-(* Note: "â¦\83G,Lâ¦\84 â\8a¢ U2 â¬\8c*[h] X2" can be "â¦\83G,Lâ¦\84 ⊢ X2 ➡*[h] U2" *)
-lemma nta_inv_lifts_sn (a) (h) (G):
- â\88\80L,T2,X2. â¦\83G,Lâ¦\84 â\8a¢ T2 :[a,h] X2 →
- â\88\80b,f,K. â¬\87*[b,f] L â\89\98 K â\86\92 â\88\80T1. â¬\86*[f] T1 ≘ T2 →
- â\88\83â\88\83U1,U2. â¦\83G,Kâ¦\84 â\8a¢ T1 :[a,h] U1 & â¬\86*[f] U1 â\89\98 U2 & â¦\83G,Lâ¦\84 â\8a¢ U2 â¬\8c*[h] X2 & â¦\83G,Lâ¦\84 â\8a¢ X2 ![a,h].
-#a #h #G #L #T2 #X2 #H #b #f #K #HLK #T1 #HT12
+(* Note: "â\9dªG, Lâ\9d« â\8a¢ U2 â¬\8c*[h] X2" can be "â\9dªG, Lâ\9d« ⊢ X2 ➡*[h] U2" *)
+lemma nta_inv_lifts_sn (h) (a) (G):
+ â\88\80L,T2,X2. â\9dªG,Lâ\9d« â\8a¢ T2 :[h,a] X2 →
+ â\88\80b,f,K. â\87©*[b,f] L â\89\98 K â\86\92 â\88\80T1. â\87§*[f] T1 ≘ T2 →
+ â\88\83â\88\83U1,U2. â\9dªG,Kâ\9d« â\8a¢ T1 :[h,a] U1 & â\87§*[f] U1 â\89\98 U2 & â\9dªG,Lâ\9d« â\8a¢ U2 â¬\8c*[h] X2 & â\9dªG,Lâ\9d« â\8a¢ X2 ![h,a].
+#h #a #G #L #T2 #X2 #H #b #f #K #HLK #T1 #HT12