Inequalities of Miyaoka-Yau-type and Uniformisation of Minimal Varieties of intermediate Kodaira Dimension

In this thesis, we prove that the Chern classes of a minimal projective variety X of dimension n and numerical dimension ν always satisfy a certain set of inequalities. In the cases where ν is either very small or very large compared with n, this recovers many previously known results. On the other hand, for intermediate values of ν, our results are completely new. We demonstrate that the inequality we present is sharp by providing an explicit characterisation of those varieties achieving the equality; our proof, in particular, resolves the Abundance conjecture in this situation. Additionally, we provide some new examples of varieties with extremal Chern classes that demonstrate the optimality of our results.

Publication Details

Journal
Universitätsbibliographie, Universität Duisburg-Essen
Published
2025-10-15
DOI
https://doi.org/10.17185/duepublico/84388
Primary Topic
Algebraic Geometry and Number Theory
Type
article
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article

Inequalities of Miyaoka-Yau-type and Uniformisation of Minimal Varieties of intermediate Kodaira Dimension

Universitätsbibliographie, Universität Duisburg-Essen
Algebraic Geometry and Number Theory
article

Inequalities of Miyaoka-Yau-type and Uniformisation of Minimal Varieties of intermediate Kodaira Dimension

article en

Abstract

In this thesis, we prove that the Chern classes of a minimal projective variety X of dimension n and numerical dimension ν always satisfy a certain set of inequalities. In the cases where ν is either very small or very large compared with n, this recovers many previously known results. On the other hand, for intermediate values of ν, our results are completely new. We demonstrate that the inequality we present is sharp by providing an explicit characterisation of those varieties achieving the equality; our proof, in particular, resolves the Abundance conjecture in this situation. Additionally, we provide some new examples of varieties with extremal Chern classes that demonstrate the optimality of our results.

Universitätsbibliographie, Universität Duisburg-Essen
Reduced inequalities
Openalex Percentile: Top 37%
Algebraic Geometry and Number Theory
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