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4 (* ||A|| A project by Andrea Asperti *)
6 (* ||I|| Developers: *)
7 (* ||T|| The HELM team. *)
8 (* ||A|| http://helm.cs.unibo.it *)
10 (* \ / This file is distributed under the terms of the *)
11 (* v GNU General Public License Version 2 *)
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15 set "baseuri" "cic:/matita/RELATIONAL/BNot/defs".
17 include "logic/equality.ma".
19 include "Bool/defs.ma".
21 inductive BNot: Bool \to Bool \to Prop \def
22 | bnot_false: BNot false true
23 | bnot_true : BNot true false
26 (*CSC: the URI must disappear: there is a bug now *)
27 interpretation "boolean not predicate" 'rel_not x y =
28 (cic:/matita/RELATIONAL/BNot/defs/BNot.ind#xpointer(1/1) x y).
30 (* FG: we can not use - here for some reason *)
31 notation "hvbox(~ a break == b)"
32 non associative with precedence 95
33 for @{ 'rel_not $a $b}.