X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambda_delta%2Fground_2%2Flist.ma;h=9a5ac0aeb4c7a45014829839d2e4e23f7d7f4c39;hb=9def1b8a298aac85a7abdc75c4a33657fe7e6df7;hp=0d15cfe4f225df1f4810b4ca3f6d5065be8c8bb3;hpb=636c25914e83819c2f529edc891a7eb899499a97;p=helm.git

diff --git a/matita/matita/contribs/lambda_delta/ground_2/list.ma b/matita/matita/contribs/lambda_delta/ground_2/list.ma
index 0d15cfe4f..9a5ac0aeb 100644
--- a/matita/matita/contribs/lambda_delta/ground_2/list.ma
+++ b/matita/matita/contribs/lambda_delta/ground_2/list.ma
@@ -26,7 +26,7 @@ interpretation "cons (list)" 'Cons hd tl = (cons ? hd tl).
 
 let rec all A (R:predicate A) (l:list A) on l ≝
   match l with
-  [ nil        ⇒ True
+  [ nil        ⇒ ⊤
   | cons hd tl ⇒ R hd ∧ all A R tl
   ].