X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fmatita%2Flibrary%2FZ%2Ftimes.ma;h=eefe4af7ead7d2f818216c44c6c9174fe298ccad;hb=395bcb2796cb9edcdb792579341c2271a8d1adaf;hp=742ef5462022e3be9a3cdc0f42f262a947c891fa;hpb=4dc47c9675ffd5fa50296ffaa9b5997501518c98;p=helm.git

diff --git a/helm/software/matita/library/Z/times.ma b/helm/software/matita/library/Z/times.ma
index 742ef5462..eefe4af7e 100644
--- a/helm/software/matita/library/Z/times.ma
+++ b/helm/software/matita/library/Z/times.ma
@@ -248,13 +248,3 @@ qed.
 variant distr_Ztimes_Zplus: \forall x,y,z.
 x * (y + z) = x*y + x*z \def
 distributive_Ztimes_Zplus.
-
-theorem eq_plus_Zplus: \forall n,m:nat. Z_of_nat (n+m) =
-Z_of_nat n + Z_of_nat m.
-intro.cases n;intro
-  [reflexivity
-  |cases m
-    [simplify.rewrite < plus_n_O.reflexivity
-    |simplify.reflexivity.
-    ]]
-qed.