X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fdelayed_updating%2Freduction%2Fdfr_lift.ma;h=757497d4e852d77f5e3c32e07a8da8f4bf57dd6d;hb=3ca651e49d422d9f9a2b793841ae526baf02065c;hp=7273cd780dae13c2dc5359b91efea902d2c0437a;hpb=3729defa81f91b5f1259d628299bce9dbc5bfb7f;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/delayed_updating/reduction/dfr_lift.ma b/matita/matita/contribs/lambdadelta/delayed_updating/reduction/dfr_lift.ma
index 7273cd780..757497d4e 100644
--- a/matita/matita/contribs/lambdadelta/delayed_updating/reduction/dfr_lift.ma
+++ b/matita/matita/contribs/lambdadelta/delayed_updating/reduction/dfr_lift.ma
@@ -31,8 +31,7 @@ theorem dfr_lift_bi (f) (p) (q) (t1) (t2):
 @(ex_intro … ((↑[p●𝗔◗𝗟◗q]f)＠⧣❨n❩)) @and3_intro
 [ -Ht1 -Ht2
   <lift_rmap_L_dx >lift_path_L_sn
-  >list_append_rcons_sn in H1n; <reverse_append #H1n
-  <(lift_path_head … H1n) -H1n //
+  <(lift_path_head … H1n) in ⊢ (??%?); -H1n //
 | lapply (in_comp_lift_path_term f … Ht1) -Ht2 -Ht1 -H1n
   <lift_path_d_dx #Ht1 //
 | lapply (lift_term_eq_repl_dx f … Ht2) -Ht2 #Ht2 -Ht1
@@ -45,7 +44,7 @@ theorem dfr_lift_bi (f) (p) (q) (t1) (t2):
   @lift_term_eq_repl_sn
 (* Note: crux of the proof begins *)
   >list_append_rcons_sn in H1n; #H1n >lift_rmap_A_dx
-  /2 width=1 by tls_lift_rmap_append_closed/
+  /2 width=1 by tls_lift_rmap_closed/
 (* Note: crux of the proof ends *)
 ]
 qed.