Some notation moved to core_notation.

[helm.git] / helm / software / matita / library / logic / coimplication.ma

diff --git a/helm/software/matita/library/logic/coimplication.ma b/helm/software/matita/library/logic/coimplication.ma
index a8fc4a232fbbcfc3eadca0a4476632f10bce23da..67f04b90308b28e8632c9ddf266d7e86e99ff246 100644 (file)
--- a/helm/software/matita/library/logic/coimplication.ma
+++ b/helm/software/matita/library/logic/coimplication.ma
@@ -17,16 +17,7 @@ include "logic/connectives.ma".
 definition Iff : Prop \to Prop \to Prop \def
    \lambda A,B. (A \to B) \land (B \to A).
    
- (*CSC: the URI must disappear: there is a bug now *)
-interpretation "logical iff" 'iff x y = (cic:/matita/logic/coimplication/Iff.con x y).
-
-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 }.
+interpretation "logical iff" 'iff x y = (Iff x y).
 
 theorem iff_intro: \forall A,B. (A \to B) \to (B \to A) \to (A \liff B).
  unfold Iff. intros. split; intros; autobatch.