proposition: Theorem PCP_HFD B : PCPb B -> HFeq ⊢ solvable B.
proof: Proof. rewrite PCPb_iff_dPCPb. apply dPCP_HFD. Qed.
imports: Undecidability.FOL.ZF Undecidability.FOL.Syntax.Facts Undecidability.FOL.Semantics.Tarski.FullFacts Undecidability.FOL.Sets.ZF Undecidability.FOL.Reductions.PCPb_to_HF Undecidability.PCP(PCP Util.PCP_facts Reductions.PCPb_iff_dPCPb) Undecidability(Shared.ListAutomation)