Measurable majorants in L1
Glasgow mathematical journal, Tome 39 (1997) no. 2, pp. 183-192

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Given a probability space (X, F, μ) and a σ-algebra A ⊂ F, arguably the most powerful tool in gaining information about an F-measurable function f from restricted knowledge of -measurability is that of the conditional expectation E(f | ); written throughout the remainder of this note. Two properties of conditional expectation that may be exploited to gain information, but which also limit conditional expectation's use are the following.
Lambert, Alan. Measurable majorants in L1. Glasgow mathematical journal, Tome 39 (1997) no. 2, pp. 183-192. doi: 10.1017/S0017089500032067
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