proposition: Lemma Σ_mult n f k: Σ n f * k == Σ n (Qmult k ∘ f).
proof: Proof. unfold Σ, Basics.compose. induction n. reflexivity. intros. simpl. rewrite <- IHn. ring. Qed.
imports: CoRN.stdlib_omissions.List Coq.QArith.QArith Coq.QArith.Qabs CoRN.model.totalorder.QposMinMax CoRN.model.metric2.Qmetric Coq.Program.Program CoRN.stdlib_omissions.N CoRN.stdlib_omissions.Z CoRN.stdlib_omissions.Q