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arXiv 0911.3607math.AG
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与Weyl腔和Losev-Manin模空间相关的环面簇的函子

The functor of toric varieties associated with Weyl chambers and Losev-Manin moduli spaces

Victor Batyrev, Mark Blume

摘要:

秩为$n$的根系$R$定义了一个$n$维光滑射影复曲面簇$X(R)$,该簇与其Weyl腔的扇形相关联.我们给出了$X(R)$的函子在根系$R$方面的一个简单描述,并将这个结果应用于$A$型根系的情况,给出了一个新的证明,证明了复曲面簇$X(A_n)$是Losev和Manin研究的投射线的稳定$(n+1)$ -点链的细模空间$\bar{L}_{n+1}$。

英文摘要:

A root system $R$ of rank $n$ defines an $n$-dimensional smooth projective toric variety $X(R)$ associated with its fan of Weyl chambers. We give a simple description of the functor of $X(R)$ in terms of the root system $R$ and apply this result in the case of root systems of type $A$ to give a new proof of the fact that the toric variety $X(A_n)$ is the fine moduli space $\bar{L}_{n+1}$ of stable $(n+1)$-pointed chains of projective lines investigated by Losev and Manin.

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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