Title : The primitive idempotents of the p-permutation ring.

Authors : Serge Bouc and Jacques Thévenaz.

Abstract~: Let G be a finite group, let p be a prime number, and let K be a field of characteristic 0 and k be a field of characteristic p, both large enough. In this note we state explicit formulae for the primitive idempotents of K\otimes pp_k(G), where pp_k(G) is the ring of p-permutation kG-modules.