List questions from sheaf-theory

Published on 25 Mar 2026 - 17:30

280

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Well-definedness of conormal sheaf

Published on 25 Mar 2026 - 16:00

777

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Tensor product of quasi-coherent $\mathcal{O}_X$-modules on a ringed space

Published on 25 Mar 2026 - 14:23

168

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Scheme $\text{Spec}(S^*\text{Hom}(V,W)^{\vee})$ from "The Geometry of Moduli Spaces of Sheaves"

Published on 25 Mar 2026 - 9:29

313

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How is the degree defined in this case?

Published on 25 Mar 2026 - 7:40

218

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Lemma of dévissage from Mumford's AGII

Published on 25 Mar 2026 - 12:54

293

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Help in understanding a sheaf of modules over $\mathcal{R}$

Published on 28 Sep 2019 - 23:28

171

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Definition of $\mathcal{O}(D)(U)$

Published on 29 Sep 2019 - 16:01

63

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Subfunctor of finitely definable elements

Published on 30 Sep 2019 - 18:48

211

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Constructing projective Calabi-Yau varieties

Published on 25 Mar 2026 - 6:00

32

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The definition of sheaf $K^/\mathcal{O}^$

Published on 01 Oct 2019 - 17:23

109

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Sheaves: pretopology versus comma pretopology

Published on 11 Mar 2014 - 14:40

208

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Existence of a long exact sequence for sheaf cohomology

Published on 26 Mar 2026 - 6:21

50

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$X=Spec(A)$. $X=\bigcup\limits_{i=1}^N D(f_i)\Rightarrow (f_1, ..., f_N)=A$

Published on 13 Mar 2014 - 13:33

161

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Understanding Limits and Colimits by Generalized Elements

Published on 14 Mar 2014 - 5:23

List Question

Euler sequence, exact sequence and Blow Up

Well-definedness of conormal sheaf

Tensor product of quasi-coherent $\mathcal{O}_X$-modules on a ringed space

Scheme $\text{Spec}(S^*\text{Hom}(V,W)^{\vee})$ from "The Geometry of Moduli Spaces of Sheaves"

How is the degree defined in this case?

Lemma of dévissage from Mumford's AGII

Help in understanding a sheaf of modules over $\mathcal{R}$

Definition of $\mathcal{O}(D)(U)$

Subfunctor of finitely definable elements

Constructing projective Calabi-Yau varieties

The definition of sheaf $K^/\mathcal{O}^$

Sheaves: pretopology versus comma pretopology

Existence of a long exact sequence for sheaf cohomology

$X=Spec(A)$. $X=\bigcup\limits_{i=1}^N D(f_i)\Rightarrow (f_1, ..., f_N)=A$

Understanding Limits and Colimits by Generalized Elements

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