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arXiv 2510.04419math.AGmath.DS
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非丰裕叶状结构的非代数性及伴随叶状结构的丰裕性

Non-algebraicity of non-abundant foliations and abundance for adjoint foliated structures

Jihao Liu, Zheng Xu

AI总结:

本文在丰裕猜想下建立叶状结构非代数性判据,证明伴随叶状结构的丰裕性及良好极小模型存在性,并解决曲面情形问题。

摘要:

假设维度$d$的丰裕猜想成立,我们建立了叶状结构的非代数性判据:任何秩$\le d$且满足$\nu\neq\kappa$的对数典范叶状结构都不是代数可积的,回答了Ambro--Cascini--Shokurov--Spicer的问题。在同一假设下,我们证明了维度$\le d$的klt代数可积伴随叶状结构的丰裕性,并展示了良好极小模型或Mori纤维空间的存在性。特别地,当$d=3$时,所有这些结果无条件成立。利用类似论证,我们解决了Lu和Wu提出的关于不一定代数可积的曲面伴随叶状结构丰裕性的问题。

英文摘要:

Assuming the abundance conjecture in dimension $d$, we establish a non-algebraicity criterion of foliations: any log canonical foliation of rank $\le d$ with $ν\neqκ$ is not algebraically integrable, answering question of Ambro--Cascini--Shokurov--Spicer. Under the same hypothesis, we prove abundance for klt algebraically integrable adjoint foliated structures of dimension $\le d$ and show the existence of good minimal models or Mori fiber spaces. In particular, when $d=3$, all these results hold unconditionally. Using similar arguments, we solve a problem proposed by Lu and Wu on abundance of surface adjoint foliated structures that are not necessarily algebraically integrable.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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