X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fdelayed_updating%2Fsubstitution%2Flift_path_uni.ma;h=0943306582c4203738402c9e571cd6215620026a;hb=5c2d38b46908f662cbb717156b29101ff30f8352;hp=f68010b32a4eabfcd6a6d72f99b42988f3ebe574;hpb=3af42b8f2cb1956eed14edcc0adb9df92601f248;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/delayed_updating/substitution/lift_path_uni.ma b/matita/matita/contribs/lambdadelta/delayed_updating/substitution/lift_path_uni.ma
index f68010b32..094330658 100644
--- a/matita/matita/contribs/lambdadelta/delayed_updating/substitution/lift_path_uni.ma
+++ b/matita/matita/contribs/lambdadelta/delayed_updating/substitution/lift_path_uni.ma
@@ -15,14 +15,15 @@
 include "delayed_updating/substitution/lift_path_id.ma".
 include "ground/relocation/tr_uni_pap.ma".
 include "ground/relocation/tr_uni_tls.ma".
+include "ground/arith/nat_pred_succ.ma".
 
 (* LIFT FOR PATH ************************************************************)
 
 (* Constructions with tr_uni ************************************************)
 
-lemma lift_path_d_sn_uni (p) (m) (n):
-      (𝗱(n+m)◗p) = ↑[𝐮❨m❩](𝗱(n)◗p).
-#p #m #n
+lemma lift_path_d_sn_uni (p) (n) (k):
+      (𝗱(k+n)◗p) = ↑[𝐮❨n❩](𝗱k◗p).
+#p #n #k
 <lift_path_d_sn <tr_uni_pap >nsucc_pnpred
 <tr_tls_succ_uni //
 qed.