Vol. 34, No. 1, 1970

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ISSN: 0030-8730
A note on the characterization of conditional expectation operators

Daniel Eliot Wulbert

Vol. 34 (1970), No. 1, 285–288
Abstract

Let (X, ) be an arbitrary measure space. A complete characterization is presented for the norm one positive projections P of L1(X, ) into itself such that f∥∞Pf for each essentially bounded, summable function f.

Mathematical Subject Classification
Primary: 46.35
Secondary: 60.00
Milestones
Received: 18 February 1969
Published: 1 July 1970
Authors
Daniel Eliot Wulbert