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Preprints, Working Papers, ... Year : 2020

Milnor-Witt Motives

Tom Bachmann
  • Function : Author
Baptiste Calmès
Frédéric Déglise
Jean Fasel
Paul Arne Østvær
  • Function : Author

Abstract

We develop the theory of Milnor-Witt motives and motivic cohomology. Compared to Voevodsky's theory of motives and his motivic cohomology, the first difference appears in our definition of Milnor-Witt finite correspondences, where our cycles come equipped with quadratic forms. This yields a weaker notion of transfers and a derived category of motives that is closer to the stable homotopy theory of schemes. We prove a cancellation theorem when tensoring with the Tate object, we compare the diagonal part of our Milnor-Witt motivic cohomology to Minor-Witt K-theory and we provide spectra representing various versions of motivic cohomology in the $\mathbb{A}^1$-derived category or the stable homotopy category of schemes.

Dates and versions

hal-02942568 , version 1 (18-09-2020)

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Tom Bachmann, Baptiste Calmès, Frédéric Déglise, Jean Fasel, Paul Arne Østvær. Milnor-Witt Motives. 2020. ⟨hal-02942568⟩

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