Recent advances in enveloping algebras of semi-simple lie-algebras [A report on work of N. Conze, J. Dixmier, M. Duflo, J. C. Jantzen, A. Joseph, W. Borho] -- The light in the neighborhood of a caustic -- Newton polygons and estimates of oscillatory integrals -- Kleinian groups [A survey] -- Faisceaux amples et trรจs amples [dโ{128}{153}aprรจs T. Matsusaka] -- Le problรจme des cardinaux singuliers [dโ{128}{153}aprรจs R. B. Jensen et J. Silver] -- Hyperfonctions et รฉquations aux dรฉrivรฉes partielles dโ{128}{153}aprรจs M. Sato, T. Kawai et M. Kashiwara] -- Spectre de lโ{128}{153}รฉquation de schrรถdinger, application a la stabilitรฉ de la matiรจre [dโ{128}{153}aprรจs J. Lebowitz, E. Lieb, B. Simon et W. Thirring] -- The combinatorial formula of gabrielov, gelfand and losik for the first pontrjagin class -- Opรฉrateurs diffรฉrentiels bi-invariants [dโ{128}{153}aprรจs M. Duflo] -- Constructions de feuilletages [dโ{128}{153}aprรจs W. Thurston] -- Some recent results on surfaces of general type -- Opรฉrateurs carrรฉ du champ [dโ{128}{153}aprรจs J. P. Roth] -- On the finite simple groups [according to Aschbacher and Gorenstein] -- Sur la conjecture de birch-swinnerton dyer [dโ{128}{153}aprรจs J. Coates et A. Wiles] -- Travaux de H. Skoda sur la classe de Nevanlinna -- Groupes de whitehead de groupes algรฉbriques simples sur un corps [dโ{128}{153}aprรจs V. P. Platonov et al.] -- On the enriques classification of algebraic surfaces