In mathematics, crystalline cohomology is a Weil cohomology theory for schemes X over a base field k. Its values H (X/W) are modules over the ring W of Witt vectors over k. It was introduced by Alexander Grothendieck (1966, 1968) and developed by Pierre Berthelot (1974). Crystalline cohomology is partly inspired … See more For schemes in characteristic p, crystalline cohomology theory can handle questions about p-torsion in cohomology groups better than p-adic étale cohomology. This makes it a natural backdrop for much of the work on See more In characteristic p the most obvious analogue of the crystalline site defined above in characteristic 0 does not work. The reason is roughly that in order to prove exactness of the de Rham complex, one needs some sort of Poincaré lemma, whose proof in turn … See more • Motivic cohomology • De Rham cohomology See more For a variety X over an algebraically closed field of characteristic p > 0, the $${\displaystyle \ell }$$-adic cohomology groups for See more One idea for defining a Weil cohomology theory of a variety X over a field k of characteristic p is to 'lift' it to a variety X* over the ring of Witt … See more If X is a scheme over S then the sheaf OX/S is defined by OX/S(T) = coordinate ring of T, where we write T as an abbreviation for an object U → T of Cris(X/S). A crystal on the site Cris(X/S) is a sheaf F of OX/S modules … See more Webetale cohomology: a short introduction. Xavier Xarles Preliminary Version Introduction The p-adic comparison theorems (or the p-adic periods isomorphisms) are isomorphisms, analog to the “complex periods isomorphism” Hi dR(X/C) ∼= Hi(X(C),Q) ⊗C for a smooth and projective variety over C, between the p-adic cohomology
A stacky approach to crystalline (and prismatic) cohomology
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De Rham-Witt Cohomology for a Proper and Smooth …
WebAug 28, 2024 · A crystal structure is defined as the particular repeating arrangement of atoms (molecules or ions) throughout a crystal. Structure refers to the internal … WebCrystalline cohomology was at rst motivated by the search of a cohomology theory analogous to the ‘-adic cohomology for a scheme over a eld of characteristic p, with p6= ‘. In fact, under the assumption ‘6= p, ‘-adic cohomology has a lot of nice properties which become false if we allow ‘= p. 1 WebDec 27, 2024 · cohomology respecting various structures, such as their Frobenius actions and filtrations. As an application, when X is a proper smooth formal scheme over OK with K being a p -adic field, we... curfew sydney airport