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2503.08991

CONTINUUM-WISE HYPERBOLICITY AND PERIODIC POINTS

Bernardo Carvalho, Piotr Oprocha, Elias Rego

correctmedium confidence
Category
Not specified
Journal tier
Strong Field
Processed
Sep 28, 2025, 12:56 AM

Audit review

The paper proves (i) a periodic closing/shadowing theorem for cw-hyperbolic homeomorphisms with jointly continuous holonomies (Theorem 2.7) and (ii) periodic specification under mixing (Theorem 2.12), using a self-similar hyperbolic cw-metric and jointly pseudo-isometric holonomies to control holonomy rectangles and a careful r-block construction to close periodic pseudo-orbits . The candidate solution mirrors the rectangle scheme and the self-similar/pseudo-isometric reduction, but commits a critical error: it uses cw-expansiveness to claim uniqueness of shadowing (and hence f^n(p)=p) when 2α<c. That uniqueness is false in the cw-expansive setting (even periodic pseudo-orbits can be shadowed by non-periodic points), a nuance explicitly noted in the paper’s discussion of shadowing multiplicity in the cw-framework and addressed in the proof via the r-iterate closing argument rather than expansivity-style uniqueness. The paper’s arguments are internally coherent with the needed constants and lemmas (e.g., the jointly pseudo-isometric holonomies after self-similarization) , while the model’s proof hinges on an invalid uniqueness step.

Referee report (LaTeX)

\textbf{Recommendation:} minor revisions

\textbf{Journal Tier:} strong field

\textbf{Justification:}

The manuscript delivers rigorous periodic closing and periodic specification results in the cw-hyperbolic setting under jointly continuous holonomies, with careful control via self-similar cw-metrics and pseudo-isometric holonomies. The r-iterate closing construction is well motivated and executed. Minor expository improvements (clarifying the failure of uniqueness of shadowing in cw-expansive systems and providing a navigational roadmap of constants and rectangles) would enhance accessibility.