 09 Feb 2020 - 10:09

score 326 · Answer 14 · 2026-03-29 10:18:40

326

Views

Generically surjective morphism of vector bundles. How to get them?

Published on 29 Mar 2026 - 10:18

score 799 · Answer 15 · 2026-03-25 09:29:20

799

Views

What is the local ring of a scheme $X$ along a subvariety $V$: $\mathcal{O}_{V,X}$?

Published on 25 Mar 2026 - 9:29

List Question

restriction maps of the constant presheaf are necessarily identity

Computing $\mathscr O_X (X − \{x\})$ for $X$ an affine scheme

Where can I learn about Sheaves as an indepdendent topic?

Can the fibre product of schemes be described as a colimit

Just a clarification about a notation used in a question (does $I^n$ mean $I\otimes\cdots\otimes I$?)

vector bundles $\mathcal F, \mathcal G$ such that $\mathcal Hom (\mathcal F, \mathcal G) $ is a direct sum of copies of $\mathcal O_X$

Blow up and Castelnuovo-Mumford Regularity

Factoring a presheaf through a sheaf using the etalé space

Divisorial sheaves as sheaves on $\operatorname{Pic}(X)\times X$

Blow up and morphism of locally free sheaves

Bijection Between Morphisms of Schemes and Local Ring Homomorphisms

Rank and degree of $\mathcal{O}_{S \times S}/I_{\Delta}^n$.

Question about cokernel of a morphism of sheaves

Generically surjective morphism of vector bundles. How to get them?

What is the local ring of a scheme $X$ along a subvariety $V$: $\mathcal{O}_{V,X}$?

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