2103.07926
A FIXED POINT CURVE THEOREM FOR FINITE ORBITS LOCAL DIFFEOMORPHISMS
Lucivanio Lisboa, Javier Ribón
correctmedium confidence
- Category
- Not specified
- Journal tier
- Strong Field
- Processed
- Sep 28, 2025, 12:56 AM
- arXiv Links
- Abstract ↗PDF ↗
Audit review
The paper proves the Fixed Point Curve Theorem in C^2: for any local biholomorphism with finite orbits, some iterate has a germ of analytic curve contained in its fixed set; this is stated in the introduction and established via a semianalytic analysis of the periodic set and Theorem 4 on connected components of Per(F) (which become components of Per_m(F) and are complex-analytic of positive dimension in open balls) , with a key stabilization step Lemma 4.6 . The paper also records the standard spectral restriction |λ|=1 from a holomorphic stable manifold argument (cf. their Corollary 5, referenced in the discussion around Theorem 3) , and uses the fixed-curve result to deduce that at least one eigenvalue is a root of unity (proof of Theorem 3) . By contrast, the model’s “solution” merely cites the very Fixed Point Curve Theorem it is supposed to establish, rendering it circular; its tangent-to-identity consistency check aligns with the paper’s discussion of Abate’s parabolic-curve results but does not supply a proof of the general case . Hence: paper correct; model not a valid proof.
Referee report (LaTeX)
\textbf{Recommendation:} minor revisions
\textbf{Journal Tier:} strong field
\textbf{Justification:}
The manuscript proves a substantive structural theorem for finite-orbit local biholomorphisms in C\^2 and obtains sharp spectral consequences. The argument is careful, combining semianalytic geometry with dynamical considerations. Minor expository improvements would enhance accessibility, but the results appear correct and of interest to specialists in complex dynamics and local holomorphic geometry.