Voevodsky's motives and Weil reciprocity

Bruno Kahn (1) , Takao Yamazaki (2)

1 IMJ - Institut de Mathématiques de Jussieu
2 Institute of Mathematics

We describe Somekawa's K-group associated to a finite collection of semi-abelian varieties (or more general sheaves) in terms of the tensor product in Voevodsky's category of motives. While Somekawa's definition is based on Weil reciprocity, Voevodsky's category is based on homotopy invariance. We apply this to explicit descriptions of certain algebraic cycles.

Domaines: Géométrie algébrique [math.AG]

Bruno Kahn, Takao Yamazaki. Voevodsky's motives and Weil reciprocity. Duke Mathematical Journal, 2013, 162 (14), pp.2751-2796. ⟨10.1215/00127094-2381379⟩. ⟨hal-00614603v2⟩