fact: Definition ax_rep' phi := fun_rel' phi ~> ∀ ∃ ∀ $0 ∈' $1 <~> ∃ $0 ∈' $3 ∧ phi[$0 .: $1 .: Nat.add 4 >> var].
imports: Undecidability.FOL.Util.Syntax Undecidability.FOL.Util.FullTarski Undecidability.FOL.Util.FullDeduction Undecidability.FOL.ZF List