qed.
lemma lsubr_cpcs_trans: ∀G,L1,T1,T2. ⦃G, L1⦄ ⊢ T1 ⬌* T2 →
- â\88\80L2. L2 â\8a\91 L1 → ⦃G, L2⦄ ⊢ T1 ⬌* T2.
+ â\88\80L2. L2 â«\83 L1 → ⦃G, L2⦄ ⊢ T1 ⬌* T2.
#G #L1 #T1 #T2 #HT12 elim (cpcs_inv_cprs … HT12) -HT12
/3 width=5 by cprs_div, lsubr_cprs_trans/
qed-.