List questions from sheaf-theory

Published on 17 Sep 2013 - 7:31

113

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Help with a proof in Hartshorne's book

Published on 17 Sep 2013 - 15:03

159

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Doubt in Hartshorne's book

Published on 18 Sep 2013 - 11:22

94

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$K$-Category $M(0, 0) = M(A, 0) = M(0, A)$ using definition from Swan's 'Sheaf Theory'

Published on 19 Sep 2013 - 4:55

50

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Difficult to understand this map.

Published on 20 Sep 2013 - 0:30

426

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Equivalent definitions of the sheafification of a presheaf

Published on 20 Sep 2013 - 8:41

748

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Extending a sheaf by zero outside a locally closed subspace

Published on 21 Sep 2013 - 0:14

132

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Constant sheaves associated with locally closed subsets

Published on 22 Sep 2013 - 16:12

515

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Characterization of epimorphisms of sheaves on a site

Published on 30 Mar 2026 - 8:27

677

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Invertible sheaves and invertible classes in the Picard group

Published on 24 Sep 2013 - 19:13

720

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Ample Cartier divisors and coherent sheaves

Published on 24 Sep 2013 - 19:49

93

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Is there a name for a sheaf where every germ extends to a global section?

Published on 26 Sep 2013 - 20:18

1.1k

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Definition of Cartier divisors

Published on 29 Sep 2013 - 1:55

249

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Question on skyscraper sheaf and direct limit.

Published on 01 Oct 2013 - 7:58

49

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Given a sheaf $\mathcal{N}$ of $\mathcal{O}_Y$-modules defined by a finitely generated $\mathbb{C}[x]$-module, what is $f^*\mathcal{N}$?

Published on 09 Oct 2013 - 0:52

List Question

If $\varphi$ is an isomorphism, so is $\varphi_p$.

Help with a proof in Hartshorne's book

Doubt in Hartshorne's book

$K$-Category $M(0, 0) = M(A, 0) = M(0, A)$ using definition from Swan's 'Sheaf Theory'

Difficult to understand this map.

Equivalent definitions of the sheafification of a presheaf

Extending a sheaf by zero outside a locally closed subspace

Constant sheaves associated with locally closed subsets

Characterization of epimorphisms of sheaves on a site

Invertible sheaves and invertible classes in the Picard group

Ample Cartier divisors and coherent sheaves

Is there a name for a sheaf where every germ extends to a global section?

Definition of Cartier divisors

Question on skyscraper sheaf and direct limit.

Given a sheaf $\mathcal{N}$ of $\mathcal{O}_Y$-modules defined by a finitely generated $\mathbb{C}[x]$-module, what is $f^*\mathcal{N}$?

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