Proof Let X and Y be integrable random variables on the probability space (Ω,F,P)andA⊂Fbe a σ-field. Show that E[YE(X|A)] = E[XE(Y|A)], assuming that both integrals exist.

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Chapter4: Vector Spaces
Section4.4: Spanning Sets And Linear Independence
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Let X and Y be integrable random variables on the probability space (Ω,F,P)andA⊂Fbe a σ-field. Show that E[YE(X|A)] = E[XE(Y|A)], assuming that both integrals exist.

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