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arXiv 0802.1255math.AG
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平面曲线与其补曲线的对应

The correspondence between a plane curve and its complement

Jérémy Blanc

摘要:

给定平面上两条不可约曲线,它们有同构的补曲线,很自然地要问是否存在一个平面的自同构,使一条曲线在另一条曲线上。这个问题有一个肯定的答案为一个大家庭的曲线和H.吉原证实,这是真的一般。在任何基域上,我们给出了这个猜想的反例。在某些情况下,曲线是同构的,而在其他情况下则不是;这提供了两种不同类型的反例。最后,我们使用我们的建设,发现令人惊讶的非线性仿射曲面的自同构的存在。

英文摘要:

Given two irreducible curves of the plane which have isomorphic complements, it is natural to ask whether there exists an automorphism of the plane that sends one curve on the other. This question has a positive answer for a large family of curves and H.Yoshihara conjectured that it is true in general. We exhibit counterexamples to this conjecture, over any ground field. In some of the cases, the curves are isomorphic and in others not; this provides counterexamples of two different kinds. Finally, we use our construction to find the existence of surprising non-linear automorphisms of affine surfaces.

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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