Vol. 116, No. 1, 1985

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Carathéodory convex integrand operators and probability theory

Nikolaos S. Papageorgiou

Vol. 116 (1985), No. 1, 155–184
Abstract

In two recent papers, the author studied extensions of several concepts of nonsmooth analysis to vector valued operators. The purpose of the present work is to further continue this effort and to study, from a probabilistic viewpoint, several properties of convex operators. In particular, we will examine how various basic concepts of vectorial nonsmooth analysis associated with an integrand f(ω,x) are related to those of the integral operator F(x) = Ω f(ω,x)(ω) where the vector valued integral is defined in the sense of Bochner. Also we introduce a conditional expectation for such integrands, study several of its properties, see how it is affected by various operations of nonsmooth analysis, and derive a vector valued martingale convergence theorem.

Mathematical Subject Classification 2000
Primary: 90C48
Secondary: 28B05, 60A10
Milestones
Received: 14 March 1983
Published: 1 January 1985
Authors
Nikolaos S. Papageorgiou
Department of Mathematics
National Technical University
Zografou Campus
15780 Athens
Greece