X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fmatita%2Flibrary%2Fnat%2Fcongruence.ma;h=0a635ff78d9dc98ce0e68bae63b028a218ef7b64;hb=647b419e96770d90a82d7a9e5e8843566a9f93ee;hp=4266d3f6ffb22412d869bd4a357237937e3dcc67;hpb=4dc47c9675ffd5fa50296ffaa9b5997501518c98;p=helm.git

diff --git a/helm/software/matita/library/nat/congruence.ma b/helm/software/matita/library/nat/congruence.ma
index 4266d3f6f..0a635ff78 100644
--- a/helm/software/matita/library/nat/congruence.ma
+++ b/helm/software/matita/library/nat/congruence.ma
@@ -1,5 +1,5 @@
 (**************************************************************************)
-(*       ___	                                                          *)
+(*       ___	                                                            *)
 (*      ||M||                                                             *)
 (*      ||A||       A project by Andrea Asperti                           *)
 (*      ||T||                                                             *)
@@ -23,10 +23,6 @@ definition congruent: nat \to nat \to nat \to Prop \def
 
 interpretation "congruent" 'congruent n m p = (congruent n m p).
 
-notation < "hvbox(n break \cong\sub p m)"
-  (*non associative*) with precedence 45
-for @{ 'congruent $n $m $p }.
-
 theorem congruent_n_n: \forall n,p:nat.congruent n n p.
 intros.unfold congruent.reflexivity.
 qed.