English

The passage among the subcategories of weakly approximable triangulated categories

Algebraic Geometry 2024-02-08 v1 Category Theory Representation Theory

Abstract

In this article we prove that all the inclusions between the 'classical' and naturally defined full triangulated subcategories of a weakly approximable triangulated category are intrinsic (in one case under a technical condition). This extends all the existing results about subcategories of weakly approximable triangulated categories. Together with a forthcoming paper about uniqueness of enhancements, our result allows us to generalize a celebrated theorem by Rickard which asserts that if RR and SS are left coherent rings, then a derived equivalence of RR and SS is "independent of the decorations". That is, if D?(R-)D^?(R\text{-}\square) and D?(S-)D^?(S\text{-}\square) are equivalent as triangulated categories for some choice of decorations ?? and \square, then they are equivalent for every choice of decorations. But our theorem is much more general, and applies also to quasi-compact and quasi-separated schemes -- even to the relative version, in which the derived categories consist of complexes with cohomology supported on a given closed subscheme with quasi-compact complement.

Keywords

Cite

@article{arxiv.2402.04605,
  title  = {The passage among the subcategories of weakly approximable triangulated categories},
  author = {Alberto Canonaco and Christian Haesemeyer and Amnon Neeman and Paolo Stellari},
  journal= {arXiv preprint arXiv:2402.04605},
  year   = {2024}
}

Comments

Main paper by Alberto Canonaco, Amnon Neeman and Paolo Stellari with an appendix by Christian Haesemeyer. 65 pages