(* Properties with atomic arity assignment for terms ************************)
(* Note: lemma 500 *)
-(* Basic_2A1: was: cpx_lpx_aaa_conf *)
+(* Basic_2A1: uses: cpx_lpx_aaa_conf *)
lemma cpx_aaa_conf_lfpx: ∀h,G,L1,T1,A. ⦃G, L1⦄ ⊢ T1 ⁝ A →
∀T2. ⦃G, L1⦄ ⊢ T1 ⬈[h] T2 →
∀L2. ⦃G, L1⦄ ⊢ ⬈[h, T1] L2 → ⦃G, L2⦄ ⊢ T2 ⁝ A.