proposition: Lemma sintegral_ge0 (f : {nnsfun T >-> R}) : 0 <= sintegral mu f.
proof: Proof. by rewrite sintegralE fsume_ge0// => r _; exact: nnsfun_mulemu_ge0. Qed.
imports: HB(structures) mathcomp(all_ssreflect ssralg ssrnum ssrint interval finmap) mathcomp(mathcomp_extra boolp classical_sets functions) mathcomp(cardinality fsbigop ) signed reals ereal topology normedtype sequences real_interval esum measure lebesgue_measure numfun