proposition: Lemma SN_Rof : forall b, SN R b -> forall a, b = f a -> SN Rof a.
proof: Proof. induction 1. intros. apply SN_intro. intros. apply (H0 (f y)). rewrite H1. hyp. refl. Qed.
imports: Coq(Morphisms List Basics Lia Wellfounded) CoLoR(LogicUtil RelUtil)