Concernant la cohomologie des fibres algebriques stables sur ?n (?).- Some rank two bundles on Pn?, whose chern classes vanish.- Deformations of sheaves and bundles.- Deformations a un parametre de varietes simples.- On the local torelli theorem, a review of known results.- Moduli in versal deformations of complex spaces.- Geometrie enumerative pour les multisecantes.- Complex cobordism and intersections of projective varieties.- Analycite separee et prolongements analytiques.- Topological properties of holomorphic and meromorphic mappings.- On the stability of holomorphic foliations with all leaves compact.