- a caracterization of the top elements of the local evironment

[helm.git] / matita / matita / contribs / lambda_delta / ground_2 / list.ma

diff --git a/matita/matita/contribs/lambda_delta/ground_2/list.ma b/matita/matita/contribs/lambda_delta/ground_2/list.ma
index 0d15cfe4f225df1f4810b4ca3f6d5065be8c8bb3..9a5ac0aeb4c7a45014829839d2e4e23f7d7f4c39 100644 (file)
--- 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
   ].