Besides a series of six articles on Lévy processes, Volume 38 of the Séminaire de Probabilités contains contributions whose topics range from analysis of semi-groups to free probability, via martingale theory, Wiener space and Brownian motion, Gaussian processes and matrices, diffusions and their applications to PDEs.

Processus de Lévy: R.A. Doney: Tanaka's construction for random walks and Lévy processes.- R.A. Doney: Some excursion calculations for spectrally one-sided Lévy processes.- A.E. Kyprianou, Z. Palmowski: A martingale review of some fluctuation theory for spectrally megative Lévy processes.- M.R. Pistorius: A potential-theoretical review of some exit problems of spectrally negative Lévy processes.- L. Nguyen-Ngoc, M. Yor: Some martingales associated to reflected Lévy processes.- K.B. Erickson, R.A. Maller: Generalised Ornstein-Uhlenbeck processes and the convergence of Lévy integrals.- Autres Exposés: P. Fougères: Spectral gap for log-concave probability measures on the real line.- L. Godefroy: Propriété de Choquet-Deny et fonctions harmoniques sur les hypergroupes commutatifs.- M. Buiculescu: Exponential decay parameters associated with excessive measures.- V. Grecca: Positive bilinear mappings associated with stochastic processes.- A. Jakubowski: An almost sure approximation for the predictable process in the Doob-Meyer decomposition theorem.- A. Cherny, A. Shiryaev: On stochastic integrals up to infinity and predictable criteria for integrability.- Y. Kabanov, C. Stricker: Remarks on the true no-arbitrage property.- H. Bühler: Information-equivalence: On filtrations created by independent increments.- M. Zakai: Rotations and tangent processes on Wiener space.- I. Shigekawa: Lp multiplier theorem for the Hodge-Kodaira operator.- G. Peccati, C.A. Tudor: Gaussian limits for vector-valued multiple stochastic integrals.- J. Rosen: Derivatives of self-intersection local times.- N. Eisenbaum, C. A. Tudor: On squared fractional Brownian motions.- A. Ayache et al: Regularity and identification of generalised miltifractional Gaussian processes.- F. Benaych-Georges:Failure of the Raikov theorem for free random variables.- G. Aubrun: Aharp small deviation inequality for the largest eigenvalue of a randommatrix.- F. Baudoin: The tangent space to a hypoelliptic diffusion and applications.- A. Benchérif-Madani, É. Pardoux: Homogenization of a diffusion with locally periodic coefficients.