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arXiv 1502.07138math.AG
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射影平面曲线Milnor和的GIT界

A bound for the Milnor sum of projective plane curves in terms of GIT

Jaesun Shin

摘要:

设$C$是$d$次的射影平面曲线,其奇点都是孤立的.假设$C$不是并发行。Pestioski证明了$C$的孤立奇点的Milnor数小于等于$(d-1)^{2}-\lfloor \frac{d}{2} \rfloor$ .本文证明了$C$的Milnor和也小于或等于$(d-1)^{2}-\lfloor \frac{d}{2} \rfloor$,且等式成立当且仅当$C$是Pesthoski曲线.此外,我们还得到了射影平面曲线的Milnor和的GIT界。

英文摘要:

Let $C$ be a projective plane curve of degree $d$ whose singularities are all isolated. Suppose $C$ is not concurrent lines. Płoski proved that the Milnor number of an isolated singlar point of $C$ is less than or equal to $(d-1)^{2}-\lfloor \frac{d}{2} \rfloor$. In this paper, we prove that the Milnor sum of $C$ is also less than or equal to $(d-1)^{2}-\lfloor \frac{d}{2} \rfloor$ and the equality holds if and only if $C$ is a Płoski curve. Furthermore, we find a bound for the Milnor sum of projective plane curves in terms of GIT.

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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