proposition: Lemma mI : setI_closed measurable.
proof: Proof. by move=> A B mA mB; rewrite -setDD; do ?apply: measurableD. 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)