Title: Existence of Critical Invariant Tori
Author: Hans Koch
Abstract:   We consider analytic Hamiltonian systems with two degrees of freedom, and prove that every Hamiltonian on the strong local stable manifold of the renormalization group fixed point obtained in [26]has a non-differerentiable golden invariant torus (conjugacy to a linear flow).
Paper: Sections 1-5, Section.6.tgz (formatted program source)