List questions from affine-schemes

Published on 01 Jun 2023 - 13:54

42

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What is a germ of a presheaf?

Published on 20 Mar 2026 - 0:24

106

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The equality $\operatorname{Spec}\operatorname{Fun}\mathfrak{g}^* = \mathfrak{g}^*$

Published on 10 Jun 2023 - 15:31

60

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How is a vector space an affine algebraic variety?

Published on 11 Jun 2023 - 13:28

78

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Should a closed immersion of schemes be closed map of topological spaces by definition?

Published on 16 Jun 2023 - 4:52

153

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Scheme theoretic fiber vs. Degree of a point of a finite morphism of affine schemes

Published on 17 Jun 2023 - 23:23

172

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Geometrical interpretation of $\operatorname{Spec}(\mathbb{R}[x,y]/(x^2+y^2))$

Published on 26 Mar 2026 - 9:27

55

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More examples of morphisms of ringed spaces that aren't local?

Published on 23 Feb 2026 - 5:13

36

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Relationship between affine lines with coordinate $z$ and coordinate $z^2$

Published on 05 Sep 2023 - 9:29

50

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Intuition of projective line via glueing

Published on 25 Mar 2026 - 13:55

57

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Proof criticize: restriction maps of integral schemes are injective

Published on 21 Sep 2023 - 13:59

67

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When can $\textbf{SpecMax}(R)$ be a scheme?

Published on 23 Feb 2026 - 6:53

42

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Zeros of a finite support function on elliptic curve are torsion

Published on 25 Mar 2026 - 14:34

85

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Rising Sea exercise 5.3.H

Published on 06 Oct 2023 - 12:00

41

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global section of a B-scheme defines a morphism to projective $B$-scheme

Published on 25 Mar 2026 - 13:59

List Question

The category of affine schemes is anti-equivalent to the category of commutative rings

What is a germ of a presheaf?

The equality $\operatorname{Spec}\operatorname{Fun}\mathfrak{g}^* = \mathfrak{g}^*$

How is a vector space an affine algebraic variety?

Should a closed immersion of schemes be closed map of topological spaces by definition?

Scheme theoretic fiber vs. Degree of a point of a finite morphism of affine schemes

Geometrical interpretation of $\operatorname{Spec}(\mathbb{R}[x,y]/(x^2+y^2))$

More examples of morphisms of ringed spaces that aren't local?

Relationship between affine lines with coordinate $z$ and coordinate $z^2$

Intuition of projective line via glueing

Proof criticize: restriction maps of integral schemes are injective

When can $\textbf{SpecMax}(R)$ be a scheme?

Zeros of a finite support function on elliptic curve are torsion

Rising Sea exercise 5.3.H

global section of a B-scheme defines a morphism to projective $B$-scheme

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