X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fmatita%2Ftests%2Fcoercions.ma;h=3d788a813d80221ed63fe23a83cb0fc6ceaca571;hb=0972948bb0b578df99c1bf6ae7c805418b11206a;hp=1d841d16ebc2f3cad7299d9ec30cf9198ffa81c8;hpb=456f7d82d3cf6732daa36bb07d06c23c4a60beda;p=helm.git

diff --git a/helm/software/matita/tests/coercions.ma b/helm/software/matita/tests/coercions.ma
index 1d841d16e..3d788a813 100644
--- a/helm/software/matita/tests/coercions.ma
+++ b/helm/software/matita/tests/coercions.ma
@@ -59,10 +59,14 @@ definition double2:
 \def 
   \lambda f:int \to int. \lambda x : pos .f (nat2int (pos2nat x)).
 
+(* This used to test eq_f as a coercion. However, posing both eq_f and sym_eq
+   as coercions made the qed time of some TPTP problems reach infty.
+   Thus eq_f is no longer a coercion (nor is sym_eq).
 theorem coercion_svelta : \forall T,S:Type.\forall f:T \to S.\forall x,y:T.x=y \to f y = f x.
   intros.
   apply ((\lambda h:f y = f x.h) H).
 qed.
+*)
 
 variant pos2nat' : ? \def pos2nat.
 
@@ -108,6 +112,23 @@ definition mapmult:  \forall n:nat.\forall l:listn nat n. nat \to nat \to nat \d
   \lambda n:nat.\lambda l:listn nat n.\lambda m,o:nat.
   l (m m) o (o o o).
 
+axiom T0 : Type.
+axiom T1 : Type.
+axiom T2 : Type.
+axiom T3 : Type.
+
+axiom c1 : T0 -> T1.
+axiom c2 : T1 -> T2.
+axiom c3 : T2 -> T3.
+axiom c4 : T2 -> T1.
+
+coercion cic:/matita/tests/coercions/c1.con.
+coercion cic:/matita/tests/coercions/c2.con.
+coercion cic:/matita/tests/coercions/c3.con.
+coercion cic:/matita/tests/coercions/c4.con.
+
+
+
   
   
  
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