(* *)
(**************************************************************************)
-include "delayed_updating/reduction/ifr.ma".
include "delayed_updating/reduction/dfr.ma".
+include "delayed_updating/reduction/ifr.ma".
+include "delayed_updating/substitution/fsubst_lift.ma".
(* DELAYED FOCUSED REDUCTION ************************************************)
-lemma dfr_lift_bi (f) (p) (q) (t1) (t2):
+lemma dfr_lift_bi (f) (p) (q) (t1) (t2): ÆŽt1 â
t1 âĄðð[p,q] t2 â â[f]t1 âĄð[âp,âq] â[f]t2.
-#f #p #q #t1 #t2
-* #b #Hr #Hb
+#f #p #q #t1 #t2 #Ht1
+* -t2 #b #Hr #Hb