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2507.03338

LOCAL ENTROPY THEORY, COMBINATORICS, AND LOCAL THEORY OF BANACH SPACES

Hanfeng Li, Kairan Liu

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

Audit review

The paper proves, under amenability of Γ, the three identities relating IE_k(M(X)) and IE_k(X) (Theorem 1.1) and supplies a complete argument: convexity of IE_k(M(X)) (Lemma 3.2) and that (2)–(3) follow from (1) via Milman’s theorem and a barycenter lemma (Lemmas 3.3–3.5), with k=1 handled by a direct barycenter-support argument (Lemma 3.6) and k≥2 by new combinatorial techniques (Section 3.4). These steps, statements, and dependencies are explicit in the text . By contrast, the model crucially relies on two unsupported claims: (i) that IE_k(Y) = IE_k(Z) ∩ Y^k for every closed Γ-subsystem Y⊆Z (the paper only asserts inclusion; see Theorem 2.1(5) ), and (ii) a supposed “general barycentric theorem” (attributed to Kerr–Li) stating IE_k(K) equals the closed convex hull of IE_k(ext K) for any compact convex Γ-space K. The paper does not cite or use such a theorem and instead develops a dedicated proof for K = M(X). The model also omits the amenability hypothesis required for IE-tuples throughout. Hence the model’s proof is not valid, while the paper’s argument is correct and complete under its stated assumptions.

Referee report (LaTeX)

\textbf{Recommendation:} minor revisions

\textbf{Journal Tier:} strong field

\textbf{Justification:}

The paper delivers a precise and useful description of IE-tuples for the induced action on M(X) relative to the original system X. The proof strategy is well structured: convexity and compactness first, then a clean reduction of (2)–(3) to (1), and finally a substantive new combinatorial argument for (1) in the general k≥2 case. The exposition is clear overall, with only minor places where re-emphasizing hypotheses or adding navigational cues would help.