#T #T2 #_ #HT2 #IHT1 <(cpy_inv_refl_O2 … HT2) -HT2 //
qed-.
-lemma cpys_inv_lift1_eq: ∀G,L,U1,U2. ∀l,m:nat.
- ⦃G, L⦄ ⊢ U1 ▶*[l, m] U2 → ∀T1. ⬆[l, m] T1 ≡ U1 → U1 = U2.
+lemma cpys_inv_lift1_eq: ∀G,L,U1,U2,l,m.
+ ⦃G, L⦄ ⊢ U1 ▶*[l, yinj m] U2 → ∀T1. ⬆[l, m] T1 ≡ U1 → U1 = U2.
#G #L #U1 #U2 #l #m #H #T1 #HTU1 @(cpys_ind … H) -U2
/2 width=7 by cpy_inv_lift1_eq/
qed-.