Table of Contents

Symmetries and covariant representations.- Jump processes and applications to the trigonometric interaction.- Generalized homomorphisms between C*-algebras and KK-theory.- Global equilibria and steady states of discrete networks, according to classical thermodynamics.- Completeness of three body quantum scattering.- Mathematical structure in quantum field theory.- Hydrodynamik gekoppelter diffusionen: Fluktuationen im gleichgewicht.- Superrenormalizable infra red theories.- Un modele d'univers confronte aux observations.- Almost mathieu equation for small and big coupling constants.- Periodic solutions of hamiltonian equations.