proposition: Lemma measurableT_comp (f : T2 -> T3) E (g : T1 -> T2) : measurable_fun setT f -> measurable_fun E g -> measurable_fun E (f \o g).
proof: Proof. exact: measurable_comp. Qed.
imports: mathcomp(all_ssreflect all_algebra finmap) mathcomp(mathcomp_extra boolp classical_sets functions) mathcomp(cardinality fsbigop ) reals ereal signed topology normedtype sequences esum numfun HB(structures)