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Upper bounds for theL p -norms of martingales
Authors:Paweŀ Hitczenko
Institution:(1) Department of Mathematics, Texas A&M University, 77843-3368 College Station, TX, USA;(2) Present address: Department of Mathematics, North Carolina State University, P.O. Box 8205, 27695-8205 Raleigh, NC, USA
Abstract:Summary Let (f n ) be a martingale. We establish a relationship between exponential bounds for the probabilities of the typeP(|f n |>lambda·VerbarT(f n )Verbarinfin) and the size of the constantC p appearing in the inequality Verbarf *Verbar p lEC p VerbarT *(f)Verbar p , for some quasi-linear operators acting on martingales.This research was supported in part by NSF Grant, no. DMS-8902418On leave from Academy of Physical Education, Warsaw, Poland
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