Minimal projective varieties satisfying Miyaoka's equality

Abstract In this paper, we establish a structure theorem for a minimal projective klt variety satisfying Miyaoka's equality . Specifically, we prove that the canonical divisor is semi‐ample and that the Kodaira dimension is equal to 0, 1, or 2. Furthermore, based on this abundance result, we show that a maximally quasi‐étale cover of is smooth, and we explicitly describe the structure of the Iitaka fibration. In addition, we prove an analogous result for projective klt varieties with numerically effective anti‐canonical divisor.

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Publication Details

Journal
Proceedings of the London Mathematical Society
Published
2025-12-01
DOI
https://doi.org/10.1112/plms.70104
Primary Topic
Algebraic Geometry and Number Theory
Type
article
Field-Weighted Citation Impact
0.00
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article

Minimal projective varieties satisfying Miyaoka's equality

Masataka Iwai, Shin‐ichi Matsumura, Niklas Müller
Proceedings of the London Mathematical Society
Algebraic Geometry and Number Theory
article

Minimal projective varieties satisfying Miyaoka's equality

Masataka Iwai, Shin‐ichi Matsumura, Niklas Müller
article en

Abstract

Abstract In this paper, we establish a structure theorem for a minimal projective klt variety satisfying Miyaoka's equality . Specifically, we prove that the canonical divisor is semi‐ample and that the Kodaira dimension is equal to 0, 1, or 2. Furthermore, based on this abundance result, we show that a maximally quasi‐étale cover of is smooth, and we explicitly describe the structure of the Iitaka fibration. In addition, we prove an analogous result for projective klt varieties with numerically effective anti‐canonical divisor.

Proceedings of the London Mathematical SocietyVol. 131(6)
Osaka University of Economics (JP), Tohoku University (JP), University of Duisburg-Essen (DE), The University of Osaka (JP)
Openalex Percentile: Top 56%
Algebraic Geometry and Number Theory
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