Pointwise ergodic theorems for arithmetic sets . Le théorème de comparaison entre cohomologies de de Rham d'une variété algébrique complexe et le théorème d'existence de Riemann . Volumes of s-arithmetic quotients of semi-simple groups . Finiteness theorems for discrete subgroups of bounded covolume in semi-simple groups . Harmonic mappings of Kähler manifolds to locally symmetric spaces . Absolutely continuous invariant measures for maps with flat tops . A foliation of R[3] and other punctured 3-manifolds by circles . Transformation de Fourier et majoration de sommes exponentielles - Bourgain, Jean; Mebkhout, Zoghman; Prasad, Gopal; Borel, Armand; Carlson, James A.; Toledo, Domingo; Benedicks, Michael; Misiurewicz, Michał; Vogt, Elmar; Katz, Nicholas M.; Laumon, Gérard; Institut des hautes études scientifiques (France) (Publications mathématiques, 1989)