List questions from algebraic-geometry

Published on 25 Mar 2026 - 1:15

75

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Neighborhood of fiber contains the full pre-image of an open set

Published on 25 Mar 2026 - 20:11

328

Views

Question about Segre embedding proof in Karen's Smith book.

Published on 27 Jul 2018 - 15:54

63

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

Published on 25 Mar 2026 - 6:13

145

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Affine scheme as a cogroup

Published on 27 Jul 2018 - 23:59

1.3k

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Alternative Construction of Sheaf from Sheaf on a Base

Published on 25 Mar 2026 - 19:03

106

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Is $\text{Conf}_n(\mathbb{A}^2)$ an affine variety?

Published on 25 Mar 2026 - 1:36

796

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Proposition 2.3 Hartshorne

Published on 25 Mar 2026 - 20:08

555

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Zero set of non-constant polynomial , in more than one variable, over uncountable algebraically closed field

Published on 25 Mar 2026 - 18:51

186

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Is there a characterization of automorphisms of degree-$2$ affine plane curves over $\mathbb{R}$?

Published on 29 Jul 2018 - 6:27

351

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Descent datum for a module

Published on 25 Mar 2026 - 14:19

80

Views

How can schemes see two points associated with $y = x^2$

Published on 25 Mar 2026 - 20:09

194

Views

Positive even numbered integer solutions of $y=n^2-m^2-x^2$

Published on 26 Mar 2026 - 14:42

135

Views

Roots to a Special Homogeneous Polynomial Equations

Published on 01 Apr 2026 - 8:34

389

Views

About the kernel of the structure map of a morphism of schemes

Published on 25 Mar 2026 - 22:06

List Question

Why don't these morphisms extend?

Neighborhood of fiber contains the full pre-image of an open set

Question about Segre embedding proof in Karen's Smith book.

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

Affine scheme as a cogroup

Alternative Construction of Sheaf from Sheaf on a Base

Is $\text{Conf}_n(\mathbb{A}^2)$ an affine variety?

Proposition 2.3 Hartshorne

Zero set of non-constant polynomial , in more than one variable, over uncountable algebraically closed field

Is there a characterization of automorphisms of degree-$2$ affine plane curves over $\mathbb{R}$?

Descent datum for a module

How can schemes see two points associated with $y = x^2$

Positive even numbered integer solutions of $y=n^2-m^2-x^2$

Roots to a Special Homogeneous Polynomial Equations

About the kernel of the structure map of a morphism of schemes

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