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arXiv 1409.4449math.DSmath.CV
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关于C^2的多项式自同构的稳定性和双曲性

On stability and hyperbolicity for polynomial automorphisms of C^2

Pierre Berger, Romain Dujardin

摘要:

设$(f_λ)_{λ\in Λ}$是$\mathbb{C}^2$的多项式自同构的全纯族.根据Dujardin和Lyubich以前的工作,我们说,这样的家庭是弱稳定的,如果鞍周期轨道不分叉。这个性质是否等价于朱利亚集$J^*$上的结构稳定性(即鞍周期点集的闭包)是一个悬而未决的问题。本文受Pesin理论的启发,引入了多项式自同构的正则点的概念,并证明了在弱稳定族中,正则点的集合是全纯移动的.由此可见,弱稳定的家族在概率上是结构稳定的,在很强的意义上。这些技术的另一个结果是弱稳定性保持$J^*$上的一致双曲性。

英文摘要:

Let $(f_λ)_{λ\in Λ}$ be a holomorphic family of polynomial automorphisms of $\mathbb{C}^2$. Following previous work of Dujardin and Lyubich, we say that such a family is weakly stable if saddle periodic orbits do not bifurcate. It is an open question whether this property is equivalent to structural stability on the Julia set $J^*$ (that is, the closure of the set of saddle periodic points). In this paper we introduce a notion of regular point for a polynomial automorphism, inspired by Pesin theory, and prove that in a weakly stable family, the set of regular points moves holomorphically. It follows that a weakly stable family is probabilistically structurally stable, in a very strong sense. Another consequence of these techniques is that weak stability preserves uniform hyperbolicity on $J^*$.

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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