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arXiv 2201.08966math.AGmath.CV
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关于典范维数为n-1的极小n-叠的有理双几何显式研究

On explicit birational geometry for minimal n-folds of canonical dimension n-1

Meng Chen, Louis Esser, Chengxi Wang

AI总结:

本文研究了典范纤维化极小射影n-叠的典范体积下界与稳定性指数上界,证明了$i=1$时的具体最优值公式,并指出该方法适用于所有典范维数。

摘要:

设$n\geq 2$为任意整数。我们研究典范纤维化为i-叠($i=0,1$)的一般型极小射影n-叠的典范体积最优下界$v_{n,n-i}$与典范稳定性指数最优上界$r_{n,n-i}$。$i=0$时的结果$v_{n,n}=2$和$r_{n,n}=n+2$已为专家所知。本文证明$v_{n,n-1}=\frac{6}{2n+(n \bmod 3)}$且$r_{n,n-1}=\frac{1}{3}(5n+3+(n \bmod 3))$。该机制适用于所有典范维数$n-i$。

英文摘要:

Let $n\geq 2$ be any integer. We study the optimal lower bound $v_{n, n-i}$ of the canonical volume and the optimal upper bound $r_{n,n-i}$ of the canonical stability index for minimal projective $n$-folds of general type, which are canonically fibered by $i$-folds ($i=0,1$). The results for $i = 0$, $v_{n,n}=2$ and $r_{n, n}=n+2$, are known to experts. In this article, we show that $v_{n,n-1}=\frac{6}{2n+(n \bmod 3)}$ and $r_{n,n-1}=\frac{1}{3}(5n+ 3 + (n \bmod 3))$. The machinery is applicable to all canonical dimensions $n-i$.

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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