proposition: Lemma gpaco5_gen_rclo clo r rg: gpaco5 (rclo5 clo) r rg <5= gpaco5 clo r rg.
proof: Proof. intros. destruct PR. econstructor. apply rclo5_compose. eapply rclo5_mon. apply IN. intros. destruct PR; [|right; apply H]. left. eapply paco5_mon_gen; intros; [apply H| |apply PR]. eapply gf_mon, rclo5_compose. apply PR. Qed.
imports: Program.Basics Paco(paco5 pacotac)