Question

if $f$ and $g$ compose with a dominant morphism are the same, show that they agrees on a open dense subset as morphisms of schemes

score 98 · Answer 1 · 2018-05-15 23:30:53

98

Views

if $f$ and $g$ compose with a dominant morphism are the same, show that they agrees on a open dense subset as morphisms of schemes

Published on 15 May 2018 - 23:30

score 170 · Answer 2 · 2018-05-18 06:56:15

170

Views

How an Affine hull can be represented by an Affine set?

Published on 18 May 2018 - 6:56

score 66 · Answer 3 · 2026-03-22 05:57:57

66

Views

Puzzling with Kahler differentials

Published on 22 Mar 2026 - 5:57

score 310 · Answer 4 · 2018-05-31 17:15:26

310

Views

Closed and $\mathbb{C}$-rational points of $\operatorname{Spec}(\mathbb{R}[x,y]/(f))$

Published on 31 May 2018 - 17:15

score 135 · Answer 5 · 2026-03-25 01:17:33

135

Views

Is $X=(x^2-yx, y^2-xz, z^2-x^2y) $ isomorphic to $ \mathbb A_{K}^1$?

Published on 25 Mar 2026 - 1:17

score 461 · Answer 6 · 2026-03-25 03:01:08

461

Views

Underlying variety of $\mathbb{G}_m$

Published on 25 Mar 2026 - 3:01

score 114 · Answer 7 · 2026-03-23 00:23:00

114

Views

Notion of inner automorphisms for group schemes

Published on 23 Mar 2026 - 0:23

score 241 · Answer 8 · 2018-07-01 21:22:41

241

Views

What's an $\mathcal O_X$-algebra when $X= \operatorname{Spec} R$?

Published on 01 Jul 2018 - 21:22

score 136 · Answer 9 · 2018-07-03 13:47:48

136

Views

A naive question about the scheme theory: regard $\mathbb C^n$ as a scheme

Published on 03 Jul 2018 - 13:47

score 1.4k · Answer 10 · 2026-03-22 17:12:20

1.4k

Views

What is an $R$-valued point on a scheme over $R$?

Published on 22 Mar 2026 - 17:12

score 66 · Answer 11 · 2026-03-22 20:06:57

66

Views

Is an affine formal scheme quasi-compact?

Published on 22 Mar 2026 - 20:06

score 139 · Answer 12 · 2018-07-22 02:29:18

139

Views

Criteria for Ideal of a Hopf Algebra to Yield Closed Subgroup

Published on 22 Jul 2018 - 2:29

score 62 · Answer 13 · 2018-07-27 17:09:34

62

Views

Have you seen the symbol $D(g)$ with $g\in \mathcal O_X(X)$ where $X$ is a scheme?

Published on 27 Jul 2018 - 17:09

score 173 · Answer 14 · 2026-03-22 04:19:39

173

Views

Finite maps and jacobian condition

Published on 22 Mar 2026 - 4:19

score 207 · Answer 15 · 2018-07-31 08:37:44

207

Views

Does there exist an ideal sheaf $\mathcal F$ on some affine scheme $X$ such that $\mathcal F$ is not quasi-coherent?

Published on 31 Jul 2018 - 8:37

List Question

if $f$ and $g$ compose with a dominant morphism are the same, show that they agrees on a open dense subset as morphisms of schemes

How an Affine hull can be represented by an Affine set?

Puzzling with Kahler differentials

Closed and $\mathbb{C}$-rational points of $\operatorname{Spec}(\mathbb{R}[x,y]/(f))$

Is $X=(x^2-yx, y^2-xz, z^2-x^2y) $ isomorphic to $ \mathbb A_{K}^1$?

Underlying variety of $\mathbb{G}_m$

Notion of inner automorphisms for group schemes

What's an $\mathcal O_X$-algebra when $X= \operatorname{Spec} R$?

A naive question about the scheme theory: regard $\mathbb C^n$ as a scheme

What is an $R$-valued point on a scheme over $R$?

Is an affine formal scheme quasi-compact?

Criteria for Ideal of a Hopf Algebra to Yield Closed Subgroup

Have you seen the symbol $D(g)$ with $g\in \mathcal O_X(X)$ where $X$ is a scheme?

Finite maps and jacobian condition

Does there exist an ideal sheaf $\mathcal F$ on some affine scheme $X$ such that $\mathcal F$ is not quasi-coherent?

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