(* Basic_1: was: pr3_gen_lref *)
(* Basic_2A1: was: cprs_inv_lref1 *)
-lemma cprs_inv_lref1_drops (h) (G): â\88\80L,T2,i. â\9dªG,Lâ\9d« ⊢ #i ➡*[h,0] T2 →
+lemma cprs_inv_lref1_drops (h) (G): â\88\80L,T2,i. â\9d¨G,Lâ\9d© ⊢ #i ➡*[h,0] T2 →
∨∨ T2 = #i
- | â\88\83â\88\83K,V1,T1. â\87©[i] L â\89\98 K.â\93\93V1 & â\9dªG,Kâ\9d« ⊢ V1 ➡*[h,0] T1 &
+ | â\88\83â\88\83K,V1,T1. â\87©[i] L â\89\98 K.â\93\93V1 & â\9d¨G,Kâ\9d© ⊢ V1 ➡*[h,0] T1 &
⇧[↑i] T1 ≘ T2.
#h #G #L #T2 #i #H elim (cpms_inv_lref1_drops … H) -H *
[ /2 width=1 by or_introl/