proposition: Lemma gpaco11_step clo r rg: gf (gpaco11 clo rg rg) <11= gpaco11 clo r rg.
proof: Proof. intros. apply gpaco11_step_gen. eapply gf_mon. apply PR. intros. eapply gpaco11_mon. apply PR0. left; apply PR1. left; apply PR1. Qed.
imports: Program.Basics Paco(paco11 pacotac)