proposition: Lemma indic_measurable_fun_fubini_tonelli_G : measurable_fun setT G.
proof: Proof. by rewrite indic_fubini_tonelli_GE//; exact: measurable_fun_ysection. Qed.
imports: HB(structures) mathcomp(all_ssreflect ssralg ssrnum ssrint interval finmap) mathcomp(mathcomp_extra boolp classical_sets functions) mathcomp(cardinality fsbigop ) signed reals ereal topology normedtype sequences real_interval esum measure lebesgue_measure numfun