helm/software/matita/contribs/RELATIONAL/BNot/defs.ma

   1 (**************************************************************************)
   2 (*       ___                                                              *)
   3 (*      ||M||                                                             *)
   4 (*      ||A||       A project by Andrea Asperti                           *)
   5 (*      ||T||                                                             *)
   6 (*      ||I||       Developers:                                           *)
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   8 (*      ||A||         http://helm.cs.unibo.it                             *)
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  10 (*       \ /        This file is distributed under the terms of the       *)
  11 (*        v         GNU General Public License Version 2                  *)
  12 (*                                                                        *)
  13 (**************************************************************************)
  14
  15 set "baseuri" "cic:/matita/RELATIONAL/BNot/defs".
  16
  17 include "logic/equality.ma".
  18
  19 include "Bool/defs.ma".
  20
  21 inductive BNot: Bool \to Bool \to Prop \def
  22    | bnot_false: BNot false true
  23    | bnot_true : BNot true false
  24 .
  25
  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).
  29
  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}.