Invariant manifolds of maps and vector fields with nilpotent parabolic tori

2023/10/09 by Clara Cufí-Cabré, Cufí-Cabré, Clara, Ernest Fontich +1
Mathematics · Physics and Astronomy · #Dynamical Systems (math.DS) #FOS: Mathematics #Geometric and Algebraic Topology #Mathematical Dynamics and Fractals #Quantum chaos and dynamical systems

paper · pdf · doi:10.48550/arxiv.2310.05630

openalex publication_date 2023/10/09 · openalex created_date 2023/10/12 · openalex updated_date 2026/08/01

Abstract

We consider analytic maps and vector fields defined in ℝ² × \mathbbT^d, having a d-dimensional invariant torus T. The map (resp. vector field) restricted to T defines a rotation of frequency ω, and its derivative restricted to transversal directions to T does not diagonalize. In this context, we give conditions on the coefficients of the nonlinear terms of the map (resp. vector field) under which T possesses stable and unstable invariant manifolds, and we show that such invariant manifolds are analyitic away from the invariant torus. We also provide effective algorithms to compute approximations of parameterizations of the invariant manifolds, and present some applications of the results.

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