proposition: Lemma Forall_ext {X n} (p q : X -> Prop) (v : t X n) : (forall x, p x -> q x) -> Forall p v -> Forall q v.
proof: Proof. induction v; firstorder. Qed.
imports: Undecidability.SOL.SOL Undecidability.Shared.Dec Undecidability.Shared.Libs.PSL(Vectors) Undecidability.Synthetic(Definitions DecidabilityFacts EnumerabilityFacts ListEnumerabilityFacts ReducibilityFacts) EqdepFacts Eqdep_dec