proposition: Lemma minSignatureValiditiyUndec : @undecidable (@form sig_empty sig_binary FullSyntax.full_operators falsity_on) valid.
proof: Proof. apply (undecidability_from_reducibility H10UPC_SAT_undec). exact fullFragValidReduction. Qed.
imports: Undecidability.DiophantineConstraints(H10C H10C_undec) Undecidability.FOL.Syntax(Core BinSig) Undecidability.Synthetic(Definitions Undecidability ReducibilityFacts)