(* Basic_2A1: was: cprs_inv_lref1 *)
lemma cprs_inv_lref1_drops (h) (G): ∀L,T2,i. ⦃G,L⦄ ⊢ #i ➡*[h] T2 →
∨∨ T2 = #i
- | â\88\83â\88\83K,V1,T1. â¬\87*[i] L ≘ K.ⓓV1 & ⦃G,K⦄ ⊢ V1 ➡*[h] T1 &
- â¬\86*[↑i] T1 ≘ T2.
+ | â\88\83â\88\83K,V1,T1. â\87©*[i] L ≘ K.ⓓV1 & ⦃G,K⦄ ⊢ V1 ➡*[h] T1 &
+ â\87§*[↑i] T1 ≘ T2.
#h #G #L #T2 #i #H elim (cpms_inv_lref1_drops … H) -H *
[ /2 width=1 by or_introl/
| /3 width=6 by ex3_3_intro, or_intror/