Mixed Motives
arXiv:2501.14106 · doi:10.1016/j.indag.2025.03.002
Abstract
A mixed Weil cohomology with values in an abelian rigid tensor category is a cohomological functor on Voevodsky's category of motives which is satisfying Künneth formula and such that its restriction to Chow motives is a Weil cohomology. We show that the universal mixed Weil cohomology exists. Nori motives can be recovered as a universal enrichment of Betti cohomology via a localisation. This new picture is drawing some consequences with respect to the theory of mixed motives in arbitrary characteristic.
References in corpus (9)
- Weight structures vs. -structures; weight filtrations, spectral sequences, and complexes (for motives and in general)
- Mixed Weil cohomologies
- Differential graded motives: weight complex, weight filtrations and spectral sequences for realizations; Voevodsky vs. Hanamura
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- Tensor structure for Nori motives
- Tensor product of motives via Künneth formula
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- Motivic periods and Grothendieck arithmetic invariants