Cone theorem and Mori hyperbolicity

We discuss the cone theorem for quasi-log schemes and the Mori hyperbolicity. In particular, we establish that the log canonical divisor of a Mori hyperbolic projective normal pair is nef if it is nef when restricted to the non-lc locus. This answers Svaldi's question completely. We also treat the uniruledness of the degenerate locus of an extremal contraction morphism for quasi-log schemes. Furthermore, we prove that every fiber of a relative quasi-log Fano scheme is rationally chain connected modulo the non-qlc locus.

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Publication Details

Journal
Journal of Differential Geometry
Published
2025-02-28
DOI
https://doi.org/10.4310/jdg/1740136781
Citations
3
Primary Topic
Mathematics and Applications
Type
article
Field-Weighted Citation Impact
12.26
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article

Cone theorem and Mori hyperbolicity

Osamu Fujino
3 citations
Journal of Differential Geometry
Mathematics and Applications
12.26
article

Cone theorem and Mori hyperbolicity

Osamu Fujino
article en
3 citations

Abstract

We discuss the cone theorem for quasi-log schemes and the Mori hyperbolicity. In particular, we establish that the log canonical divisor of a Mori hyperbolic projective normal pair is nef if it is nef when restricted to the non-lc locus. This answers Svaldi's question completely. We also treat the uniruledness of the degenerate locus of an extremal contraction morphism for quasi-log schemes. Furthermore, we prove that every fiber of a relative quasi-log Fano scheme is rationally chain connected modulo the non-qlc locus.

Journal of Differential GeometryVol. 129(3)
Kyoto University (JP)
Openalex Percentile: Top 2%
Mathematics and Applications
12.26
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Cone theorem and Mori hyperbolicity — Osamu Fujino · Journal of Differential Geometry (2025) | TGRS Research Map | TGRS