update in delayed_updating

[helm.git] / matita / matita / contribs / lambdadelta / delayed_updating / substitution / lift_prototerm_after.ma

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 862e2d4cb8580109087238b9360963167b843427..95784343110555dd5f0fb5d41cbb6c0b8cec8f66 100644 (file)
--- 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