List questions from sheaf-theory

Published on 25 Mar 2026 - 10:44

102

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What is the meaning of "support propre"?

Published on 22 Mar 2026 - 3:39

515

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Relative spectrum of a quasicoherent sheaf of algebras (affine case)

Published on 10 Jul 2018 - 19:19

319

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About gluing of sheaves on a cover

Published on 19 Mar 2026 - 23:04

1.7k

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Does the category of sheaves have enough injectives?

Published on 14 Jul 2018 - 11:20

77

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Confused about definition: "Pointwise Equalizer"

Published on 22 Mar 2026 - 15:58

407

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Vanishing of Chern characters in degree below codimension of support

Published on 19 Jul 2018 - 2:16

361

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Is $\mu_n$ a locally constant sheaf for the Zariski topology?

Published on 19 Jul 2018 - 4:13

153

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Leary cover and good cover

Published on 25 Mar 2026 - 3:01

1.3k

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Showing that the skyscraper sheaf is a sheaf.

Published on 23 Jul 2018 - 22:46

682

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Confusion about elements of the stalk of the direct image sheaf

Published on 25 Jul 2018 - 17:45

1.3k

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Alternative Construction of Sheaf from Sheaf on a Base

Published on 28 Jul 2018 - 8:03

388

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About the kernel of the structure map of a morphism of schemes

Published on 30 Jul 2018 - 5:23

208

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Does there exist an ideal sheaf $\mathcal F$ on some affine scheme $X$ such that $\mathcal F$ is not quasi-coherent?

Published on 25 Mar 2026 - 6:13

719

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Hartshorne Exercise II. 1.18

Published on 25 Mar 2026 - 3:19

List Question

Maps between two Leray spectral sequences

What is the meaning of "support propre"?

Relative spectrum of a quasicoherent sheaf of algebras (affine case)

About gluing of sheaves on a cover

Does the category of sheaves have enough injectives?

Confused about definition: "Pointwise Equalizer"

Vanishing of Chern characters in degree below codimension of support

Is $\mu_n$ a locally constant sheaf for the Zariski topology?

Leary cover and good cover

Showing that the skyscraper sheaf is a sheaf.

Confusion about elements of the stalk of the direct image sheaf

Alternative Construction of Sheaf from Sheaf on a Base

About the kernel of the structure map of a morphism of schemes

Does there exist an ideal sheaf $\mathcal F$ on some affine scheme $X$ such that $\mathcal F$ is not quasi-coherent?

Hartshorne Exercise II. 1.18

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