XII: 14, 132-133, LNM 649 (1978) CHOU, Ching Sung Extension au cas continu d'un théorème de Dubins (Martingale theory) After a suitable translation, Dubins' theorem can be stated as follows: if $X$ is a positive submartingale with $X_t\in L^2$ for all $t$, then $X^2-[X,X]$ is a submartingale Keywords: Submartingales Nature: Original Retrieve article from Numdam