User Piotr Achinger

7 votes

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Criteria for when Gauss-Manin sheaves are vector bundles

answered Mar 27 at 15:26

7 votes

Frobenius pushforward of an equivariant tautological bundle on the flag variety

answered Nov 8, 2022 at 13:47

6 votes

Does p-adic etale cohomology know the variety has ordinary reduction or not?

answered Apr 2, 2022 at 12:18

6 votes

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On the noetherianess of some subalgebras of an affinoid algebra

answered Oct 12, 2022 at 8:46

6 votes

Compactification of rigid-analytic varieties

answered Apr 10 at 7:36

6 votes

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Spectrum of a ring (studied by Krull?) of rational functions

answered Oct 16, 2020 at 19:00

6 votes

Explicit example de Rham moduli space of connections

answered Jul 29, 2021 at 11:06

6 votes

CY fibration over $\mathbb P^1$ without any singular fibers

answered May 16, 2021 at 18:31

6 votes

Deforming to decompose vector bundles

answered May 29, 2013 at 15:31

6 votes

cohomology of the Gauss-Manin connection

answered Jan 11, 2013 at 20:43

6 votes

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Complement of a subscheme

answered Dec 13, 2013 at 9:35

6 votes

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On the dualizing sheaf of a curve

answered Feb 16, 2014 at 19:51

6 votes

Finite extension of local fields

answered Aug 8, 2014 at 0:35

6 votes

Equivalent definitions of arithmetically Cohen-Macaulay varieties

answered Apr 27, 2012 at 18:48

6 votes

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Surjectivity counit of pushforward-pullback adjunction of an affine morphism

answered May 29, 2018 at 9:56

6 votes

etale topology of local schemes

answered Apr 10, 2018 at 19:54

6 votes

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Flatness of Normalization of regular schemes

answered Oct 2, 2014 at 4:50

6 votes

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Why is it useful for the (relative) Picard functor to be representable?

answered Nov 4, 2016 at 21:04

6 votes

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Binomial coefficients in discrete valuation rings

answered Jun 23, 2018 at 16:27

6 votes

Can one recover an algebraically closed field $k$ from the dots and arrows of its category of finitely generated $k$-algebras?

answered Nov 19, 2018 at 20:36

6 votes

Finite etale covers of products of curves

answered Apr 10, 2019 at 16:57

6 votes

Learning roadmap for complex geometry

answered Dec 6, 2019 at 19:15

6 votes

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Relative logarithmic cotangent bundle

answered Feb 20, 2020 at 7:33

5 votes

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Sheaf cohomology commutes with colimits of sheaves

answered Jun 24, 2020 at 8:52

5 votes

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Question about automorphism functor in Sernesi's "Deformations of algebraic schemes"

answered Jul 1, 2020 at 10:36

5 votes

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The sheafification of taking cohomology is trivial?

answered Jan 5, 2019 at 11:16

5 votes

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Descent of a line bundle from normalisation

answered Jul 6, 2017 at 9:07

5 votes

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Does a section having no zero locus divisor imply that it is nowhere vanishing?

answered Nov 6, 2012 at 4:46

5 votes

Elkies' supersingularity theorem in higher dimension

answered Feb 9, 2011 at 15:54

5 votes

Interesting examples of flasque sheaves?

answered Feb 17, 2011 at 13:03

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187 Answers

Criteria for when Gauss-Manin sheaves are vector bundles

Frobenius pushforward of an equivariant tautological bundle on the flag variety

Does p-adic etale cohomology know the variety has ordinary reduction or not?

On the noetherianess of some subalgebras of an affinoid algebra

Compactification of rigid-analytic varieties

Spectrum of a ring (studied by Krull?) of rational functions

Explicit example de Rham moduli space of connections

CY fibration over $\mathbb P^1$ without any singular fibers

Deforming to decompose vector bundles

cohomology of the Gauss-Manin connection

Complement of a subscheme

On the dualizing sheaf of a curve

Finite extension of local fields

Equivalent definitions of arithmetically Cohen-Macaulay varieties

Surjectivity counit of pushforward-pullback adjunction of an affine morphism

etale topology of local schemes

Flatness of Normalization of regular schemes

Why is it useful for the (relative) Picard functor to be representable?

Binomial coefficients in discrete valuation rings

Can one recover an algebraically closed field $k$ from the dots and arrows of its category of finitely generated $k$-algebras?

Finite etale covers of products of curves

Learning roadmap for complex geometry

Relative logarithmic cotangent bundle

Sheaf cohomology commutes with colimits of sheaves

Question about automorphism functor in Sernesi's "Deformations of algebraic schemes"

The sheafification of taking cohomology is trivial?

Descent of a line bundle from normalisation

Does a section having no zero locus divisor imply that it is nowhere vanishing?

Elkies' supersingularity theorem in higher dimension

Interesting examples of flasque sheaves?