fact: Definition fin_num_fun d (T : semiRingOfSetsType d) (R : numDomainType) (mu : set T -> \bar R) := forall U, measurable U -> mu U \is a fin_num.
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)