fact: Definition app_norm := (app_nil_l, app_nil_r, @app_assoc', @repeat_app', @repeat_app_appP, @repeat_singP _ §0, @cons_repeat_app _ §0).
imports: Relation_Operators Operators_Properties Lia PeanoNat List Undecidability.StackMachines.Reductions.CM1_HALT_to_SMNdl_UB.SMX_facts Undecidability.StackMachines.Util(Nat_facts List_facts) ssreflect ssrbool ssrfun