Numerical characterization of complex torus quotients
Algebraic Geometry
2023-01-02 v2 Complex Variables
Differential Geometry
Abstract
This article gives a characterization of quotients of complex tori by finite groups acting freely in codimension two in terms of a numerical vanishing condition on the first and second Chern class. This generalizes results previously obtained by Greb--Kebekus--Peternell in the projective setting, and by Kirschner and the second author in dimension three. As a key ingredient to the proof, we obtain a version of the Bogomolov--Gieseker inequality for stable sheaves on singular spaces, including a discussion of the case of equality.
Cite
@article{arxiv.2109.06738,
title = {Numerical characterization of complex torus quotients},
author = {Benoît Claudon and Patrick Graf and Henri Guenancia},
journal= {arXiv preprint arXiv:2109.06738},
year = {2023}
}
Comments
26 pages, v2: exposition improved thanks to the referee's suggestions, added Proposition 3.5 in the semistable case, to appear in Comment. Math. Helv