proposition: Corollary gen_dec C : decidable (gen C).
proof: Proof. exact: gen_dec. 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)