Claudia Wulff.

* Relative periodic points of symplectic maps:
persistence and bifurcations *

In this paper we study symplectic
maps with a continuous symmetry group arising by periodic forcing of
symmetric Hamiltonian
systems. By Noether's Theorem, for each continuous symmetry the symplectic
map has a conserved momentum. We study the persistence of
relative periodic points
of the symplectic map when momentum is varied and also treat subharmonic persistence
and relative subharmonic bifurcations of relative periodic points.