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2101.00568

Almost automorphy of minimal sets for C1-smooth strongly monotone skew-product semiflows on Banach spaces

Yi Wang, Jinxiang Yao

correctmedium confidence
Category
math.DS
Journal tier
Specialist/Solid
Processed
Sep 28, 2025, 12:55 AM

Audit review

The paper proves Theorem 3.1 by constructing a compact, strongly positive cocycle on the fibered pair space K×_Y K (via the hybrid operator T) and establishing exponential separation with an internal growth control (Proposition 2.5(v)), then deriving two crucial facts: (i) close unordered pairs converge forward (Proposition 3.3), and (ii) unordered pairs are negatively distal (Proposition 3.4). These yield P(K) = O(K), the distal quotient (Ỹ,R), and the factorization p = p̃∘p*, with p* almost 1–1 and p̃ an N–1 extension; if (Y,R) is almost periodic, then (K,R) is almost automorphic (Theorem 3.1) . The model’s outline reverses both key lemmas (it claims uniform forward separation for unordered pairs and negative distality for ordered pairs), contradicting Proposition 3.3 and Proposition 3.4 in the paper; although the model reaches the same end conclusions, its core logic is incorrect .

Referee report (LaTeX)

\textbf{Recommendation:} minor revisions

\textbf{Journal Tier:} specialist/solid

\textbf{Justification:}

The manuscript extends a well-known C1,α result to the C1 setting by introducing an internal growth control within exponential separation on a pair-bundle, bypassing Pesin-theoretic machinery. The proofs are careful and technically sound; the contribution is of interest to specialists in monotone dynamics and nonautonomous differential equations. Minor clarifications would further improve readability.