X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fmatita%2Ftests%2Fcoercions.ma;h=aec51ae8b5f699ea51ff97b06bf17fa2adced7fc;hb=41be5e85a1103a5b14495bb487995a6a88e79c48;hp=663656e05faf57e38008a240a72f10f893267123;hpb=650e3b3c9ff0b9cafb76a0edf8139a53446937ba;p=helm.git

diff --git a/helm/matita/tests/coercions.ma b/helm/matita/tests/coercions.ma
index 663656e05..aec51ae8b 100644
--- a/helm/matita/tests/coercions.ma
+++ b/helm/matita/tests/coercions.ma
@@ -41,8 +41,24 @@ coercion pos2nat.
 coercion nat2int.
 
 definition fst \def \lambda x,y:int.x.
-alias symbol "eq" (instance 0) = "Coq's leibnitz's equality".
 
 theorem a: fst O one = fst (positive O) (next one).
 reflexivity.
 qed.
+
+definition double: 
+  \forall f:int \to int. pos \to int 
+\def 
+  \lambda f:int \to int. \lambda x : pos .f (nat2int x).
+  
+definition double1: 
+  \forall f:int \to int. pos \to int 
+\def 
+  \lambda f:int \to int. \lambda x : pos .f (pos2nat x).
+
+definition double2: 
+  \forall f:int \to int. pos \to int 
+\def 
+  \lambda f:int \to int. \lambda x : pos .f (nat2int (pos2nat x)).
+  
+  
\ No newline at end of file