Mathematics – Operator Algebras
Scientific paper
2011-08-13
Mathematics
Operator Algebras
16 pages
Scientific paper
In this paper, we establish a Marcinkiewicz type interpolation theorem for convex functions of maximal functions in the noncommutative setting. As applications, we prove the noncommutative analogue of the Doob inequality for convex functions of maximal functions on martingales, the analogue of the classical Dunford-Schwartz maximal ergodic inequality for convex functions of positive contractions, and that of Stein's maximal inequality for convex functions of symmetric positive contractions. As a consequence, we obtain the moment Burkholder-Davis-Gundy inequality for noncommutative martingales.
Bekjan Turdebek N.
Chen Zeqian
Osȩkowski Adam
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