List questions from etale-cohomology

Published on 11 May 2026 - 7:52

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Cohomology with compact support for sheaves in separated schemes of finite type over a Noetherian scheme: three different definitions

Published on 12 Apr 2026 - 5:01

633

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Pushforward of a constant sheaf in the etale topology

Published on 13 Apr 2026 - 15:08

122

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Etale cohomology approach on $\tau(n)$

Published on 14 Apr 2026 - 2:14

661

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Lack of "good covers" in the étale topology

Published on 11 May 2026 - 4:10

200

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Analogue of locally constant sheaf in algebraic geometry

Published on 13 Apr 2026 - 4:59

197

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Sheaf, étalé space with Riemann surfaces.

Published on 11 Apr 2026 - 12:54

148

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Are any two $\ell$-adic Tate twists (non-canonically) isomorphic?

Published on 15 Apr 2026 - 13:22

5.1k

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Why $R^q(\Gamma \circ \eta_{*}) (\Bbb G_{m, \eta}) = H^q(\eta_{ét}, \Bbb G_{m, \eta})$?

Published on 17 Apr 2026 - 12:44

191

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Cohomology of Severi-Brauer varieties

Published on 13 Apr 2026 - 12:00

302

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Continuity of Galois representations from cohomology

Published on 11 May 2026 - 5:25

148

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Disk in analytic topology vs. the spectrum of a Henselian DVR in etale topology

Published on 15 Apr 2026 - 8:03

328

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Etale fundamental group action on set-theoretic fiber

Published on 14 Apr 2026 - 1:13

3.1k

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Relationship between Galois cohomology and etale cohomology.

Published on 26 Mar 2026 - 17:53

356

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Is this intuition for the etale topology essentially correct?

Published on 14 Apr 2026 - 11:10

List Question

In what sense is $p$-adic Hodge theory related to ordinary (complex) Hodge theory?

Cohomology with compact support for sheaves in separated schemes of finite type over a Noetherian scheme: three different definitions

Pushforward of a constant sheaf in the etale topology

Etale cohomology approach on $\tau(n)$

Lack of "good covers" in the étale topology

Analogue of locally constant sheaf in algebraic geometry

Sheaf, étalé space with Riemann surfaces.

Are any two $\ell$-adic Tate twists (non-canonically) isomorphic?

Why $R^q(\Gamma \circ \eta_{*}) (\Bbb G_{m, \eta}) = H^q(\eta_{ét}, \Bbb G_{m, \eta})$?

Cohomology of Severi-Brauer varieties

Continuity of Galois representations from cohomology

Disk in analytic topology vs. the spectrum of a Henselian DVR in etale topology

Etale fundamental group action on set-theoretic fiber

Relationship between Galois cohomology and etale cohomology.

Is this intuition for the etale topology essentially correct?

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