Français
We prove by elementary means that the formal series $\Pi $ is transcendental, using the theorem of Christol, Kamae, Mendès France and Rauzy.
L'abonnement correspond aux 8 volumes annuels : 7 volumes d'Astérisque et le volume des exposés Bourbaki de l'année universitaire écoulée.
This subscription corresponds to 8 volumes: 7 volumes of Astérisque plus one volume with the texts of the Bourbaki talks given in the past year.