proposition: Lemma axARE s t : prv (fAR s t ---> t).
proof: Proof. rewrite -> axARf. exact: axAEl. Qed.
imports: mathcomp.ssreflect.ssreflect mathcomp(all_ssreflect) CompDecModal.libs(edone bcase fset base modular_hilbert) CompDecModal.CTL(CTL_def hilbert hilbert_hist)