XV: 48, 673-688, LNM 850 (1981) MAZZIOTTO, Gérald; SZPIRGLAS, Jacques Un exemple de processus à deux indices sans l'hypothèse F4 (Several parameter processes) A natural two-parameter filtration is associated with a random point in the positive quadrant $R^2_+$. Though it does not satisfy in general the Cairoli-Walsh commutation property called F4, it is possible to develop for this filtration a reasonable theory of optional and previsible processes, projection theorems, etc Keywords: Two-parameter processes Nature: Original Retrieve article from Numdam