Albanese varieties with modulus over a perfect field

Details Albanese varieties with modulus over a perfect field Albanese varieties with modulus over a perfect field

2009-02-15

arxiv.org/abs/0902.2533v2

Mathematics

Algebraic Geometry

completely new paper, containing "1-motives with unipotent part"

Scientific paper

Let X be a smooth proper variety over a perfect field k of arbitrary characteristic. Let D be an effective divisor on X with multiplicity. We introduce an Albanese variety Alb(X, D) of X of modulus D as a higher dimensional analogon of the generalized Jacobian of Rosenlicht-Serre with modulus for smooth proper curves. Basing on duality of 1-motives with unipotent part (which are introduced here), we obtain explicit and functorial descriptions of these generalized Albanese varieties and their dual functors. We define a relative Chow group of zero cycles w.r.t. the modulus D and show that Alb(X, D) is a universal quotient of this Chow group. As an application we can rephrase Lang's class field theory of function fields of varieties over finite fields in explicit terms.

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