fact: Definition M_solutions B f n := M_opair ∅ (M_enc_stack B) ∈' f /\ forall k x y, k ∈' n -> M_opair k x ∈' f -> M_combinations B x y -> M_opair (σ k) y ∈' f.
imports: Undecidability.FOL.ZF Undecidability.FOL.Syntax.Facts Undecidability.FOL.Semantics.Tarski.FullFacts Undecidability.FOL.Sets(ZF) Undecidability.FOL.Sets.ZF Undecidability.FOL.Reductions.PCPb_to_ZF Lia Undecidability.PCP(PCP Util.PCP_facts Reductions.PCPb_iff_dPCPb) Undecidability(Shared.ListAutomation) Morphisms