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arXiv 2103.07926math.DSmath.CV
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有限轨道局部自同态的一个不动点曲线定理

A fixed point curve theorem for finite orbits local diffeomorphisms

Lucivanio Lisboa, Javier Ribón

摘要:

我们研究了在原点的某个邻域内具有有限轨道的局部双全纯,因为它们与具有闭叶的全纯叶理密切相关。我们描述的结构的一组周期点在2维。作为结果,我们表明,给定一个局部双全纯$F$,在2维有限轨道,存在一个解析曲线通过原点,并包含在$F.$的一些非平凡点的不动点集作为应用,我们得到的线性部分的至少一个特征值$F$在原点是一个单位根。此外,我们表明,这样的结果是尖锐的展示本地双全纯的例子,有限的轨道,这样的特征值之一是一个单位根。这些例子是微妙的,因为我们表明他们不能嵌入在一个参数组。

英文摘要:

We study local biholomorphisms with finite orbits in some neighborhood of the origin since they are intimately related to holomorphic foliations with closed leaves. We describe the structure of the set of periodic points in dimension 2. As a consequence we show that given a local biholomorphism $F$, in dimension 2 with finite orbits, there exists an analytic curve passing through the origin and contained in the fixed point set of some non-trivial iterate of $F.$ As an application we obtain that at least one eigenvalue of the linear part of $F$ at the origin is a root of unity. Moreover, we show that such a result is sharp by exhibiting examples of local biholomorphisms, with finite orbits, such that exactly one of the eigenvalues is a root of unity. These examples are subtle since we show they can not be embedded in one parameter groups.

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