2106.07450
Local Connectivity of the Julia Sets with Bounded Type Siegel Disks
Shuyi Wang, Fei Yang, Gaofei Zhang, Yanhua Zhang
correctmedium confidence
- Category
- Not specified
- Journal tier
- Strong Field
- Processed
- Sep 28, 2025, 12:56 AM
- arXiv Links
- Abstract ↗PDF ↗
Audit review
The paper establishes Theorems A and B via a new Main Lemma based on quasi-Blaschke models and concludes local connectivity using the Shrinking Lemma and Whyburn’s criterion, explicitly noting that a global puzzle construction may not be available for the maps under consideration . By contrast, the candidate relies on building a single global forward-invariant puzzle/Markov partition for both rational (non-polynomial) and transcendental entire cases, invoking external or (pre)periodic rays and uniform a priori bounds around Siegel boundaries. This is unsupported: external (or “rational external”) rays used in their Step A3 generally do not exist for non-polynomial rational maps, and the paper replaces this very obstacle with a different method. For the transcendental case, the model again requires a global puzzle and does not justify the Whyburn-type compactness/local finiteness step that the paper proves carefully . Hence, while the paper’s results and logic hold, the model’s approach is not valid as stated.
Referee report (LaTeX)
\textbf{Recommendation:} minor revisions
\textbf{Journal Tier:} strong field
\textbf{Justification:}
The paper develops a robust quasi-Blaschke mechanism to secure contraction near bounded-type Siegel boundaries and, combined with the Shrinking Lemma and Whyburn’s criterion, proves local connectivity for rational maps (including multi-critical boundary cases) and for transcendental entire maps under natural tameness assumptions. The results appear correct and push the boundary of what is known, especially in the transcendental case. Some expository tweaks would further aid readers navigating the technical constructions.