(* CONTEXT-SENSITIVE PARALLEL EQUIVALENCE ON TERMS **************************)
definition cpcs: relation4 genv lenv term term ≝
- λG. LTC … (cpc G).
+ λG. CTC … (cpc G).
interpretation "context-sensitive parallel equivalence (term)"
'PConvStar G L T1 T2 = (cpcs G L T1 T2).
(* Basic_1: was: pc3_s *)
lemma cpcs_sym: ∀G,L. symmetric … (cpcs G L).
-#G #L @TC_symmetric // qed-. (**) (* auto fails even after normalize *)
+normalize /3 width=1 by cpc_sym, TC_symmetric/
+qed-.
lemma cpc_cpcs: ∀G,L,T1,T2. ⦃G, L⦄ ⊢ T1 ⬌ T2 → ⦃G, L⦄ ⊢ T1 ⬌* T2.
/2 width=1 by inj/ qed.