X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fmatita%2Ftests%2Fcoercions.ma;h=aec51ae8b5f699ea51ff97b06bf17fa2adced7fc;hb=41be5e85a1103a5b14495bb487995a6a88e79c48;hp=8a45f29295d067744e28346312b7fd5558393f60;hpb=0dbd5619f82e575948ba583317706b4e794f57eb;p=helm.git

diff --git a/helm/matita/tests/coercions.ma b/helm/matita/tests/coercions.ma
index 8a45f2929..aec51ae8b 100644
--- a/helm/matita/tests/coercions.ma
+++ b/helm/matita/tests/coercions.ma
@@ -1,3 +1,20 @@
+(**************************************************************************)
+(*       ___                                                              *)
+(*      ||M||                                                             *)
+(*      ||A||       A project by Andrea Asperti                           *)
+(*      ||T||                                                             *)
+(*      ||I||       Developers:                                           *)
+(*      ||T||         The HELM team.                                      *)
+(*      ||A||         http://helm.cs.unibo.it                             *)
+(*      \   /                                                             *)
+(*       \ /        This file is distributed under the terms of the       *)
+(*        v         GNU General Public License Version 2                  *)
+(*                                                                        *)
+(**************************************************************************)
+
+set "baseuri" "cic:/matita/tests/coercions/".
+include "coq.ma".
+
 inductive pos: Set \def
 | one : pos
 | next : pos \to pos.
@@ -24,15 +41,24 @@ coercion pos2nat.
 coercion nat2int.
 
 definition fst \def \lambda x,y:int.x.
-alias symbol "eq" (instance 0) = "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