include "BNot/defs.ma".
inductive BEq (b1:Bool): Bool \to Bool \to Prop \def
- | beq_false: \forall b2. BNot b1 b2 \to BEq b1 false b2
+ | beq_false: \forall b2. (~b1 == b2) \to BEq b1 false b2
| beq_true : BEq b1 true b1
.
+
+(*CSC: the URI must disappear: there is a bug now *)
+interpretation "boolean coimplication predicate" 'rel_coimp x y z =
+ (cic:/matita/RELATIONAL/BEq/defs/BEq.ind#xpointer(1/1) x y z).
+
+notation "hvbox(a break * b break == c)"
+ non associative with precedence 95
+for @{ 'rel_coimp $a $b $c}.