IX: 03, 154-205, LNM 465 (1975) NANOPOULOS, Photius Mesures d'information et représentation de semi-groupes associés (Miscellanea) Several attempts have been made to define the information content of an event on a measurable space independently from its probability. This paper develops a point of view of Kampé de Fériet-Forte, C.R.A.S. Paris,265A, 1969 Keywords: Information theory Nature: Original Retrieve article from Numdam