[HTML][HTML] A modified parameterization method for invariant Lagrangian tori for partially integrable Hamiltonian systems

JL Figueras, A Haro - Physica D: Nonlinear Phenomena, 2024 - Elsevier
In this paper we present an a-posteriori KAM theorem for the existence of an (n− d)-
parameter family of d-dimensional isotropic invariant tori with Diophantine frequency vector …

Sun–Jupiter–Saturn System May Exist: A Verified Computation of Quasiperiodic Solutions for the Planar Three-Body Problem

JL Figueras, A Haro - Journal of Nonlinear Science, 2025 - Springer
In this paper, we present evidence of the stability of a model of our Solar System when
taking into account the two biggest planets, a planar (Newtonian) Sun–Jupiter–Saturn …

Global properties of generic real–analytic nearly–integrable Hamiltonian systems

L Biasco, L Chierchia - Journal of Differential Equations, 2024 - Elsevier
We introduce a new class G sn of generic real analytic potentials on T n and study global
analytic properties of natural nearly–integrable Hamiltonians 1 2| y| 2+ ε f (x), with potential …

Rotation Vectors for Torus Maps by the Weighted Birkhoff Average

E Sander, JD Meiss - arXiv preprint arXiv:2310.11600, 2023 - arxiv.org
In this paper, we focus on distinguishing between the types of dynamical behavior that occur
for typical one-and two-dimensional torus maps, in particular without the assumption of …

Computer-Assisted Proofs of Existence of Invariant Tori in Quasi-periodic Systems via Fourier Methods

A Haro, ES Vidal - arXiv preprint arXiv:2403.18566, 2024 - arxiv.org
The goal of this paper is to provide a methodology to prove existence of (fiberwise
hyperbolic) real-analytic invariant tori in real-analytic quasi-periodic skew-product dynamical …

Proportions of Incommensurate, Resonant, and Chaotic Orbits for Torus Maps

E Sander, JD Meiss - arXiv preprint arXiv:2407.12039, 2024 - arxiv.org
This paper focuses on distinguishing classes of dynamical behavior for one-and two-
dimensional torus maps, in particular between orbits that are incommensurate, resonant …

A parametrization algorithm to compute lower dimensional elliptic tori in Hamiltonian systems

C Caracciolo, JL Figueras, A Haro - Nonlinearity, 2025 - iopscience.iop.org
We present an algorithm for the construction of lower dimensional elliptic tori in parametric
Hamiltonian systems by means of the parametrization method with the tangent and normal …

Computer Validation of Open Gaps for the Almost Mathieu Operator with Critical Coupling

JL Figueras, J Puig - arXiv preprint arXiv:2410.18536, 2024 - arxiv.org
We present some computer assisted methods to prove the existence of spectral gaps for the
Almost Mathieu operator at critical coupling and give rigorous numerical estimates on their …

Computer-assisted proofs of existence of fiberwise hyperbolic invariant tori in quasi-periodic systems via Fourier methods

A Haro, ES Vidal - Discrete and Continuous Dynamical Systems-Series …, 2024 - recercat.cat
The goal of this paper is to provide a methodology to prove the existence of (fiberwise
hyperbolic) real-analytic invariant tori in real-analytic quasi-periodic skew-product dynamical …

Computer assisted proofs for hyperbolic quasi-periodic invariant tori in dissipative twist maps

V Linroth - arXiv preprint arXiv:2305.04640, 2023 - arxiv.org
This paper outlines an approach for proving existence of hyperbolic quasi-periodic invariant
tori using computer assisted methods based on an a posteriori KAM-like theorem. We …