List questions from divisors-algebraic-geometry

Published on 18 Jun 2022 - 15:18

171

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Divisors: function composition with multiplication by n map on elliptic curve

Published on 22 Jun 2022 - 14:27

105

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Desingularization of the standard Cremona involution of $\mathbb P^2$.

Published on 26 Mar 2026 - 15:17

62

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What is the fiber class of a fibred surface

Published on 25 Jun 2022 - 20:24

223

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Blowing Up the Indeterminancy Locus - Why is this sheaf invertible?

Published on 26 Mar 2026 - 15:17

71

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Possibilities for a divisor in a degree $10$ K3 surface?

Published on 06 Jul 2022 - 12:03

218

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Notions of "locally principal" for closed codimension 1 subschemes and divisors.

Published on 29 Jul 2022 - 1:43

47

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Linear System Attached To Projective Embedding

Published on 29 Jul 2022 - 17:23

74

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Show that function gives a bijection from curve to projective line but $\textrm{div}(f) = [P] - [Q] \implies P = Q$?

Published on 06 Aug 2022 - 13:57

127

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Global sections of the sheaf associated to Weil divisor on $\mathbb{P}^{1}$.

Published on 08 Sep 2022 - 14:56

221

Views

The Riemann-Roch Theorem for line bundles on a regular projective curve

Published on 26 Mar 2026 - 14:43

62

Views

For an effective $D$, which element in $\operatorname{Hom}(\mathcal{O}_X(-D),\mathcal{O}_X)$ is the natural map $\mathcal{O}_X(-D)\to\mathcal{O}_X$?

Published on 17 Sep 2022 - 21:34

192

Views

Double cover ramified on a smooth conic of $\mathbb{P}^{2}$

Published on 18 Sep 2022 - 20:19

69

Views

Pullbacks and fixed parts of linear systems

Published on 25 Sep 2022 - 6:49

19

Views

Existence of tangent vectors at an effective Cartier divisor.

Published on 26 Sep 2022 - 3:57

List Question

Are Weil divisors defined over any algebraic scheme?

Divisors: function composition with multiplication by n map on elliptic curve

Desingularization of the standard Cremona involution of $\mathbb P^2$.

What is the fiber class of a fibred surface

Blowing Up the Indeterminancy Locus - Why is this sheaf invertible?

Possibilities for a divisor in a degree $10$ K3 surface?

Notions of "locally principal" for closed codimension 1 subschemes and divisors.

Linear System Attached To Projective Embedding

Show that function gives a bijection from curve to projective line but $\textrm{div}(f) = [P] - [Q] \implies P = Q$?

Global sections of the sheaf associated to Weil divisor on $\mathbb{P}^{1}$.

The Riemann-Roch Theorem for line bundles on a regular projective curve

For an effective $D$, which element in $\operatorname{Hom}(\mathcal{O}_X(-D),\mathcal{O}_X)$ is the natural map $\mathcal{O}_X(-D)\to\mathcal{O}_X$?

Double cover ramified on a smooth conic of $\mathbb{P}^{2}$

Pullbacks and fixed parts of linear systems

Existence of tangent vectors at an effective Cartier divisor.

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