English

Orbifold modifications of complex analytic varieties

Algebraic Geometry 2025-12-25 v6 Complex Variables

Abstract

We prove that if XX is a compact complex analytic variety, which has quotient singularities in codimension 2, then there is a projective bimeromorphic morphism f ⁣:YXf\colon Y\to X, such that YY has quotient singularities, and that the indeterminacy locus of f1f^{-1} has codimension at least 3 in XX. As an application, we deduce the Bogomolov-Gieseker inequality on orbifold Chern classes for stable reflexive coherent sheaves on compact K\"ahler varieties which have quotient singularities in codimension 2.

Keywords

Cite

@article{arxiv.2401.07273,
  title  = {Orbifold modifications of complex analytic varieties},
  author = {Wenhao Ou},
  journal= {arXiv preprint arXiv:2401.07273},
  year   = {2025}
}

Comments

The major part of the paper is replaced by the paper "Orbifold modifications of complex analytic spaces" by J\'anos Koll\'ar and Wenhao Ou. The part on Bogomolov-Gieseker inequalities is splitted into a short note

R2 v1 2026-06-28T14:16:20.048Z