Minimal model program for algebraically integrable foliations on klt varieties

Abstract For log canonical (lc) algebraically integrable foliations on Kawamata log terminal (klt) varieties, we prove the base-point-freeness theorem, the contraction theorem, and the existence of flips. The first result resolves a conjecture of Cascini and Spicer, while the latter two results strengthen a result of Cascini and Spicer by removing their assumption on the termination of flips. Moreover, we prove the existence of the minimal model program for lc algebraically integrable foliations on klt varieties and the existence of good minimal models or Mori fiber spaces for lc algebraically integrable foliations polarized by ample divisors on klt varieties. As a consequence, we show that $\mathbb{Q}$ -factorial klt varieties with lc algebraically integrable Fano foliation structures are Mori dream spaces. We also show the existence of a Shokurov-type polytope for lc algebraically integrable foliations.

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Publication Details

Journal
Compositio Mathematica
Published
2025-12-01
DOI
https://doi.org/10.1112/s0010437x25102807
Primary Topic
Polynomial and algebraic computation
Type
article
Field-Weighted Citation Impact
0.00
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Minimal model program for algebraically integrable foliations on klt varieties

Jiayi Liu, Fanjun Meng, Lingyao Xie
Compositio Mathematica
Polynomial and algebraic computation
article

Minimal model program for algebraically integrable foliations on klt varieties

Jiayi Liu, Fanjun Meng, Lingyao Xie
article en

Abstract

Abstract For log canonical (lc) algebraically integrable foliations on Kawamata log terminal (klt) varieties, we prove the base-point-freeness theorem, the contraction theorem, and the existence of flips. The first result resolves a conjecture of Cascini and Spicer, while the latter two results strengthen a result of Cascini and Spicer by removing their assumption on the termination of flips. Moreover, we prove the existence of the minimal model program for lc algebraically integrable foliations on klt varieties and the existence of good minimal models or Mori fiber spaces for lc algebraically integrable foliations polarized by ample divisors on klt varieties. As a consequence, we show that $\mathbb{Q}$ -factorial klt varieties with lc algebraically integrable Fano foliation structures are Mori dream spaces. We also show the existence of a Shokurov-type polytope for lc algebraically integrable foliations.

Compositio MathematicaVol. 161(12)
Johns Hopkins University (US), Peking University (CN), University of California System (US)
Openalex Percentile: Top 21%
Polynomial and algebraic computation
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