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2012.03409

Equilibrium states which are not Gibbs measure on hereditary subshifts ∗

Zijie Lin, Ercai Chen

correctmedium confidence
Category
Not specified
Journal tier
Specialist/Solid
Processed
Sep 28, 2025, 12:55 AM

Audit review

The paper’s main theorem (Theorem 1.1) is proved via a clear and correct cylinder-counting argument combined with a Gibbs lower bound and an explicit formula for the multiplicative convolution κ = ν ∗ Bq,1−q on hereditary closures; it culminates in a contradiction with non-atomicity by forcing a uniform positive lower bound on ν of a sequence of cylinders, invoking Lemma 4.2 (atomicity criterion). The candidate solution, while capturing a related intuition (an upper bound on κ([W]) and a Gibbs lower bound), replaces the paper’s quantitative comparison by an unproven ‘tilted’ optimization step P̃ ≥ D^κ_{φ̃ + tζ} and a flawed sign analysis. Key steps (a replacement lemma controlling sup S_n φ̃ under 0→1 flips, and the derivation of P̃ ≥ D_{φ̃} + tD) are asserted but not established, and the final inequality comparing the lower and upper bounds on P̃ is not rigorously justified.

Referee report (LaTeX)

\textbf{Recommendation:} minor revisions

\textbf{Journal Tier:} specialist/solid

\textbf{Justification:}

The manuscript gives a clean, verifiable criterion ensuring that certain equilibrium states on hereditary subshifts are not Gibbs measures, and applies it to B-free systems. The core argument—cylinder formula, variation bounds, and an atomicity contradiction—is sound and clearly presented. A few small clarifications (logarithm base, bridging the q=1/2 to general q step, and some notation) would improve readability, but the mathematical content looks correct and of interest to specialists.