English

Chow K\"unneth decomposition for \'etale motives

Algebraic Geometry 2024-03-04 v1

Abstract

In the present article we define an integral analogue of Chow-K\"unneth decomposition for \'etale motives. By using families of conservative functors we are able to establish a decomposition of the \'etale motive of commutative group schemes over a base and we relate to an integral \'etale Chow-K\"unneth decomposition of abelian varieties. For a projective variety XX of dimension dd over an algebraically closed field, we construct integral sub-motives heˊt1(X)h^1_{\text{\'et}}(X) and heˊt2d1(X)h^{2d-1}_{\text{\'et}}(X) of the motive heˊt(X)h_{\text{\'et}}(X).

Keywords

Cite

@article{arxiv.2403.00159,
  title  = {Chow K\"unneth decomposition for \'etale motives},
  author = {Ivan Rosas-Soto},
  journal= {arXiv preprint arXiv:2403.00159},
  year   = {2024}
}
R2 v1 2026-06-28T15:05:20.907Z