proposition: Theorem well_founded_rpo : well_founded rpo.
proof: Proof. apply wf_rpo. intro a; destruct a;auto with rpo. Qed.
imports: Coq(Arith Lia Compare_dec Relations Wellfounded Wf_nat List Bool Eqdep_dec Ensembles ArithRing Logic) hydras(More_Arith Restriction DecPreOrder rpo.term rpo.rpo Epsilon0.T1)