proposition: Fact Σ2_transitive_spec t ψ : ⟪Σ2_transitive t⟫ ψ = mb_transitive mem (ψ t).
proof: Proof. reflexivity. Qed.
imports: List Arith Nat Lia Max Wellfounded Coq.Setoids.Setoid Undecidability.Shared.Libs.DLW.Utils(utils_tac utils_list finite) Undecidability.Shared.Libs.DLW.Vec(pos vec) Undecidability.FOL.TRAKHTENBROT(notations fol_ops fo_sig fo_terms fo_logic)