proposition: Lemma mfunX f n : f ^+ n = (fun x => f x ^+ n) :> (_ -> _).
proof: Proof. by apply/funext=> x; elim: n => [|n IHn]//; rewrite !exprS mfunM/= IHn. 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