Table of contents : Noyau de la chaleur hypoelliptique et geometrie sous-riemannienne....Pages 1-16 On two classes of smooth measures for symmetric markov processes....Pages 17-27 The hydrodynamical limit for scalar ginzburg-landau model on R....Pages 28-36 Short time asymptotics for fundamental solutions of diffusion equations....Pages 37-49 Malliavin calculus on a segal space....Pages 50-72 Weak convergence of functionals of point processes on R d ....Pages 73-84 Image des points critiques d'une application reguliere....Pages 85-92 Degree theorem in certain wiener riemannian manifolds....Pages 93-108 Applications quantitatives et geometriques du calcul de malliavin....Pages 109-133 On the fock space representation of occupations times for non reversible markov processes....Pages 134-138 On weak solutions of stochastic partial differential equations....Pages 139-150 Une remarque sur les chaos de wiener....Pages 151-155 Limit theorem for one-dimensional diffusion process in brownian environment....Pages 156-172 Diffusion processes and heat kernels on certain nilpotent groups....Pages 173-197