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arXiv 1005.2252math.DS
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多项式斜积的Fatou分支的二分法

A dichotomy for Fatou components of polynomial skew products

Roland K. W. Roeder

摘要:

我们考虑形式为f(z,w)=(p(z),q(z,w))的多项式映射,它们扩张为CP ^2的全纯映射。Mattias Jonsson在(Math. Ann.,1999)的概念,这种多项式斜积的连通性是类似的朱利亚集的一个变量的多项式映射的连通性。证明了如下二分法:如果f是公理A多项式斜积,且f是连通的,则f的每个Fatou分支同胚于一个开球;否则,f的某个Fatou分支具有无限生成的第一同调.

英文摘要:

We consider polynomial maps of the form f(z,w) = (p(z),q(z,w)) that extend as holomorphic maps of CP^2. Mattias Jonsson introduces in (Math. Ann., 1999) a notion of connectedness for such polynomial skew products that is analogous to connectivity for the Julia set of a polynomial map in one-variable. We prove the following dichotomy: if f is an Axiom-A polynomial skew product, and f is connected, then every Fatou component of f is homeomorphic to an open ball; otherwise, some Fatou component of f has infinitely generated first homology.

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