Universal Weil cohomology
Algebraic Geometry
2025-02-04 v3 Category Theory
K-Theory and Homology
Number Theory
Abstract
We construct a new Weil cohomology for smooth projective varieties over a field, universal among Weil cohomologies with values in rigid additive tensor categories. A similar universal problem for Weil cohomologies with values in rigid abelian tensor categories also has a solution. We give a variant for Weil cohomologies satisfying more axioms, like Weak and Hard Lefschetz. As a consequence, we get a different construction of Andr\'e's category of motives for motivated correspondences and show that it has a universal property. This theory extends over suitable bases.
Cite
@article{arxiv.2401.14127,
title = {Universal Weil cohomology},
author = {L. Barbieri-Viale and B. Kahn},
journal= {arXiv preprint arXiv:2401.14127},
year = {2025}
}
Comments
Exposition improved