proposition: Lemma measurable_approxRN_seq n : measurable_fun setT (g_ n).
proof: Proof. by have := approxRN_seq_prop n; rewrite inE =>-[[_ /integrableP[]]]. Qed.
imports: mathcomp(all_ssreflect ssralg ssrnum ssrint interval) mathcomp(finmap fingroup perm rat) mathcomp(mathcomp_extra boolp classical_sets cardinality) mathcomp(functions fsbigop set_interval) HB(structures) reals ereal signed topology numfun normedtype sequences esum measure realfun lebesgue_measure lebesgue_integral