Symmetric monoidal structure on Non-commutative motives

Details Symmetric monoidal structure on Non-commutative motives Symmetric monoidal structure on Non-commutative motives

2010-01-03

arxiv.org/abs/1001.0228v2

Mathematics

K-Theory and Homology

Revised according to Kontsevich's comments. 56 pages

Scientific paper

In this article we further the study of non-commutative motives. Our main result is the construction of a symmetric monoidal structure on the localizing motivator Mot of dg categories. As an application, we obtain : (1) a computation of the spectra of morphisms in Mot in terms of non-connective algebraic K-theory; (2) a fully-faithful embedding of Kontsevich's category KMM of non-commutative mixed motives into the base category Mot(e) of the localizing motivator; (3) a simple construction of the Chern character maps from non-connective algebraic K-theory to negative and periodic cyclic homology; (4) a precise connection between Toen's secondary K-theory and the Grothendieck ring of KMM ; (5) a description of the Euler characteristic in KMM in terms of Hochschild homology.

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