proposition: Lemma mfun_rect (K : T -> Type) : (forall f (Pf : f \in mfun), K (mfun_Sub Pf)) -> forall u : T, K u.
proof: Proof. move=> Ksub [f [[Pf]]]/=. by suff -> : Pf = (set_mem (@mem_set _ [set f | _] f Pf)) by apply: Ksub. Qed.
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