proposition: Lemma expectation_fin_num (X : {RV P >-> R}) : P.-integrable setT (EFin \o X) -> 'E_P[X] \is a fin_num.
proof: Proof. by move=> ?; rewrite unlock integral_fune_fin_num. Qed.
imports: mathcomp(all_ssreflect) mathcomp(ssralg poly ssrnum ssrint interval finmap) mathcomp(mathcomp_extra boolp classical_sets functions) mathcomp(cardinality) HB(structures) exp numfun lebesgue_measure lebesgue_integral reals ereal signed topology normedtype sequences esum measure exp numfun lebesgue_measure lebesgue_integral