-lemma cpm_fwd_cpx: ∀n,h,G,L,T1,T2. ❪G,L❫ ⊢ T1 ➡[n,h] T2 → ❪G,L❫ ⊢ T1 ⬈[h] T2.
-#n #h #G #L #T1 #T2 * #c #Hc #H elim H -L -T1 -T2
+lemma cpm_fwd_cpx: ∀h,n,G,L,T1,T2. ❪G,L❫ ⊢ T1 ➡[h,n] T2 → ❪G,L❫ ⊢ T1 ⬈[h] T2.
+#h #n #G #L #T1 #T2 * #c #Hc #H elim H -L -T1 -T2