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arXiv 1810.04563math.AG
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扭曲三次曲面与三次曲面上的四重点

Twisted cubics and quadruples of points on cubic surfaces

Pavel Popov

摘要:

本文研究了三次超曲面$Y$上点的Hilbert格式与$Y$上扭三次曲线的模空间之间的簇的Grothendieck环中的关系。这些关系是“美丽的”$Y$ - $F(Y)$的Galkin和Shinder关系的推广,它将$Y$与$Y$上两点的Hilbert方案和$Y$上线条的Fano簇$F(Y)$连接起来。我们主要集中于三次曲面的情形。光滑三次曲面上的$27$线的对称性对这些关系的可能形式给出了许多限制。

英文摘要:

We study relations in the Grothendieck ring of varieties which connect the Hilbert scheme of points on a cubic hypersurface $Y$ with a certain moduli space of twisted cubic curves on $Y$. These relations are generalizations of the "beautiful" $Y$-$F(Y)$ relation by Galkin and Shinder which connects $Y$ with the Hilbert scheme of two points on $Y$ and the Fano variety $F(Y)$ of lines on $Y$. We concentrate mostly on the case of cubic surfaces. The symmetries of $27$ lines on a smooth cubic surface give a lot of restrictions on possible forms of the relations.

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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