English

Atiyah duality for motivic spectra

Algebraic Geometry 2024-03-05 v1 Algebraic Topology K-Theory and Homology

Abstract

We prove that Atiyah duality holds in the \infty-category of non-A1\mathbb A^1-invariant motivic spectra over arbitrary derived schemes: every smooth projective scheme is dualizable with dual given by the Thom spectrum of its negative tangent bundle. The Gysin maps recently constructed by L. Tang are a key ingredient in the proof. We then present several applications. First, we study A1\mathbb A^1-colocalization, which transforms any module over the A1\mathbb A^1-invariant sphere into an A1\mathbb A^1-invariant motivic spectrum without changing its values on smooth projective schemes. This can be applied to all known pp-adic cohomology theories and gives a new elementary approach to "logarithmic" or "tame" cohomology theories; it recovers for instance the logarithmic crystalline cohomology of strict normal crossings compactifications over perfect fields and shows that the latter is independent of the choice of compactification. Second, we prove a motivic Landweber exact functor theorem, associating a motivic spectrum to any graded formal group law classified by a flat map to the moduli stack of formal groups. Using this theorem, we compute the ring of P1\mathbb P^1-stable cohomology operations on the algebraic K-theory of qcqs derived schemes, and we prove that rational motivic cohomology is an idempotent motivic spectrum.

Keywords

Cite

@article{arxiv.2403.01561,
  title  = {Atiyah duality for motivic spectra},
  author = {Toni Annala and Marc Hoyois and Ryomei Iwasa},
  journal= {arXiv preprint arXiv:2403.01561},
  year   = {2024}
}

Comments

47 pages. Comments welcome!

R2 v1 2026-06-28T15:07:38.034Z