fact: Definition kadd : X -> {measure set Y -> \bar R} := fun x => [the measure _ _ of measure_add (k1 x) (k2 x)].
imports: HB(structures) mathcomp(all_ssreflect ssralg ssrnum ssrint interval finmap) mathcomp(mathcomp_extra boolp classical_sets functions) mathcomp(cardinality fsbigop) reals ereal signed topology normedtype sequences esum measure numfun lebesgue_measure lebesgue_integral