proposition: Lemma gpaco2_gen_rclo clo r rg: gpaco2 (rclo2 clo) r rg <2= gpaco2 clo r rg.
proof: Proof. intros. destruct PR. econstructor. apply rclo2_compose. eapply rclo2_mon. apply IN. intros. destruct PR; [|right; apply H]. left. eapply paco2_mon_gen; intros; [apply H| |apply PR]. eapply gf_mon, rclo2_compose. apply PR. Qed.
imports: Program.Basics Paco(paco2 pacotac)