On reducibility for a class of n-dimensional quasi-periodic systems with a small parameter

摘要

In this paper we consider the reducibility of a class of n-dimensional real analytic quasi-periodic systems with a small parameter: x˙=(A+ϵQ(t,ϵ))x,x∈Rn.We prove that if the basic frequencies of Q and the eigenvalues of A satisfy some non-resonance conditions, then for most of the sufficiently small parameters in the sense of Lebesgue measure, the system is reducible without any non-degeneracy assumption with respect to the parameter. Moreover, under some assumptions, we obtain a similar result for nonlinear quasi-periodic systems.