X-Git-Url: http://matita.cs.unibo.it/gitweb/?p=helm.git;a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fdelayed_updating%2Fsubstitution%2Flift_prototerm_after.ma;h=95784343110555dd5f0fb5d41cbb6c0b8cec8f66;hp=862e2d4cb8580109087238b9360963167b843427;hb=7008128d354c6e998a87bc2febe9f86ea714869c;hpb=d06053844638d88936d711b66fddbcca2a9add1c

diff --git a/matita/matita/contribs/lambdadelta/delayed_updating/substitution/lift_prototerm_after.ma b/matita/matita/contribs/lambdadelta/delayed_updating/substitution/lift_prototerm_after.ma
index 862e2d4cb..957843431 100644
--- a/matita/matita/contribs/lambdadelta/delayed_updating/substitution/lift_prototerm_after.ma
+++ b/matita/matita/contribs/lambdadelta/delayed_updating/substitution/lift_prototerm_after.ma
@@ -20,7 +20,7 @@ include "delayed_updating/substitution/lift_path_after.ma".
 (* Constructions with tr_after **********************************************)
 
 lemma lift_term_after (f) (g) (t):
-      ↑[g]↑[f]t ⇔ ↑[g∘f]t.
+      🠡[g]🠡[f]t ⇔ 🠡[g∘f]t.
 #f #g #t @subset_eq_trans
 [
 | @subset_inclusion_ext_f1_compose