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2111.01579

JULIA SETS AND GEOMETRICALLY FINITE MAPS OVER FINITE EXTENSIONS OF THE p-ADIC FIELD

Shilei Fan, Lingmin Liao, Hongming Nie, Yuefei Wang

correctmedium confidence
Category
math.DS
Journal tier
Strong Field
Processed
Sep 28, 2025, 12:56 AM

Audit review

The paper proves JCp(φ) ∩ P1_K = JK(φ) under assumptions (1) no wild recurrent critical points in JCp(φ) ∩ P1_K and (2) each minimal class has ≤2 representatives there, via a careful reduction to Julia-critical points and a construction of repelling (pre)periodic points in specific K-disks (Propositions 3.7, 3.8, 3.10; Corollaries 3.9, 3.11), together with boundary and diameter-control lemmas (Lemmas 3.1, 3.2) and a reduction (Proposition 3.4) . The candidate solution reaches the same conclusion but assumes a stronger claim (“every K-disk in JCp(φ) ∩ P1_K contains a K-repelling periodic point”), and cites it as a theorem. That statement is not presented verbatim in the paper; instead, the paper proves existence of (pre)repelling points in carefully chosen disks near critical orbits to force non-equicontinuity. Thus, while the conclusion matches and the high-level mechanism (repelling points force JK-membership) aligns with the paper’s strategy , the candidate’s argument overstates what is proven locally and misnumbers the cited result. Overall, both are correct on the main equality, but the paper’s proof is more precise and complete.

Referee report (LaTeX)

\textbf{Recommendation:} minor revisions

\textbf{Journal Tier:} strong field

\textbf{Justification:}

The result settles, under transparent orbit-structure conditions, when the K-Julia set coincides with the Cp-Julia locus restricted to P1\_K, and it underlies a symbolic dynamics model for geometrically finite maps. The argument is technically careful, modular (boundary, disk-orbit dichotomy, critical-class reduction, repelling point construction), and uses modern non-Archimedean tools. Minor clarifications would further improve readability.