Caractérisation des paramètres d'Arthur‎, ‎une remarque

In The endoscopic classification of representations, J. Arthur has proved the Langlands' classification for discrete series of p-adic classical groups. This uses endoscopy and twisted endoscopy. In this very short note, we remark that the normalization a` la Langlands-Shahidi of the intertwining operators, allows to avoid endoscopy. This is based on the intertwining relation which is a very important point of this book.