(* *)
(**************************************************************************)
-set "baseuri" "cic:/matita/logic/connectives/".
-
inductive True: Prop \def
I : True.
ex_intro2: \forall x:A. P x \to Q x \to ex2 A P Q.
definition iff :=
- \lambda A,B. (A -> B) \land (B -> A).
\ No newline at end of file
+ \lambda A,B. (A -> B) \land (B -> A).