X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;ds=sidebyside;f=matita%2Ftests%2Finjection.ma;h=b8ddeaa17f22dd077719e691e760c7fff34931a3;hb=070e79b6e7ec986dd5fcdee24857956f6a4a9221;hp=7d9586fd1badd4482f9dc88667cb01e755f42b89;hpb=d723cac1efffbc8ef3ffcbaa96a2c390e2b8780e;p=helm.git

diff --git a/matita/tests/injection.ma b/matita/tests/injection.ma
index 7d9586fd1..b8ddeaa17 100644
--- a/matita/tests/injection.ma
+++ b/matita/tests/injection.ma
@@ -26,7 +26,7 @@ inductive t0 : Type :=
 
 theorem injection_test0: ∀n,n',m,m'. k0 n m = k0 n' m' → m = m'.
  intros;
- injection H;
+ destruct H;
  assumption.
 qed.
 
@@ -36,7 +36,7 @@ inductive t : Type → Type :=
  
 theorem injection_test1: ∀n,n'. k n = k n' → n = n'.
  intros;
- injection H;
+ destruct H;
  assumption.
 qed.
 
@@ -46,7 +46,7 @@ inductive tt (A:Type) : Type -> Type :=
  
 theorem injection_test2: ∀n,n',m,m'. k1 bool n n' = k1 bool m m' → n' = m'.
  intros;
- injection H;
+ destruct H;
  assumption.
 qed.
 
@@ -54,31 +54,9 @@ inductive ttree : Type → Type :=
    tempty: ttree nat
  | tnode : ∀A. ttree A → ttree A → ttree A.
 
-(* CSC: there is an undecidable unification problem here:
-    consider a constructor k : \forall x. f x -> i (g x)
-    The head of the outtype of the injection MutCase should be (f ?1)
-    such that (f ?1) unifies with (g d) [ where d is the Rel that binds
-    the corresponding right parameter in the outtype ]
-    Coq dodges the problem by generating an equality between sigma-types
-    (that state the existence of a ?1 such that ...)
-theorem injection_test3:
- ∀t,t'. tnode nat t tempty = tnode nat t' tempty → t = t'.
- intros;
- injection H;
- assumption.
-qed.
-
-theorem injection_test3:
- ∀t,t'.
-  tnode nat (tnode nat t t') tempty = tnode nat (tnode nat t' tempty) tempty →
-   t = t'.
- intros;
- injection H;
-*) 
-
 theorem injection_test4:
  ∀n,n',m,m'. k1 bool (S n) (S (S m)) = k1 bool (S n') (S (S (S m'))) → m = S m'.
  intros;
- injection H;
+ destruct H;
  assumption.
-qed.
\ No newline at end of file
+qed.