proposition: Lemma cover_measurable X F : measurable_cover X F -> forall k, measurable (F k).
proof: Proof. by move=> + k; rewrite /measurable_cover => -[] /(_ k). 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)