List questions from schemes

Published on 10 May 2026 - 15:55

717

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Restriction of a scheme to an open subset.

Published on 09 Apr 2026 - 11:23

111

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How to prove $\Gamma(\mathbb{P}^n_R,\mathscr{O}_{\mathbb{P}^n_R}) = R$

Published on 16 Apr 2026 - 15:42

77

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

Published on 14 Apr 2026 - 1:02

66

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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 10 May 2026 - 15:56

109

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

Published on 10 May 2026 - 14:48

798

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Proposition 2.3 Hartshorne

Published on 15 Apr 2026 - 8:29

82

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

Published on 12 Apr 2026 - 4:09

392

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

Published on 11 May 2026 - 4:24

68

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Can you give two closed immersions $(f,f^\sharp),(g,g^\sharp):(X,\mathcal O_X)\to (Y,\mathcal O_Y)$ such that $f=g$ but $f^\sharp\neq g^\sharp$?

Published on 13 Apr 2026 - 17:28

29

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What structure do patch-topology closed subsets of a scheme have?

Published on 08 Apr 2026 - 23:16

72

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What property implies finitely generated-ness of global sections as an algebra?

Published on 12 Apr 2026 - 0:48

87

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Question about meaning behind a map of schemes

Published on 10 May 2026 - 15:51

455

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Finite morphisms of schemes are closed.

Published on 12 Apr 2026 - 8:55

168

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Hartshorne Proposition 2.7.7

Published on 11 May 2026 - 6:28

List Question

Is an affine formal scheme quasi-compact?

Restriction of a scheme to an open subset.

How to prove $\Gamma(\mathbb{P}^n_R,\mathscr{O}_{\mathbb{P}^n_R}) = R$

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

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

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

Proposition 2.3 Hartshorne

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

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

Can you give two closed immersions $(f,f^\sharp),(g,g^\sharp):(X,\mathcal O_X)\to (Y,\mathcal O_Y)$ such that $f=g$ but $f^\sharp\neq g^\sharp$?

What structure do patch-topology closed subsets of a scheme have?

What property implies finitely generated-ness of global sections as an algebra?

Question about meaning behind a map of schemes

Finite morphisms of schemes are closed.

Hartshorne Proposition 2.7.7

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