proposition: Lemma itebP {X: Type} {P: bool -> X} {b: bool} : (if b then P true else P false) = P b.
proof: Proof. by case: b. Qed.
imports: List PeanoNat Lia Relations.Relation_Operators Relations.Operators_Properties Undecidability.StackMachines(SSM) Undecidability.StackMachines.Util(CSSM_facts) Undecidability.SemiUnification.SemiU Undecidability.SemiUnification.Util(Enumerable) ssreflect ssrfun ssrbool