Hans Koch
Attracting invariant tori and analytic conjugacies
(532K, pdf)

ABSTRACT.  We consider the problem of conjugating a flow on T^d x R 
to an "integrable" flow q'=w and p'=cp, if possible, with c nonzero. 
Our emphasis is on a constructive approach, 
using a KAM type iteration and analyticity. 
An application to the periodically forced Van der Pol oscillator is given.