List questions from sheaf-cohomology

Published on 17 Nov 2019 - 8:23

233

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Hilbert's 90 Theorem proof clarification (Milne's Étale Cohomology)

Published on 18 Nov 2019 - 18:59

144

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For what classes of schemes can we compute cohomology via standard methods?

Published on 29 Nov 2019 - 1:41

81

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Why does $(L, L') = 0$ imply $H^0(L) = 0$, if $L'$ is ample, and the variety is a K3 surface?

Published on 01 Dec 2019 - 20:08

1.4k

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Ext groups of sheaves and sheaf cohomology in the context of duality theorems

Published on 18 Dec 2019 - 3:21

138

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Confused of the direct limit and the quotient of a disjoint union

Published on 21 Dec 2019 - 17:58

101

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Neron Severi group: two descriptions

Published on 24 Dec 2019 - 5:07

104

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Infinitesimal neighborhoods of an affine bundle

Published on 27 Dec 2019 - 6:05

139

Views

Čech cohomology and sheaf cohomology

Published on 12 Jan 2020 - 19:35

383

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Cohomology beyond Hartshorne's Algebraic Geometry

Published on 12 Jan 2020 - 21:09

96

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IC complex on $\Bbb C = \Bbb C^* \sqcup \{0\}$

Published on 13 Jan 2020 - 14:41

805

Views

Doubt over a proof about higher direct image functors in Hartshorne

Published on 25 Mar 2026 - 12:37

104

Views

Blow up and Castelnuovo-Mumford Regularity

Published on 25 Mar 2026 - 12:54

178

Views

Cohomology of the sheaf $\mathcal{M}^*$ of invertible meromorphic functions on a Riemann surface

Published on 25 Mar 2026 - 4:42

107

Views

Theorem on normal singularities from Badescu's Algebraic Surfaces

Published on 20 Feb 2020 - 23:03

List Question

Trying to understand why Cech cohomology computes derived functor cohomology

Hilbert's 90 Theorem proof clarification (Milne's Étale Cohomology)

For what classes of schemes can we compute cohomology via standard methods?

Why does $(L, L') = 0$ imply $H^0(L) = 0$, if $L'$ is ample, and the variety is a K3 surface?

Ext groups of sheaves and sheaf cohomology in the context of duality theorems

Confused of the direct limit and the quotient of a disjoint union

Neron Severi group: two descriptions

Infinitesimal neighborhoods of an affine bundle

Čech cohomology and sheaf cohomology

Cohomology beyond Hartshorne's Algebraic Geometry

IC complex on $\Bbb C = \Bbb C^* \sqcup \{0\}$

Doubt over a proof about higher direct image functors in Hartshorne

Blow up and Castelnuovo-Mumford Regularity

Cohomology of the sheaf $\mathcal{M}^*$ of invertible meromorphic functions on a Riemann surface

Theorem on normal singularities from Badescu's Algebraic Surfaces

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