2206.10511
Shift limits of a non-autonomous system
Dawoud Ahmadi Dastjerdi, Mahdi Aghaee
correctmedium confidence
- Category
- Not specified
- Journal tier
- Specialist/Solid
- Processed
- Sep 28, 2025, 12:56 AM
- arXiv Links
- Abstract ↗PDF ↗
Audit review
The paper establishes, with correct proofs, that in a surjective IFS over the shift-limit set Σ of a transitive t, specification (SP), strong specification (SSP), shadowing, and hence LWS transfer from t to every σ ∈ Σ; and in the sofic case, a point that is periodic along some σ projects to periodicity along a periodic σ′ ∈ Σ. The candidate solution correctly reconstructs SP, shadowing, LWS-transfer, and the sofic periodic projection using arguments substantially aligned with the paper. However, it explicitly omits a complete proof for SSP, which the paper covers (by the same scheme as SP). Since the problem encompasses Γ = {SP, SSP, LWS, shadowing}, the model’s solution is incomplete with respect to SSP, so we judge it incorrect for the full task.
Referee report (LaTeX)
\textbf{Recommendation:} minor revisions \textbf{Journal Tier:} specialist/solid \textbf{Justification:} The paper provides concise, correct transfer results for specification (including strong specification) and shadowing from a transitive code to all shift limits in surjective IFS settings, and a clean periodic projection result for sofic shifts. The arguments are standard but well-coordinated. Minor improvements in exposition (explicitly tracking assumptions and fleshing out the SSP case) would enhance clarity, but no major technical gaps were identified.