Global Analysis : Proceedings of the Biennial Seminar of the Canadian Mathematical Congress Calgary Alberta June 12 – 27 1978 On a trace functional for formal pseudo differential operators and the Hamiltonian structure of korteweg devries types equations A remark on a generalized uncertainty principle Dissipative dynamical systems of macroscopic physics On the prevalence of aperiodicity in simple systems On the geometry of the Liapunov Schmidt procedure Integrable systems and algebraic curves On the eigenvalues of a class of hypoelliptic operators II On the smoothness of the time t map of the KdV equation and the bifurcation of the eigenvalues of Hills operator Self dual Yang Mills fields About isospectral deformations of discrete laplacians Bifurcations of periodic orbits in autonomous systems.