2011/09/10 by Teruyoshi Yoshida, Yoshida, Teruyoshi
Mathematics · #Advanced Algebra and Geometry #Algebraic Geometry and Number Theory #Commutative Algebra and Its Applications #math.AG #math.NT
paper · pdf · doi:10.48550/arxiv.1109.2208
14 pages
arxiv created 2011/09/10 · arxiv updated 2011/09/13
In a work of T. Saito, the action of algebraic correspondences on the etale cohomology of varieties over local fields with semistable reduction is related to correspondences on smaller strata via weight spectral sequences. We give an intersection theoretic construction of these correspondences. Under a finiteness condition this enables us to compute them without involving the blow-ups of products, and prove their compatibility with compositions. These features are essential for the application to Shimura varieties.