X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fmatita%2Fcore_notation.moo;h=9891129afa0d1bcf3c92102eb6cded9822f4f946;hb=42c44d828983e4ea2d115eba20a8020b62108384;hp=1ea2f922bc55211f29c03acc9533d9f3257ca0b8;hpb=1a28cedd1ef1a9ef608dce25b058c6e2e82c34c3;p=helm.git

diff --git a/helm/software/matita/core_notation.moo b/helm/software/matita/core_notation.moo
index 1ea2f922b..9891129af 100644
--- a/helm/software/matita/core_notation.moo
+++ b/helm/software/matita/core_notation.moo
@@ -137,6 +137,15 @@ notation "hvbox(\lnot a)"
   non associative with precedence 40
 for @{ 'not $a }.
 
+notation > "hvbox(a break \liff b)" 
+  left associative with precedence 25
+for @{ 'iff $a $b }.
+
+notation "hvbox(a break \leftrightarrow b)" 
+  left associative with precedence 25
+for @{ 'iff $a $b }.
+
+
 notation "hvbox(\Omega \sup term 90 A)" non associative with precedence 70
 for @{ 'powerset $A }.