(* Main properties **********************************************************)
-theorem flifts_lifts: â\88\80T,f. â¬\86*[f]T ≘ ↑*[f]T.
+theorem flifts_lifts: â\88\80T,f. â\87§*[f]T ≘ ↑*[f]T.
#T elim T -T *
/2 width=1 by lifts_sort, lifts_lref, lifts_gref, lifts_bind, lifts_flat/
qed.
(* Main inversion properties ************************************************)
-theorem flifts_inv_lifts: â\88\80f,T1,T2. â¬\86*[f]T1 ≘ T2 → ↑*[f]T1 = T2.
+theorem flifts_inv_lifts: â\88\80f,T1,T2. â\87§*[f]T1 ≘ T2 → ↑*[f]T1 = T2.
#f #T1 #T2 #H elim H -f -T1 -T2 //
[ #f #i1 #i2 #H <(at_inv_total … H) //
| #f #p #I #V1 #V2 #T1 #T2 #_ #_ #IHV #IHT <IHV <IHT -V2 -T2 //