fact: Definition pushforward d1 d2 (T1 : measurableType d1) (T2 : measurableType d2) (R : realFieldType) (m : set T1 -> \bar R) (f : T1 -> T2) of measurable_fun setT f := fun A => m (f @^-1` A).
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)