A. Reinfelds, THE REDUCTION PRINCIPLE FOR DISCRETE DYNAMICAL AND SEMIDYNAMICAL SYSTEMS IN METRIC-SPACES, Zeitschrift fur angewandte Mathematik und Physik, 45(6), 1994, pp. 933-955
The main result of this paper is on decoupling by means of a topologic
al transformation of a homeomorphism which admits invariant sets. A th
eorem of conjugacy of a given possible noninvertible mapping, which ad
mits an invariant set, to a simpler mapping than the given one in term
s of decoupling is also proved. The results are valid in an arbitrary
complete metric space.