List questions from sheaf-cohomology

Published on 10 May 2015 - 18:48

195

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Sheaf, étalé space with Riemann surfaces.

Published on 26 Mar 2026 - 16:22

1.6k

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What is the definition for a fine sheaf/ a partition of the unity on a sheaf?

Published on 29 May 2015 - 19:07

3.1k

Views

Calculate the cohomology group of $U(n)$ by spectral sequence.

Published on 26 Mar 2026 - 6:31

190

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Cohomologies of $\Omega^k_{\mathbb{P}^n}$ and $\bigwedge\nolimits^k T_{\mathbb{P}^n}$

Published on 01 Jun 2015 - 18:54

545

Views

Global sections of a tangent sheaf of a blown-up surface.

Published on 25 Mar 2026 - 21:49

1.5k

Views

Calculation with Leray spectral sequence

Published on 26 Mar 2026 - 9:45

867

Views

Calculating global sections of sheaves

Published on 15 Jun 2015 - 23:25

1.6k

Views

Globally generated vector bundle

Published on 25 Mar 2026 - 15:57

324

Views

Higher direct image of morphism with generic fiber $\mathbb{P}^1$

Published on 26 Jun 2015 - 23:49

115

Views

Computing ${\mathcal Ext}^i_{\mathcal{O}_X}(\mathcal{O}_D, \mathcal{O}_X)$, where $D\subset X$ is a divisor

Published on 07 Jul 2015 - 0:32

235

Views

A question about the pull-back and proper pushforward functors (convolution product of perverse sheaves) on $SL(2,\mathbb C)$

Published on 08 Jul 2015 - 16:40

174

Views

Interpreting the fist Cech cohomology group

Published on 09 Jul 2015 - 11:58

191

Views

Equivalence between derived categories preserve distinguished triangles

Published on 15 Jul 2015 - 6:12

82

Views

Zero in the Grothedieck group of the derived category

Published on 15 Jul 2015 - 9:38

List Question

Theory around the Cellular Sheaf

Sheaf, étalé space with Riemann surfaces.

What is the definition for a fine sheaf/ a partition of the unity on a sheaf?

Calculate the cohomology group of $U(n)$ by spectral sequence.

Cohomologies of $\Omega^k_{\mathbb{P}^n}$ and $\bigwedge\nolimits^k T_{\mathbb{P}^n}$

Global sections of a tangent sheaf of a blown-up surface.

Calculation with Leray spectral sequence

Calculating global sections of sheaves

Globally generated vector bundle

Higher direct image of morphism with generic fiber $\mathbb{P}^1$

Computing ${\mathcal Ext}^i_{\mathcal{O}_X}(\mathcal{O}_D, \mathcal{O}_X)$, where $D\subset X$ is a divisor

A question about the pull-back and proper pushforward functors (convolution product of perverse sheaves) on $SL(2,\mathbb C)$

Interpreting the fist Cech cohomology group

Equivalence between derived categories preserve distinguished triangles

Zero in the Grothedieck group of the derived category

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