proposition: Lemma gpaco6_step clo r rg: gf (gpaco6 clo rg rg) <6= gpaco6 clo r rg.
proof: Proof. intros. apply gpaco6_step_gen. eapply gf_mon. apply PR. intros. eapply gpaco6_mon. apply PR0. left; apply PR1. left; apply PR1. Qed.
imports: Program.Basics Paco(paco6 pacotac)