-lemma cpxs_inv_cnx1 (h) (G) (L):
- ∀T1,T2. ❪G,L❫ ⊢ T1 ⬈*[h] T2 → ❪G,L❫ ⊢ ⬈𝐍[h] T1 → T1 ≛ T2.
-#h #G #L #T1 #T2 #H @(cpxs_ind_dx … H) -T1
+lemma cpxs_inv_cnx1 (G) (L):
+ ∀T1,T2. ❪G,L❫ ⊢ T1 ⬈* T2 → ❪G,L❫ ⊢ ⬈𝐍 T1 → T1 ≛ T2.
+#G #L #T1 #T2 #H @(cpxs_ind_dx … H) -T1