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- W1622013983 abstract "We study Weil-etale cohomology, introduced by Lichtenbaum for varieties over finite fields. In the first half of the paper we give an explicit description of the base change from Weil-etale cohomology to etale cohomology. As a consequence, we get a long exact sequence relating Weil-etale cohomology to etale cohomology, show that for finite coefficients the cohomology theories agree, and with rational coefficients a Weil-etale cohomology group is the direct sum of two etale cohomology groups. In the second half of the paper we restrict ourselves to Weil-etale cohomology of the motivic complex. We show that for smooth projective varieties over finite fields, finite generation of Weil-etale cohomology is equivalent to Weil-etale cohomology being an integral model of l-adic cohomology, and also equivalent to the conjunction of Tate's conjecture and (rational) equality of rational and numerical equivalence. We give several examples where these conjectures hold, and express special values of zeta functions in terms of Weil-etale cohomology." @default.
- W1622013983 created "2016-06-24" @default.
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- W1622013983 date "2002-05-23" @default.
- W1622013983 modified "2023-09-27" @default.
- W1622013983 title "Weil-etale motivic cohomology" @default.
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