List questions from divisors-algebraic-geometry

Published on 26 Mar 2026 - 8:23

166

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A Hyperelliptic Compact Riemann Surface $X$ is a 2-sheeted cover of $\mathbb{P}^1$

Published on 04 Dec 2021 - 0:22

94

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Doubts about proof of Castelnuovo theorem IV, 6.4 of Hartshorne

Published on 17 Dec 2021 - 11:45

67

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Cusp in the cuspidal cubic as a non effective Cartier Divisor

Published on 29 Dec 2021 - 20:11

87

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Relative Cartier divisor scheme

Published on 31 Dec 2021 - 1:53

265

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Possible values of $l(np)$ for $p\in X$, where $X$ is a compact Riemann surface of genus 2

Published on 04 Jan 2022 - 17:36

601

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Proof that for an effective divisor $l(D)\leq \deg D +1$

Published on 05 Jan 2022 - 17:17

377

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Effective divisor on smooth projective variety

Published on 07 Jan 2022 - 15:08

118

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Confusion about sum of ramification indices

Published on 26 Mar 2026 - 22:13

163

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Are all Weil divisors principal?

Published on 11 Jan 2022 - 6:26

107

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General way of determine where a rational function $\phi\in k(X)$ is not regular

Published on 20 Jan 2022 - 16:09

190

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Can effective divisors generate all Cartier divisors?

Published on 22 Jan 2022 - 8:22

143

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First Chern class coincides with degree of divisor without poincare duality or de rham cohomology

Published on 26 Mar 2026 - 2:57

396

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What does linear equivalence geometrically mean for varieties?

Published on 26 Mar 2026 - 19:15

162

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Exact sequence in Hartshorne's proof of Clifford's theorem (Theorem IV.5.4)

Published on 03 Feb 2022 - 8:48

List Question

Line bundle of point is twisting sheaf of Serre on projective line

A Hyperelliptic Compact Riemann Surface $X$ is a 2-sheeted cover of $\mathbb{P}^1$

Doubts about proof of Castelnuovo theorem IV, 6.4 of Hartshorne

Cusp in the cuspidal cubic as a non effective Cartier Divisor

Relative Cartier divisor scheme

Possible values of $l(np)$ for $p\in X$, where $X$ is a compact Riemann surface of genus 2

Proof that for an effective divisor $l(D)\leq \deg D +1$

Effective divisor on smooth projective variety

Confusion about sum of ramification indices

Are all Weil divisors principal?

General way of determine where a rational function $\phi\in k(X)$ is not regular

Can effective divisors generate all Cartier divisors?

First Chern class coincides with degree of divisor without poincare duality or de rham cohomology

What does linear equivalence geometrically mean for varieties?

Exact sequence in Hartshorne's proof of Clifford's theorem (Theorem IV.5.4)

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