English

Derivator Six-Functor-Formalisms -- Construction II

Algebraic Geometry 2022-04-07 v3 Category Theory

Abstract

Starting from simple and necessary axioms on a (derivator enhanced) four-functor-formalism, we construct derivator six-functor-formalisms using compactifications. This works, for instance, for the stable homotopy categories of Morel-Voevodsky-Ayoub, and also for the classical setting of unbounded complexes of sheaves of Abelian groups on `nice' topological spaces. The formalism of derivator six-functor-formalisms elegantly encodes all isomorphisms between compositions of the six functors (and their compatibilities) and moreover it gives coherent enhancements over diagrams of correspondences. Such a formalism allows to extend six-functor-formalisms to stacks using (co)homological descent.

Keywords

Cite

@article{arxiv.1902.03625,
  title  = {Derivator Six-Functor-Formalisms -- Construction II},
  author = {Fritz Hörmann},
  journal= {arXiv preprint arXiv:1902.03625},
  year   = {2022}
}

Comments

completely revised version now including the discussion of main examples

R2 v1 2026-06-23T07:37:02.119Z