-lemma ldrop_inv_skip1: â\88\80d,e,I,K1,V1,L2. â\86\93[d, e] K1. ð\9d\95\93{I} V1 â\89¡ L2 â\86\92 0 < d â\86\92
- â\88\83â\88\83K2,V2. â\86\93[d - 1, e] K1 â\89¡ K2 &
- â\86\91[d - 1, e] V2 â\89¡ V1 &
+lemma ldrop_inv_skip1: â\88\80d,e,I,K1,V1,L2. â\87\93[d, e] K1. ð\9d\95\93{I} V1 â\89¡ L2 â\86\92 0 < d â\86\92
+ â\88\83â\88\83K2,V2. â\87\93[d - 1, e] K1 â\89¡ K2 &
+ â\87\91[d - 1, e] V2 â\89¡ V1 &