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arXiv 1304.7853math.AGmath.CV
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解析空间上的全纯弧

Holomorphic arcs on analytic spaces

János Kollár, András Némethi

摘要:

设X是复解析空间。短解析弧是闭单位圆盘到X的全纯映射,使得只有原点映射到奇点。与Nash研究的形式弧空间不同,短解析弧的模空间通常有无穷多个连通分支。我们描述这些表面奇点,在某些共轭类的基本群的链接。对于商奇点(在任何维度上),这给出了麦凯对应的具体实现。我们的结果也给出了新的连接之间的表面尖点奇异性,其对偶和双曲井上曲面。版本2:添加了参考文献。

英文摘要:

Let X be a complex analytic space. A short analytic arc is a holomorphic map of the closed unit disc to X such that only the origin is mapped to a singular point. In contrast with the space of formal arcs studied by Nash, the moduli space of short analytic arcs usually has infinitely many connected components. We describe these for surface singularities, in terms of certain conjugacy classes of the fundamental group of the link. For quotient singularities (in any dimension), this gives a concrete realization of the McKay correspondence. Our results also give new connections between a surface cusp singularity, its dual and hyperbolic Inoue surfaces. version 2: References added.

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