-lemma mf_delta_drops (h) (G): â\88\80K,V1,V2. â¦\83G,Kâ¦\84 â\8a¢ V1 â\9e¡[h] V2 →
- ∀T,L,l. ⬇*[l] L ≘ K.ⓓV1 →
- â\88\80gv,lv. â¦\83G,Lâ¦\84 â\8a¢ â\97\8f[gv,â\87¡[lâ\86\90#l]lv]T â\9e¡[h] â\97\8f[gv,â\87¡[lâ\86\90â\86\91[â\86\91l]V2]lv]T.
+lemma mf_delta_drops (h) (G): â\88\80K,V1,V2. â\9dªG,Kâ\9d« â\8a¢ V1 â\9e¡[h,0] V2 →
+ ∀T,L,i. ⇩[i] L ≘ K.ⓓV1 →
+ â\88\80gv,lv. â\9dªG,Lâ\9d« â\8a¢ â\97\8f[gv,â\87¡[iâ\86\90#i]lv]T â\9e¡[h,0] â\97\8f[gv,â\87¡[iâ\86\90â\86\91[â\86\91i]V2]lv]T.