proposition: Theorem SysF_TYP_undec : undecidable SysF_TYP.
proof: Proof. apply (undecidability_from_reducibility LU2SemiU_undec). exact LU2SemiU_to_SysF_TYP.reduction. Qed.
imports: Undecidability.Synthetic.Undecidability Undecidability.SystemF.SysF Undecidability.DiophantineConstraints.H10C_undec Undecidability.SemiUnification.SemiU_undec