In the presence of closely located inclusions of the extreme material prop-erty,the physical fields,such as the electric field and the stress tensor,may be con-
We prove the existence of trajectories shadowing chains of heteroclinic or-bits to a symplectic normally hyperbolic critical manifold of a Hamiltonian system.Th
In this paper we introduce a method to construct periodic solutions for the n-body problem with only boundary and topological constraints.Our approach is based