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An inseparable lift of a regular variety.

characteristic-p ag.algebraic-geometry

jan 14 11 at 12:35 Laurent Moret-Bailly 7,276●19●29

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The fibres of smooth projective families over all geometric points have isomorphic cohomology; are these isomorphisms ‘functorial’?

ag.algebraic-geometry etale-cohomology reference-request

jan 6 at 3:32 David Corwin 6,730●23●56

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Some ‘weak proper and smooth base change’ theorems for Nisnevich sheaves?

ag.algebraic-geometry nisnevich-topology etale-cohomology

jan 9 at 10:27 Mikhail Bondarko 5,876●1●4●21

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How would you call a subscheme of a smooth $S$-scheme?

ag.algebraic-geometry schemes terminology

feb 23 at 8:35 Mikhail Bondarko 5,876●1●4●21

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On ‘special properties’ of various ‘sheaf image’ functors for a local complete intersection morphism

etale-cohomology ag.algebraic-geometry reference-request

sep 22 11 at 9:32 Mikhail Bondarko 5,876●1●4●21

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On the cohomology of G_m-bundles and purity for singular varieties

ag.algebraic-geometry at.algebraic-topology cohomology etale-cohomology

mar 21 12 at 11:22 MathOverflow♦ 1●2●3

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Lefschetz fixed point formula: an ‘easy’ proof; cohomology with compact support

etale-cohomology ag.algebraic-geometry at.algebraic-topology reference-request

sep 9 at 13:18 Steven Landsburg 8,499●1●27●47

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Sommese’s theorem (generalized Weak Lefschetz) in arbitrary characteristic?

ag.algebraic-geometry positivity vector-bundles ample-bundles etale-cohomology

oct 14 at 10:21 Angelo 19.4k●3●47●75