Department of Applied Mathematics, National University of Ireland, University College, Cork, Ireland ; Institute for Nonlinear Science, Department of Physics, National University of Ireland, University College, Cork, Ireland
Abstract:
Dynamical systems in are studied. Let be a bounded open set. We will be interested in those periodic orbits such that at least one of its points lies inside and at least one of its points lies outside ; the orbits with this property are called -broken. Information about the structure of the set of -broken orbits is suggested; results are formulated in terms of topological degree theory.