proposition: Lemma nexp_Sn : forall (x : R) n, x[*]x[^]n [=] x[^]S n.
proof: Proof. intros x n. Step_final (x[^]n[*]x). Qed.
imports: CoRN.tactics.CornTac CoRN.algebra.CSums CoRN.algebra.CAbMonoids Coq.Sorting.Permutation CoRN.util.SetoidPermutation Coq.Setoids.Setoid Coq.Classes.Morphisms Coq(Lia)