List questions from affine-schemes

Published on 25 Mar 2026 - 3:02

70

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Is $D(f)$ the smallest open set of $\operatorname{Spec}B$ such that $D_+(f)\subset D(f)$?

Published on 25 Mar 2026 - 1:18

45

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Are $u_1,u_2,\cdots,u_n$ independent in $M$?

Published on 25 Mar 2026 - 4:39

231

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Proof check for closed sub scheme of an affine scheme is affine

Published on 14 Aug 2018 - 20:36

587

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Functor of points of the affine line with double origin

Published on 25 Mar 2026 - 3:21

68

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A lemma about standard open sets of a scheme.

Published on 22 Sep 2018 - 6:01

201

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What is the tangent space of $\mathbb{Z}$ at $\mathfrak{p}=(5)$?

Published on 01 Oct 2018 - 13:36

488

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Kernel of a morphism of $k$-algebras

Published on 28 Oct 2018 - 18:30

392

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Question about Hartshorne Ch. II. 2 Proposition 2.2a (and basis for topology of Spec(A))

Published on 28 Oct 2018 - 19:34

231

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Zero-dimensional Hilbert scheme of two points and Hilbert-Chow morphism

Published on 15 Nov 2018 - 10:02

103

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Action of finite group of ring automorphisms

Published on 12 Dec 2018 - 10:44

218

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proposition II.5.9 in Hartshorne

Published on 14 Dec 2018 - 15:43

356

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When does a quasifinite surjective flat morphism have constant fiber multiplicity near a point?

Published on 16 Dec 2018 - 6:44

127

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Is constancy of fiber degree analytic-local on the source in a finite flat family?

Published on 19 Dec 2018 - 7:16

95

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Geometry of the subalgebra $\Bbbk[x^2-1]\leq \Bbbk[x]$ (intuition for integral elements)

Published on 23 Feb 2026 - 2:30

List Question

Question about meaning behind a map of schemes

Is $D(f)$ the smallest open set of $\operatorname{Spec}B$ such that $D_+(f)\subset D(f)$?

Are $u_1,u_2,\cdots,u_n$ independent in $M$?

Proof check for closed sub scheme of an affine scheme is affine

Functor of points of the affine line with double origin

A lemma about standard open sets of a scheme.

What is the tangent space of $\mathbb{Z}$ at $\mathfrak{p}=(5)$?

Kernel of a morphism of $k$-algebras

Question about Hartshorne Ch. II. 2 Proposition 2.2a (and basis for topology of Spec(A))

Zero-dimensional Hilbert scheme of two points and Hilbert-Chow morphism

Action of finite group of ring automorphisms

proposition II.5.9 in Hartshorne

When does a quasifinite surjective flat morphism have constant fiber multiplicity near a point?

Is constancy of fiber degree analytic-local on the source in a finite flat family?

Geometry of the subalgebra $\Bbbk[x^2-1]\leq \Bbbk[x]$ (intuition for integral elements)

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