Fourier transforms of some invariant distribution on semisimple Lie groups and Lie algebras -- Global solvability of bi-invariant differential operators on solvable Lie groups -- “Base change” géométrique : Relèvement de la série principale de GL(n,?/?) -- Sur la méthode des orbites -- Polynomes de Vogan pour SL(n, ?) -- On a fundamental series of representations related to an affine symmetric space -- Higher order tensor products of wave equations -- W-module structure in the primitive spectrum of the enveloping algebra of a semisimple Lie algebra -- Functions on the shilov boundary of the generalized half plane -- K-types and singular spectrum -- A vanishing theorem for L2-cohomology in the nilpotent case -- The Eichler Commutation Relation and the continuous spectrum of the weil representation.