The Herman invariant tori conjecture
Dynamical Systems
2022-09-13 v2
Abstract
We study a new type of normal form at a critical point of an analytic Hamiltonian. Under a Bruno condition on the frequency, we prove a convergence statement to the normal form. Using this result, we prove the Herman invariant tori conjecture namely the existence of a positive measure set of invariant tori near the critical point. This paper is an update of the first 2012 proof of the author. The functional analytic arguments have been simplified using Banach functors, minor points have been clarified. A series of videos is available on the webpage https://www.agtz.mathematik.uni-mainz.de/category/alg-geom/
Cite
@article{arxiv.1909.06053,
title = {The Herman invariant tori conjecture},
author = {Mauricio Garay and Duco van Straten},
journal= {arXiv preprint arXiv:1909.06053},
year = {2022}
}