X-Git-Url: http://matita.cs.unibo.it/gitweb/?p=helm.git;a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fdelayed_updating%2Fsubstitution%2Flift_path_length.ma;h=cd68cacb8342883151b8ebd5bb72c9b5717a6166;hp=635a13e1db8174be04c1a63d7aa780d50d8c546e;hb=7008128d354c6e998a87bc2febe9f86ea714869c;hpb=d06053844638d88936d711b66fddbcca2a9add1c

diff --git a/matita/matita/contribs/lambdadelta/delayed_updating/substitution/lift_path_length.ma b/matita/matita/contribs/lambdadelta/delayed_updating/substitution/lift_path_length.ma
index 635a13e1d..cd68cacb8 100644
--- a/matita/matita/contribs/lambdadelta/delayed_updating/substitution/lift_path_length.ma
+++ b/matita/matita/contribs/lambdadelta/delayed_updating/substitution/lift_path_length.ma
@@ -20,7 +20,7 @@ include "ground/lib/list_length.ma".
 (* Constructions with list_length *******************************************)
 
 lemma lift_path_length (f) (p):
-      ❘p❘ = ❘↑[f]p❘.
+      ❘p❘ = ❘🠡[f]p❘.
 #f #p elim p -p // * [ #k ] #p #IH
 [ <lift_path_d_dx
 | <lift_path_m_dx