English

Every motive is the motive of a stable $\infty$-category

K-Theory and Homology 2025-03-17 v1 Algebraic Topology Category Theory

Abstract

We define a class of motivic equivalences of small stable \infty-categories WmotW_{\mathrm{mot}} and show that the Dwyer--Kan localization functor CatperfCatperf[Wmot1]\mathrm{Cat}^{\mathrm{perf}}_\infty \to \mathrm{Cat}^{\mathrm{perf}}_\infty[W_{\mathrm{mot}}^{-1}] is the universal localizing invariant in the sense of Blumberg--Gepner--Tabuada. In particular, we show that every object in its target Mloc\mathcal{M}_{\mathrm{loc}} can be represented as Uloc(C)\mathcal{U}_{\mathrm{loc}}(\mathcal{C}) for some small stable \infty-category C\mathcal{C}. As another consequence, and using work of Efimov, we improve the universal property of Mloc\mathcal{M}_{\mathrm{loc}} and show that any 1\aleph_1-finitary localizing invariant factors uniquely through it.

Keywords

Cite

@article{arxiv.2503.11338,
  title  = {Every motive is the motive of a stable $\infty$-category},
  author = {Maxime Ramzi and Vladimir Sosnilo and Christoph Winges},
  journal= {arXiv preprint arXiv:2503.11338},
  year   = {2025}
}

Comments

31 pages, comments welcome!