X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fdelayed_updating%2Freduction%2Fdfr_ifr.ma;h=9a713d1e550c477a26fe535146c414c8a7232c2c;hb=cfd201c62dd9b854bfb4ada648d3e556b29fac3a;hp=015958b54db1ff5e19eed95585526d4ecb90d181;hpb=55ea9387fd71564c629fe3f47fd9bac59c4befb9;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/delayed_updating/reduction/dfr_ifr.ma b/matita/matita/contribs/lambdadelta/delayed_updating/reduction/dfr_ifr.ma
index 015958b54..9a713d1e5 100644
--- a/matita/matita/contribs/lambdadelta/delayed_updating/reduction/dfr_ifr.ma
+++ b/matita/matita/contribs/lambdadelta/delayed_updating/reduction/dfr_ifr.ma
@@ -12,12 +12,13 @@
 (*                                                                        *)
 (**************************************************************************)
 
-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): Ƭt1 →
       t1 ➡𝐝𝐟[p,q] t2 → ↑[f]t1 ➡𝐟[⊗p,⊗q] ↑[f]t2.
-#f #p #q #t1 #t2
-* #b #Hr #Hb
+#f #p #q #t1 #t2 #Ht1
+* -t2 #b #Hr #Hb