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¿ g¿¿ique : Rel¿ment de la s¿e principale de GL(n, ?/?).- Sur la m¿ode 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.