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arXiv 0905.1430math.AG
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环面簇的强有理连通性

Strong rational connectedness of toric varieties

Yifei Chen, Vyacheslav Shokurov

摘要:

本文证明了:对于不可数(特征为0)代数闭域上的完备复曲面簇中任意给定的n个相异点$P_1,...,P_r$和余维$\geq 2$的闭子簇$S$,存在一条通过$P_1,...,P_r$的有理曲线$f:\mathbb{P}^1\to X$,它与$S\setminus \{P_1,...,P_r\}$不相交(见主要定理).作为推论,我们证明了完备复曲面簇的光滑轨迹是强有理连通的。

英文摘要:

In this paper, we prove that: For any given finitely many distinct points $P_1,...,P_r$ and a closed subvariety $S$ of codimension $\geq 2$ in a complete toric variety over a uncountable (characteristic 0) algebraically closed field, there exists a rational curve $f:\mathbb{P}^1\to X$ passing through $P_1,...,P_r$, disjoint from $S\setminus \{P_1,...,P_r\}$ (see Main Theorem). As a corollary, we prove that the smooth loci of complete toric varieties are strongly rationally connected.

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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