Question

Open subschemes of open sets not contained in basic open sets

score 45 · Answer 1 · 2023-10-29 16:04:20

45

Views

Open subschemes of open sets not contained in basic open sets

Published on 29 Oct 2023 - 16:04

score 109 · Answer 2 · 2023-11-06 15:25:16

109

Views

Gluing in the sheaf of meromorphic functions on an affine scheme

Published on 06 Nov 2023 - 15:25

score 45 · Answer 3 · 2026-03-25 13:53:37

45

Views

Morphism of schemes and closed points

Published on 25 Mar 2026 - 13:53

score 72 · Answer 4 · 2026-03-25 13:58:01

72

Views

image of Segre embedding is cut out (scheme-theoretically) by vanishing minors

Published on 25 Mar 2026 - 13:58

score 57 · Answer 5 · 2026-03-26 03:06:10

57

Views

Can we explicitly describe the derived pullback $\mathbf L\pi^* \widetilde M$ for a closed immersion $\pi$ of affine schemes?

Published on 26 Mar 2026 - 3:06

score 28 · Answer 6 · 2023-11-26 08:49:04

28

Views

Locus of the fibered product of two affine lines with doubled origin where projections coincide

Published on 26 Nov 2023 - 8:49

score 61 · Answer 7 · 2026-03-25 20:20:49

61

Views

If $f:\operatorname{Spec} R \to X$ is a map with $R$ local and with closed point landing in an open $U\subset X$, then $im(f)\subset U$ too.

Published on 25 Mar 2026 - 20:20

score 25 · Answer 8 · 2026-03-26 08:04:37

25

Views

Geometric interpretation of Lefschetz number for local fields

Published on 26 Mar 2026 - 8:04

score 64 · Answer 9 · 2026-03-25 20:20:49

64

Views

If $R$ is a local ring, the morphism of schemes $f: \operatorname{Spec} R \to X$ is determined by the image of the closed point?

Published on 25 Mar 2026 - 20:20

score 106 · Answer 10 · 2023-12-28 13:21:24

106

Views

Picture of $\mathrm{Spec}(\mathbb{R}[x])$

Published on 28 Dec 2023 - 13:21

score 83 · Answer 11 · 2023-12-28 18:03:24

83

Views

Principal opens of spectrum of a ring are (quasi-)compact

Published on 28 Dec 2023 - 18:03

score 56 · Answer 12 · 2026-03-25 13:54:08

56

Views

Reduced, irreducible and integral schemes

Published on 25 Mar 2026 - 13:54

score 68 · Answer 13 · 2026-03-26 01:10:53

68

Views

On free direct summand locus of finitely generated modules over commutative Noetherian rings

Published on 26 Mar 2026 - 1:10

score 65 · Answer 14 · 2024-01-14 17:27:57

65

Views

Krull dimension of affine open subscheme of Noetherian scheme containing the generic points of all irreducible components

Published on 14 Jan 2024 - 17:27

score 126 · Answer 15 · 2024-01-19 10:09:20

126

Views

Definition of being smooth of relative dimension in Vakil

Published on 19 Jan 2024 - 10:09

List Question

Open subschemes of open sets not contained in basic open sets

Gluing in the sheaf of meromorphic functions on an affine scheme

Morphism of schemes and closed points

image of Segre embedding is cut out (scheme-theoretically) by vanishing minors

Can we explicitly describe the derived pullback $\mathbf L\pi^* \widetilde M$ for a closed immersion $\pi$ of affine schemes?

Locus of the fibered product of two affine lines with doubled origin where projections coincide

If $f:\operatorname{Spec} R \to X$ is a map with $R$ local and with closed point landing in an open $U\subset X$, then $im(f)\subset U$ too.

Geometric interpretation of Lefschetz number for local fields

If $R$ is a local ring, the morphism of schemes $f: \operatorname{Spec} R \to X$ is determined by the image of the closed point?

Picture of $\mathrm{Spec}(\mathbb{R}[x])$

Principal opens of spectrum of a ring are (quasi-)compact

Reduced, irreducible and integral schemes

On free direct summand locus of finitely generated modules over commutative Noetherian rings

Krull dimension of affine open subscheme of Noetherian scheme containing the generic points of all irreducible components

Definition of being smooth of relative dimension in Vakil

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