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arXiv 1812.04670math.AG
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锥奇点的一个有界性定理

A boundedness theorem for cone singularities

Joaquín Moraga

摘要:

锥奇点是一个正规的仿射簇$X$,它具有一个有效的一维环面作用,作用有一个唯一的不动点$x\in X$,该不动点位于$k^*$ -作用的任何轨道的闭包中。在这篇文章中,我们证明了锥奇点的有界性定理,根据他们的维数,奇性和各向同性。给定$d$和$N$为正整数,$ε$为正实数,我们证明了以$N$为界的$d$-log维各向同性正则锥奇点族构成有界族.

英文摘要:

A cone singularity is a normal affine variety $X$ with an effective one-dimensional torus action with a unique fixed point $x\in X$ which lies in the closure of any orbit of the $k^*$-action. In this article, we prove a boundedness theorem for cone singularities in terms of their dimension, singularities, and isotropies. Given $d$ and $N$ two positive integers and $ε$ a positive real number, we prove that the class of $d$-dimensional $ε$-log canonical cone singularities with isotropies bounded by $N$ forms a bounded family.

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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