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2008.06689

ALMOST POLYNOMIAL-LIKE MAPS IN POLYNOMIAL DYNAMICS

Alexander Blokh, Lex Oversteegen, Vladlen Timorin

correcthigh confidence
Category
Not specified
Journal tier
Strong Field
Processed
Sep 28, 2025, 12:55 AM

Audit review

The paper proves that under renormalizable wedges and eventual mapping of critical root points to repelling cycles, P|AP(W) is only guaranteed to be topologically conjugate to a lower-degree polynomial, via an almost polynomial-like (APL) surgery and APL straightening. It explicitly provides cases where AP(W) is not the filled set of any polynomial-like restriction of P (e.g., the cubic example in Figure 1), contradicting the model’s claim that one can always construct a holomorphic polynomial-like restriction with K(f)=AP(W) under these weaker assumptions. The model’s argument matches only the stronger classical setting of Theorem 1.2 (no critical or outward parabolic root points), not the paper’s main theorem.

Referee report (LaTeX)

\textbf{Recommendation:} minor revisions

\textbf{Journal Tier:} strong field

\textbf{Justification:}

The manuscript develops a robust generalization of classical polynomial-like renormalization by introducing almost polynomial-like (APL) maps and proving an APL straightening theorem. This enables a clean resolution of the conjugacy problem for avoiding sets under weak hypotheses on critical root points, extending well beyond the immediate-renormalization regime. The exposition is careful and the strategy (carrot/pseudo-carrot surgery followed by straightening) is compelling. A few presentation tweaks would further improve readability, but the mathematical content appears correct and significant.