fact: Definition crestr d (T : semiRingOfSetsType d) (R : numDomainType) (D : set T) (f : set T -> \bar R) of measurable D := fun X => f (X `&` D).
imports: mathcomp(all_ssreflect ssralg ssrnum ssrint interval) mathcomp(finmap fingroup perm rat) mathcomp(mathcomp_extra boolp classical_sets cardinality) mathcomp(functions fsbigop set_interval) HB(structures) reals ereal signed topology numfun normedtype sequences esum measure realfun lebesgue_measure lebesgue_integral