proposition: Lemma gpaco9_gen_rclo clo r rg: gpaco9 (rclo9 clo) r rg <9= gpaco9 clo r rg.
proof: Proof. intros. destruct PR. econstructor. apply rclo9_compose. eapply rclo9_mon. apply IN. intros. destruct PR; [|right; apply H]. left. eapply paco9_mon_gen; intros; [apply H| |apply PR]. eapply gf_mon, rclo9_compose. apply PR. Qed.
imports: Program.Basics Paco(paco9 pacotac)