Question

Why does $D_U(f) = D_V(f_{|V} )$ for U, V be affine open subschemes of X?

score 162 · Answer 1 · 2019-11-15 20:44:17

162

Views

Why does $D_U(f) = D_V(f_{|V} )$ for U, V be affine open subschemes of X?

Published on 15 Nov 2019 - 20:44

score 439 · Answer 2 · 2019-11-28 16:24:27

439

Views

Proof attempt of exercise 3.2, Ch. III Hartshorne

Published on 28 Nov 2019 - 16:24

score 1.5k · Answer 3 · 2019-12-16 17:39:41

1.5k

Views

Why is the plane minus the origin not an affine scheme?

Published on 16 Dec 2019 - 17:39

score 99 · Answer 4 · 2019-12-18 12:10:00

99

Views

Show the stalk of $Spec( \mathbb{Z}/60)$ at $(2)$ is $\mathbb{Z}/4$

Published on 18 Dec 2019 - 12:10

score 173 · Answer 5 · 2026-03-24 04:01:55

173

Views

Rings and locales

Published on 24 Mar 2026 - 4:01

score 157 · Answer 6 · 2026-03-25 15:42:12

157

Views

On a special map $ \operatorname {Spec}(\mathbb C[x,z]) \to \operatorname {Spec}(\mathbb C[x,y])$

Published on 25 Mar 2026 - 15:42

score 113 · Answer 7 · 2020-01-11 20:57:30

113

Views

Question about inclusion map of an open set of a scheme

Published on 11 Jan 2020 - 20:57

score 217 · Answer 8 · 2020-01-18 21:20:10

217

Views

Questions regarding Gathmann's motivations for schemes

Published on 18 Jan 2020 - 21:20

score 68 · Answer 9 · 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 127 · Answer 10 · 2020-01-29 15:21:27

127

Views

Non - affine subscheme of $Spec(\mathbb{Z}[t])$

Published on 29 Jan 2020 - 15:21

score 137 · Answer 11 · 2020-01-31 09:45:44

137

Views

Question about an inclusion of a closed scheme into an affine scheme

Published on 31 Jan 2020 - 9:45

score 969 · Answer 12 · 2020-02-03 06:32:41

969

Views

Showing the correspondence between morphism of affine schemes and ring homomorphism is injective

Published on 03 Feb 2020 - 6:32

score 76 · Answer 13 · 2020-02-06 08:39:32

76

Views

Question about the restiction of $O_X$-ideal of a scheme $X$ to an affine open

Published on 06 Feb 2020 - 8:39

score 681 · Answer 14 · 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 98 · Answer 15 · 2026-03-25 15:42:16

98

Views

Why is there a basic open, everywhere dense neighborhood of every closed point on a reduced affine scheme?

Published on 25 Mar 2026 - 15:42

List Question

Why does $D_U(f) = D_V(f_{|V} )$ for U, V be affine open subschemes of X?

Proof attempt of exercise 3.2, Ch. III Hartshorne

Why is the plane minus the origin not an affine scheme?

Show the stalk of $Spec( \mathbb{Z}/60)$ at $(2)$ is $\mathbb{Z}/4$

Rings and locales

On a special map $ \operatorname {Spec}(\mathbb C[x,z]) \to \operatorname {Spec}(\mathbb C[x,y])$

Question about inclusion map of an open set of a scheme

Questions regarding Gathmann's motivations for schemes

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

Non - affine subscheme of $Spec(\mathbb{Z}[t])$

Question about an inclusion of a closed scheme into an affine scheme

Showing the correspondence between morphism of affine schemes and ring homomorphism is injective

Question about the restiction of $O_X$-ideal of a scheme $X$ to an affine open

Bijection Between Morphisms of Schemes and Local Ring Homomorphisms

Why is there a basic open, everywhere dense neighborhood of every closed point on a reduced affine scheme?

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