X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fmatita%2Ftests%2Finversion.ma;h=f717cd1df7f17969a0ca6169cc21833e711f4754;hb=4167cea65ca58897d1a3dbb81ff95de5074700cc;hp=4f8c4c6d42b6560bd04872e007892776bab10ab0;hpb=650e3b3c9ff0b9cafb76a0edf8139a53446937ba;p=helm.git

diff --git a/helm/matita/tests/inversion.ma b/helm/matita/tests/inversion.ma
index 4f8c4c6d4..f717cd1df 100644
--- a/helm/matita/tests/inversion.ma
+++ b/helm/matita/tests/inversion.ma
@@ -28,21 +28,15 @@ alias symbol "eq" (instance 0) = "Coq's leibnitz's equality".
 theorem test_inversion: \forall n. le n O \to n=O.
  intros.
  (* inversion begins *)
- cut O=O.
-  (* goal 2: 0 = 0 *)
-  goal 7. reflexivity.
-  (* goal 1 *)
-  generalize in match Hcut.
-  apply (le_ind ? (\lambda x. O=x \to n=x) ? ? ? H).
-  (* first goal (left open) *)
-  intro. rewrite < H1.
-  clear Hcut.
-  (* second goal (closed) *)
-  goal 14.
-  simplify. intros.
-  discriminate H3.
-  (* inversion ends *)
+ cut (O=O);
+ [ 2: reflexivity;
+ | generalize in match Hcut.
+   apply (le_ind ? (\lambda x. O=x \to n=x) ? ? ? H);
+   [ intro. rewrite < H1. clear Hcut.
+   | simplify. intros. discriminate H3.
+   ]
   reflexivity.
+ ]
 qed.
 
 (* Piu' semplice e non lascia l'ipotesi inutile Hcut *)
@@ -51,13 +45,9 @@ theorem test_inversion2: \forall n. le n O \to n=O.
  intros.
  (* inversion begins *)
  generalize in match (refl_equal nat O).
- apply (le_ind ? (\lambda x. O=x \to n=x) ? ? ? H).
- (* first goal (left open) *)
- intro. rewrite < H1.
- (* second goal (closed) *)
- goal 13.
- simplify. intros.
- discriminate H3.
- (* inversion ends *)
+ apply (le_ind ? (\lambda x. O=x \to n=x) ? ? ? H);
+ [ intro. rewrite < H1.
+ | simplify. intros. discriminate H3.
+ ]
  reflexivity.
 qed.