fact: Variable (Σ : fo_signature) (e : rels Σ) (He : ar_rels _ e = 2).
imports: List Undecidability.Synthetic(Definitions ReducibilityFacts InformativeDefinitions InformativeReducibilityFacts) Undecidability.PCP(PCP) Undecidability.Shared.Libs.DLW.Utils(utils_tac utils_list finite) Undecidability.Shared.Libs.DLW.Vec(pos vec) Undecidability.FOL.TRAKHTENBROT(notations bpcp fo_sig fo_terms fo_logic fo_sat Sig_discrete Sig_noeq )