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2 matches found
IV: 01, 1-27, LNM 124 (1970)
Une inégalité pour martingales à indices multiples et ses applications (Several parameter processes)
This paper was the starting point of the theory of two-parameter martingales. It proves the corresponding Doob inequality and convergence theorem, with an application to biharmonic functions
Comment: The next landmark in the theory is Cairoli-Walsh, Acta. Math., 134, 1975. For the modern results, see Imkeller, Two Parameter Processes and their Quadratic Variation, Lect. Notes in M. 1308, 1989
Keywords: Two-parameter martingales, Maximal inequality, Almost sure convergence
Nature: Original
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XV: 17, 251-258, LNM 850 (1981)
PITMAN, James W.
A note on $L_2$ maximal inequalities (Martingale theory)
This paper contains a $L^2$ inequality between two processes $(X_n,M_n)$ under assumptions which (if $X$ is a martingale) apply to $M_n=\sup_{m\le n} |X_m|$, and to other interesting cases as well. In particular, Doob's inequality is valid for the larger process $\sup_{m\le n} X_m^+ +\sup_{m\le n} X_m^-$
Keywords: Maximal inequality, Doob's inequality
Nature: Original
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