Séminaire de Probabilités XL

Who could have predicted that the S´ eminaire de Probabilit´ es would reach the age of 40? This long life is ?rst due to the vitality of the French probabil- tic school, for which the S´ eminaire remains one of the most speci?c media of exchange. Another factor is the amount of enthusiasm, energy and time invested year after year by the R´ edacteurs: Michel Ledoux dedicated himself tothistaskuptoVolumeXXXVIII,andMarcYormadehisnameinseparable from the S´ eminaire by devoting himself to it during