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arXiv 1006.0987math.AG
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$\overline{M}_{0,n}$的自同构群

The automorphisms group of $\overline{M}_{0,n}$

Andrea Bruno, Massimiliano Mella

摘要:

本文研究了点有理曲线模空间之间的纤维型态射。通过Kapranov的描述,我们能够证明,只有这样的态射是健忘地图。这使我们能够证明$\overline{M}_{0,n}$的自同构群是$n$元素上的置换群,只要$n\geq 5$。

英文摘要:

In this paper we study fiber type morphisms between moduli spaces of pointed rational curves. Via Kapranov's description we are able to prove that the only such morphisms are forgetful maps. This allow us to show that the Automorphism group of $\overline{M}_{0,n}$ is the permutation group on $n$ elements as soon as $n\geq 5$.

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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