English

Dualizability of derived categories of algebraic stacks

Algebraic Geometry 2025-09-18 v1

Abstract

We show that, for a Noetherian algebraic stack with quasi-affine diagonal XX, the stable \infty-category of quasi-coherent sheaves on XX is dualizable if and only if the reduced identity component of the stabilizer of XX at every geometric point of positive characteristic is a torus. Along the way, we show that this condition on stabilizers is also equivalent to an array of other categorical conditions of interest.

Keywords

Cite

@article{arxiv.2509.14231,
  title  = {Dualizability of derived categories of algebraic stacks},
  author = {Germán Stefanich},
  journal= {arXiv preprint arXiv:2509.14231},
  year   = {2025}
}