to the asymptotic theory of linear homogeneous difference equations -- Formes canoniques rationnelles d'un systeme differentiel a point singulier irregulier -- The matrix of a connection having regular singularities on a vector bundle of rank 2 on IP1(c) -- Reduction of singularities of the differential equation A dy=B dx -- A poincare-bendixson theorem for compact kahler manifolds -- Birkhoff invariants and meromorphic differential equations -- Remarques sur les equations differentielles a points singuliers irreguliers -- Regular singularities along normal crossings -- Etude de certains systemes de pfaff avec singularites -- A propos du théorème de Borel-Ritt a plusieurs variables -- Sur la monodromie des systemes de Pfaff du type de Fuchs sur ?m(?) -- The problems of Riemann and Hilbert and the relations of fuchs in several complex variables.