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arXiv 1002.1578math.AGmath.AC
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关于线性正态曲线的X秩

On the X-rank with respect to linearly normal curves

Edoardo Ballico, Alessandra Bernardi

摘要:

本文研究了$g$亏格的线性光滑正态曲线$X\subset \PP n$和度$n+g$上点的$X$秩.我们证明了,对于这样的曲线$X$,在一定的情况下,$X$ -边界秩等于$s$的一般点的$X$ -秩小于或等于$n+1-s$。在特定的情况下,$g=2$,我们给一个完整的描述$X$ -秩,如果$n=3,4$ ;而如果$n\geq 5$,我们研究的$X$ -秩的点属于切线品种的$X$。

英文摘要:

In this paper we study the $X$-rank of points with respect to smooth linearly normal curves $X\subset \PP n$ of genus $g$ and degree $n+g$. We prove that, for such a curve $X$, under certain circumstances, the $X$-rank of a general point of $X$-border rank equal to $s$ is less or equal than $n+1-s$. In the particular case of $g=2$ we give a complete description of the $X$-rank if $n=3,4$; while if $n\geq 5$ we study the $X$-rank of points belonging to the tangential variety of $X$.

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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