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2103.11964

HISTORIC WANDERING DOMAINS NEAR CYCLES

Pablo G. Barrientos

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

Audit review

The paper’s Theorem A states exactly the main claim the candidate advances: in a Cr-Newhouse domain N (r ≥ 1) of homoclinic tangencies associated with saddles satisfying condition (1) (complex pair λe±iφ, |λ^2 γ| < 1 < |λ γ|), there is a dense subset of diffeomorphisms with non-trivial historic contractive wandering domains, and such Newhouse domains arise near equidimensional and certain 3D heterodimensional cycles; see the statement of Theorem A and its surrounding discussion , together with the definition of condition (1) . The proof sketched in §2.1 matches the candidate’s Steps 1, 3, and 4: a GST-type rescaling provides a two-dimensional normally hyperbolic attracting invariant manifold Mn on which the first return is Hénon-like and has a dissipative homoclinic tangency (Lemma 2.1) ; then applying Kiriki–Soma on the 2D restriction and thickening along strong-stable plaques yields ambient historic contractive wandering domains densely in N . The “Moreover” proximity statements to cycles are also aligned with the paper’s arguments (equidimensional cycles with (H1)–(H2) and blender condition (H3) in C1; and the 3D heterodimensional cycle case via approximation to equidimensional cycles and Tatjer tangencies) . However, the candidate’s Step 2 incorrectly asserts that a Tatjer/Denjoy route in C1 already produces historic wandering domains on the 2D restriction. The paper explicitly emphasizes that known high-dimensional Denjoy-type wandering domains (including KNS17) are not historic; historicity is recovered by reducing to a 2D dissipative homoclinic tangency where the Kiriki–Soma surface theorem (C2) applies, using smooth maps inside the Newhouse domain or via the Tatjer-to-2D reduction (Theorems B and C) , , . Therefore, while the core outline matches the paper, the model conflates “wandering” with “historic” in the C1/Tatjer/Denjoy step.

Referee report (LaTeX)

\textbf{Recommendation:} minor revisions

\textbf{Journal Tier:} strong field

\textbf{Justification:}

The paper gives a coherent pathway from homoclinic tangency with complex multipliers to historic wandering domains in higher dimensions by combining renormalization on a normally hyperbolic surface with the surface case of Kiriki–Soma, and it situates the result near natural cycle configurations using modern tools (blenders, stabilization). The arguments track known techniques and appear correct. Some standard steps are left implicit (thickening the 2D wandering set to an ambient open set; handling the C1 case via smooth-density within the Newhouse domain), and spelling these out would improve readability. Overall, the work is a solid, meaningful contribution to smooth dynamics.