paper

A noncommutative Davis' decomposition for martingales

arXiv:0906.4434 · doi:10.1112/jlms/jdp045

Abstract

We prove an analogue of the classical Davis' decomposition for martingales in noncommutative L_p-spaces, involving the square functions. We also determine the dual space of the noncommutative conditioned Hardy space \h_1. We further extend this latter result to the case 1<p<2.

To be published in Journal of London Math. Soc

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