proposition: Lemma nexp_one : forall x : R, x[^]1 [=] x.
proof: Proof. intro x. Step_final ([1][*]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)