1 (* Copyright (C) 2004, HELM Team.
3 * This file is part of HELM, an Hypertextual, Electronic
4 * Library of Mathematics, developed at the Computer Science
5 * Department, University of Bologna, Italy.
7 * HELM is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or (at your option) any later version.
12 * HELM is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with HELM; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
22 * For details, see the HELM World-Wide-Web page,
23 * http://helm.cs.unibo.it/
32 [ t1 = term; SYMBOL <:unicode<lor>> (* ∨ *); t2 = term ->
33 return_term loc (Appl_symbol ("or", 0, [t1; t2]))
38 [ t1 = term; SYMBOL <:unicode<land>> (* ∧ *); t2 = term ->
39 return_term loc (Appl_symbol ("and", 0, [t1; t2]))
44 [ SYMBOL <:unicode<lnot>> (* ¬ *); t = term ->
45 return_term loc (Appl_symbol ("not", 0, [t])) ]
50 Disambiguate.add_symbol_choice "eq"
51 ("leibnitz's equality",
56 | _ -> raise Disambiguate.Invalid_choice
59 Cic.MutInd (HelmLibraryObjects.Logic.eq_URI, 0, []);