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1 | /* This file is part of the project "Hilbert II" - http://www.qedeq.org | |
2 | * | |
3 | * Copyright 2000-2013, Michael Meyling <mime@qedeq.org>. | |
4 | * | |
5 | * "Hilbert II" is free software; you can redistribute | |
6 | * it and/or modify it under the terms of the GNU General Public | |
7 | * License as published by the Free Software Foundation; either | |
8 | * version 2 of the License, or (at your option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | */ | |
15 | ||
16 | package org.qedeq.kernel.se.base.module; | |
17 | ||
18 | ||
19 | /** | |
20 | * Usage of addition of already proven formula. | |
21 | * <pre> | |
22 | * A | |
23 | * ------ | |
24 | * A | |
25 | * </pre> | |
26 | * | |
27 | * @author Michael Meyling | |
28 | */ | |
29 | public interface Add extends Reason { | |
30 | ||
31 | /** | |
32 | * Get this reason. | |
33 | * | |
34 | * @return This reason. | |
35 | */ | |
36 | public Add getAdd(); | |
37 | ||
38 | /** | |
39 | * Get reference to formula. | |
40 | * | |
41 | * @return Reference to previously proved formula. | |
42 | */ | |
43 | public String getReference(); | |
44 | ||
45 | } |
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