fact: Definition locally_integrable D f := [/\ measurable_fun D f, open D & forall K, K `<=` D -> compact K -> \int[mu]_(x in K) `|f x|%:E < +oo].
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