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arXiv 1101.3797math.AG
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完全相交的有理曲线空间

Spaces of rational curves in complete intersections

Roya Beheshti, N. Mohan Kumar

摘要:

证明了当$\sum_{i=1}^m d_i <\frac{2n}{3}$和$n$足够大时,$e$在$\PP^n$中的多次$(d_1, ..., d_m)$的一般完全交中的光滑有理曲线的空间是期望维数不可约的.这推广了Harris,Roth和Starr \cite{hrs}的结果,并通过证明如果$\sum_{i=1}^m d_i$比$n$小,则通过一般完全相交的任何点的二次曲线的空间具有常数维数来实现。

英文摘要:

We prove that the space of smooth rational curves of degree $e$ in a general complete intersection of multidegree $(d_1, ..., d_m)$ in $\PP^n$ is irreducible of the expected dimension if $\sum_{i=1}^m d_i <\frac{2n}{3}$ and $n$ is large enough. This generalizes the results of Harris, Roth and Starr \cite{hrs}, and is achieved by proving that the space of conics passing through any point of a general complete intersection has constant dimension if $\sum_{i=1}^m d_i$ is small compared to $n$.

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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