More notation here and there.

[helm.git] / helm / matita / library / Z / z.ma

diff --git a/helm/matita/library/Z/z.ma b/helm/matita/library/Z/z.ma
index 997229763f5fc77f4a62790ffe009bd1d65cd0f0..423399ff2c85449324be1f97ee243930182e0114 100644 (file)
--- a/helm/matita/library/Z/z.ma
+++ b/helm/matita/library/Z/z.ma
@@ -113,7 +113,7 @@ elim x.
     right.intro.
     apply not_eq_OZ_pos n. symmetry. assumption.
   (* goal: x=pos y=pos *)
-    elim (decidable_eq_nat n n1:(Or (n=n1) ((n=n1) \to False))).
+    elim (decidable_eq_nat n n1:((n=n1) \lor ((n=n1) \to False))).
     left.apply eq_f.assumption.
     right.intros [H_inj].apply H. injection H_inj. assumption.
   (* goal: x=pos y=neg *)
@@ -126,7 +126,7 @@ elim x.
   (* goal: x=neg y=pos *)
     right. intro. apply not_eq_pos_neg n1 n. symmetry. assumption.
   (* goal: x=neg y=neg *)
-    elim (decidable_eq_nat n n1:(Or (n=n1) ((n=n1) \to False))).
+    elim (decidable_eq_nat n n1:((n=n1) \lor ((n=n1) \to False))).
     left.apply eq_f.assumption.
     right.intro.apply H.apply injective_neg.assumption.
 qed.