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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 | import org.qedeq.kernel.se.base.list.Element; | |
19 | ||
20 | ||
21 | /** | |
22 | * Rename bound subject variable. | |
23 | * This replacement can take place for a certain bound occurrence of the subject variable. | |
24 | * For example in this case we replace x by y in at the first occurrence. | |
25 | * <pre> | |
26 | * forall x A(x) | |
27 | * --------------- | |
28 | * forall y A(y) | |
29 | * </pre> | |
30 | * | |
31 | * @author Michael Meyling | |
32 | */ | |
33 | public interface Rename extends Reason { | |
34 | ||
35 | /** | |
36 | * Get this reason. | |
37 | * | |
38 | * @return This reason. | |
39 | */ | |
40 | public Rename getRename(); | |
41 | ||
42 | /** | |
43 | * Get reference to formula. Usually this a formula of type A(x) | |
44 | * | |
45 | * @return Reference to previously proved formula. | |
46 | */ | |
47 | public String getReference(); | |
48 | ||
49 | /** | |
50 | * Get original subject variable. Something like x. | |
51 | * | |
52 | * @return Subject variable. | |
53 | */ | |
54 | public Element getOriginalSubjectVariable(); | |
55 | ||
56 | /** | |
57 | * Get replacement subject variable. Something like y. | |
58 | * | |
59 | * @return Subject variable. | |
60 | */ | |
61 | public Element getReplacementSubjectVariable(); | |
62 | ||
63 | /** | |
64 | * Get bound occurrence to replace. Starts with 1. A value of 0 means no specification. | |
65 | * | |
66 | * @return Number of occurrence. | |
67 | */ | |
68 | public int getOccurrence(); | |
69 | ||
70 | } |
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