proposition: Theorem UM_universal s : (exists (M:cmodel) (w:M), eval s w) -> (exists (w:UM), eval s w).
proof: Proof. exact: UM_universal. Qed.
imports: mathcomp.ssreflect.ssreflect mathcomp(all_ssreflect) CompDecModal.libs(edone bcase fset modular_hilbert base sltype) CompDecModal.K(K_def demo hilbert_ref gentzen universal_model)