2202.11517
REFINEMENTS OF FRANKS’ THEOREM AND APPLICATIONS IN REEB DYNAMICS
Hui Liu, Jian Wang, Jingzhi Yan
correctmedium confidence
- Category
- math.DS
- Journal tier
- Specialist/Solid
- Processed
- Sep 28, 2025, 12:56 AM
- arXiv Links
- Abstract ↗PDF ↗
Audit review
The paper proves Theorem 1 and its reversible refinement (Theorem 2) as stated, using rotation-number forcing (Franks/Le Calvez) and a maximal-isotopy/foliation argument to produce distinct rotation numbers when needed, then selecting denominators coprime to n0. The candidate solution reaches the same conclusions: in the two-rotation-number case it uses the same forcing; in the constant-rotation case it gives a shorter route via Franks’ 1992 theorem on infinitely many interior periodic points. Minor fix: in the reversible gcd-refinement, a q-prime-periodic orbit of g=f^k yields a symmetric periodic orbit of f whose prime period divides kq (not necessarily equals kq). This correction does not affect the conclusion that infinitely many symmetric prime periods remain coprime to n0. Overall, the paper is correct and complete, and the model’s solution is essentially correct after that small repair (Theorem 1 statement and interpretation match the paper’s union-of-Per sets, which avoids claiming infinitely many distinct periods) .
Referee report (LaTeX)
\textbf{Recommendation:} minor revisions \textbf{Journal Tier:} specialist/solid \textbf{Justification:} The paper presents precise refinements of Franks’ theorem, including a reversible version with symmetric orbits, under natural finite-area hypotheses. The strategy blends classical rotation forcing with maximal isotopy and transverse foliations, yielding results applicable to Reeb dynamics. Proofs are careful and complete; a few statements about induced periods could be clarified to avoid overinterpretation. Overall, this is a solid contribution for specialists in low-dimensional dynamics.