proposition: Lemma sfinite_measure_seqP U : measurable U -> mu U = mseries sfinite_measure_seq O U.
proof: Proof. by move=> mU; rewrite /mseries /= /s; case: cid2 => // x xfin ->. 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)