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arXiv 1001.0953math.DSmath.CV
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推广的Fatou-Shishikura不等式与多项式的游荡分支连续统

An Extended Fatou-Shishikura inequality and wandering branch continua for polynomials

Alexander Blokh, Doug Childers, Genadi Levin, Lex Oversteegen, Dierk Schleicher

摘要:

设$P$是一个多项式的次数$d$与朱莉娅集$J_P$。令$\widetilde N$为$P$的非排斥循环数。利用著名的Fatou-Shishikura不等式$\widetilde N\le d-1$ .本文的目的就是改进这个界。新计数包括\emph{wandering collections of non-precritical branch continua},即,连续统或点的集合$Q_i\subset J_P$ \emph{all},其图像是成对不相交的,不包含临界点,并且包含$\mathrm{eval}(Q_i)\ge 3$外部射线的极限集。此外,我们涉及个人的周期,这是非排斥或排斥没有定期射线登陆,个人的临界点,是经常性的弱意义。该不等式的弱版本为\[ \widetilde N+N_{irr}+χ+\sum_i (\mathrm{eval}(Q_i)-2) \le d-1 \],其中$N_{irr}$计数没有周期性射线落在周期中的点处的排斥周期,$\{Q_i\}$形成非临界前分支连续统的游荡集合$\mathcal{B}_\mathbb{C}$,如果$\mathcal{B}_\mathbb{C}$非空,则为$χ=1$,否则为$χ=0$。

英文摘要:

Let $P$ be a polynomial of degree $d$ with Julia set $J_P$. Let $\widetilde N$ be the number of non-repelling cycles of $P$. By the famous Fatou-Shishikura inequality $\widetilde N\le d-1$. The goal of the paper is to improve this bound. The new count includes \emph{wandering collections of non-precritical branch continua}, i.e., collections of continua or points $Q_i\subset J_P$ \emph{all} of whose images are pairwise disjoint, contain no critical points, and contain the limit sets of $\mathrm{eval}(Q_i)\ge 3$ external rays. Also, we relate individual cycles, which are either non-repelling or repelling with no periodic rays landing, to individual critical points that are recurrent in a weak sense. A weak version of the inequality reads \[ \widetilde N+N_{irr}+χ+\sum_i (\mathrm{eval}(Q_i)-2) \le d-1 \] where $N_{irr}$ counts repelling cycles with no periodic rays landing at points in the cycle, $\{Q_i\}$ form a wandering collection $\mathcal{B}_\mathbb{C}$ of non-precritical branch continua, $χ=1$ if $\mathcal{B}_\mathbb{C}$ is non-empty, and $χ=0$ otherwise.

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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