Abstract
This paper mainly concerns the KAM persistence of the mapping
$\mathscr {F}:\mathbb {T}^{n}\times E\rightarrow \mathbb {T}^{n}\times \mathbb {R}^{n}$
with intersection property, where
$E\subset \mathbb {R}^{n}$
is a connected closed bounded domain with interior points. By assuming that the frequency mapping satisfies certain topological degree condition and weak convexity condition, we prove some Moser-type results about the invariant torus of mapping
$\mathscr {F}$
with frequency-preserving under small perturbations. To our knowledge, this is the first approach to Moser's theorem with frequency-preserving. Moreover, given perturbed mappings over
$\mathbb {T}^n$
, it is shown that such persistence still holds when the frequency mapping and perturbations are only continuous about parameter beyond Lipschitz or even Hölder type. We also touch the parameter without dimension limitation problem under such settings.
Publisher
Cambridge University Press (CUP)
Reference40 articles.
1. Persistence of Invariant Tori on Submanifolds in Hamiltonian Systems
2. On conservation of conditionally periodic motions for a small change in Hamilton's function;Kolmogorov;Dokl. Akad. Nauk SSSR,1954
3. A new proof of Moser's theorem;Liu;J. Appl. Anal. Comput,2022
4. Multiscale KAM theorem for Hamiltonian systems
5. The Kolmogorov-Arnold-Moser theorem;Salamon;Math. Phys. Electron. J,2004