Herman's approach to quasi-periodic perturbations in the reversible KAM context 2

Mikhail B. Sevryuk

Published 2016-12-22Version 1

We revisit non-autonomous systems depending quasi-periodically in time within the reversible context 2 of KAM theory and obtain Whitney smooth families of invariant tori in such systems via Herman's method. The reversible KAM context 2 refers to the situation where the dimension of the fixed point manifold of the reversing involution is less than half the codimension of the invariant torus in question.