proposition: Lemma rNec s : prv s -> prv (fAX s).
proof: Proof. move => H. apply: rMP axAXT. apply: rRegAX. ApplyH H. Qed.
imports: mathcomp.ssreflect.ssreflect mathcomp(all_ssreflect) CompDecModal.libs(edone bcase fset base modular_hilbert) CompDecModal.CTL(CTL_def hilbert)