List questions from sheaf-theory

Published on 04 Jul 2013 - 13:40

1k

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Elementary questions on ample invertible sheaves

Published on 26 Mar 2026 - 8:14

2.2k

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Some questions on the basics of invertible sheaves

Published on 05 Jul 2013 - 3:24

562

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Why do these two constructions of a sheaf associated to a module on a projective scheme agree?

Published on 25 Mar 2026 - 18:55

328

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What is the stalk at a point of the quotient of a scheme?

Published on 23 Feb 2026 - 10:49

544

Views

Quotient presheaf is a sheaf for flasque subsheaf

Published on 09 Jul 2013 - 18:13

1k

Views

Computing Kähler differentials on $\mathbb P^1_A$ (What did Liu intend?)

Published on 25 Mar 2026 - 18:53

1.4k

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Defining the coboundary map $\delta_*$ on the Sheaf Cech Cohomology groups

Published on 12 Jul 2013 - 1:47

644

Views

Computing algebraic de-Rham cohomology via Čech cohomology

Published on 12 Jul 2013 - 8:28

1.9k

Views

Why is a section of a sheaf over closed set defined this way?

Published on 12 Jul 2013 - 16:22

141

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Associated sheaf functor for sheaves over complete Heyting algebras

Published on 14 Jul 2013 - 12:56

508

Views

Projective Objects in a Topos

Published on 30 Mar 2026 - 6:42

249

Views

How does Liu intend his readers to compute $H^0(X,\Omega^1_{X/k})$ of this scheme?

Published on 25 Mar 2026 - 18:59

135

Views

Group actions on Čech cohomology

Published on 17 Jul 2013 - 15:25

862

Views

Sheaf of meromorphic functions on an integral scheme

Published on 18 Jul 2013 - 20:19

List Question

Where does the symbol $\mathcal O$ for sheaves come from?

Elementary questions on ample invertible sheaves

Some questions on the basics of invertible sheaves

Why do these two constructions of a sheaf associated to a module on a projective scheme agree?

What is the stalk at a point of the quotient of a scheme?

Quotient presheaf is a sheaf for flasque subsheaf

Computing Kähler differentials on $\mathbb P^1_A$ (What did Liu intend?)

Defining the coboundary map $\delta_*$ on the Sheaf Cech Cohomology groups

Computing algebraic de-Rham cohomology via Čech cohomology

Why is a section of a sheaf over closed set defined this way?

Associated sheaf functor for sheaves over complete Heyting algebras

Projective Objects in a Topos

How does Liu intend his readers to compute $H^0(X,\Omega^1_{X/k})$ of this scheme?

Group actions on Čech cohomology

Sheaf of meromorphic functions on an integral scheme

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