Minimal projective varieties satisfying Miyaoka's equality
Abstract
In this paper, we establish a structure theorem for minimal projective klt varieties that satisfiy Miyaoka's equality . Specifically, we prove that the canonical divisor is semi-ample and that the Kodaira dimension is either , , or . Furthermore, based on this abundance result, we show that a maximally quasi-\'etale cover of is smooth, and we describe explicitly the structure of the Iitaka fibration. Additionally, we prove a similar result for projective klt varieties with a nef anti-canonical divisor.
Cite
@article{arxiv.2404.07568,
title = {Minimal projective varieties satisfying Miyaoka's equality},
author = {Masataka Iwai and Shin-ichi Matsumura and Niklas Müller},
journal= {arXiv preprint arXiv:2404.07568},
year = {2025}
}
Comments
v4: 38pages. Subsection 4.2 and Section 6 in the previous version have been revised, and Section 5 has been removed. To appear in Proceedings of the London Mathematical Society. v3: 38pages; The title was changed; the main result was improved. v2: 33pages; minor revison. v1: 3 pages; comments are welcome