List questions from sheaf-theory

Published on 26 Mar 2026 - 7:38

50

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Finding a sheaf lying above an object satisfying some property

Published on 02 Sep 2014 - 18:49

460

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Abstract nonsense proof that stalks of $\mathcal{O}_X$ modules are modules over $\mathcal{O}_X$-stalks

Published on 03 Sep 2014 - 18:29

36

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Co-domain of a sheaf

Published on 06 Sep 2014 - 2:06

257

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Is there an explicit description for injective sheaves?

Published on 07 Sep 2014 - 8:26

995

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Possible mistake in Gortz-Wedhorn's algebraic geometry book

Published on 11 Sep 2014 - 4:06

80

Views

When do functions turn a space into a locally ringed space?

Published on 16 Sep 2014 - 12:23

971

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On structure sheaf of an affine scheme

Published on 18 Sep 2014 - 20:43

1.1k

Views

Restriction of sheaf via inclusion induces isomorphism on stalks

Published on 19 Sep 2014 - 19:14

230

Views

Acyclic but not flasque sheaf of abelian group?

Published on 20 Sep 2014 - 16:29

576

Views

Why is $\phi:\mathbb{P}^n\rightarrow \mathbb{P}^m$ constant if dim $\phi(\mathbb{P}^n)<n$?

Published on 24 Sep 2014 - 8:43

262

Views

Understanding the mechanics of gluing sections of presheaves to obtain sheaves?

Published on 26 Sep 2014 - 1:31

278

Views

etale sheafification of a presheaf

Published on 25 Mar 2026 - 23:53

1.5k

Views

Extension of coherent sheaf from open subspace.

Published on 25 Mar 2026 - 12:54

367

Views

Two different definitions of sheaf of $K$-modules and tensor products.

Published on 05 Oct 2014 - 21:28

List Question

Étalé space for sheaf of sections of a fiber bundle

Finding a sheaf lying above an object satisfying some property

Abstract nonsense proof that stalks of $\mathcal{O}_X$ modules are modules over $\mathcal{O}_X$-stalks

Co-domain of a sheaf

Is there an explicit description for injective sheaves?

Possible mistake in Gortz-Wedhorn's algebraic geometry book

When do functions turn a space into a locally ringed space?

On structure sheaf of an affine scheme

Restriction of sheaf via inclusion induces isomorphism on stalks

Acyclic but not flasque sheaf of abelian group?

Why is $\phi:\mathbb{P}^n\rightarrow \mathbb{P}^m$ constant if dim $\phi(\mathbb{P}^n)<n$?

Understanding the mechanics of gluing sections of presheaves to obtain sheaves?

etale sheafification of a presheaf

Extension of coherent sheaf from open subspace.

Two different definitions of sheaf of $K$-modules and tensor products.

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