source: git/ntl/doc/copying.txt @ 26e030

spielwiese
Last change on this file since 26e030 was 26e030, checked in by Hans Schönemann <hannes@…>, 15 years ago
*hannes: update to 5.5.1 git-svn-id: file:///usr/local/Singular/svn/trunk@11949 2c84dea3-7e68-4137-9b89-c4e89433aadc
  • Property mode set to 100644
File size: 17.8 KB
Line 
1
2COPYRIGHT NOTICE
3
4NTL -- A Library for Doing Number Theory
5Copyright (C) 1996-2009  Victor Shoup
6
7The most recent version of NTL is available at http://www.shoup.net
8
9This program is free software; you can redistribute it and/or
10modify it under the terms of the GNU General Public License
11as published by the Free Software Foundation; either version 2
12of the License, or (at your option) any later version.
13
14This program is distributed in the hope that it will be useful,
15but WITHOUT ANY WARRANTY; without even the implied warranty of
16MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17GNU General Public License for more details.
18
19You should have received a copy of the GNU General Public License
20along with this program; if not, write to the Free Software
21Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
22
23This entire copyright notice should be placed in an appropriately
24conspicuous place accompanying all distributions of software that
25make use of NTL.
26
27The above terms apply to all of the software modules distributed with NTL,
28i.e., all source files in either the ntl-xxx.tar.gz or WinNTL-xxx.zip
29distributions.  In general, the individual files do not contain
30copyright notices.
31
32Note that the quad_float package is derived from the doubledouble package,
33originally developed by Keith Briggs, and also licensed unger the GNU GPL.
34The files quad_float.c and quad_float.h contain more detailed copyright
35notices.
36
37Note that the traditional long integer package used by NTL, lip.c, is derived
38from---and represents an extensive modification of---
39a package originally developed and copyrighted by Arjen Lenstra,
40who has agreed to renounce any copyright claims on the particular
41version of the long integer package appearing in NTL, so that the
42this package now is covered by the GNU GPL as well.
43
44Note that the alternative long integer package used by NTL is GMP,
45which is written by Torbjorn Granlund <tege@swox.com>.
46GMP is licensed under the terms of the GNU Lesser General Public License.
47
48Note that NTL makes use of the RSA Data Security, Inc. MD5 Message
49Digest Algorithm.
50
51Note that prior to version 4.0, NTL was distributed under the following terms:
52   NTL is freely available for research and educational purposes.
53   I don't want to attach any legalistic licensing restrictions on
54   users of NTL.
55   However, NTL should not be linked in a commercial program
56   (although using data in a commercial
57   product produced by a program that used NTL is fine).
58
59The hope is that the GNU GPL is actually less restrictive than these
60older terms;  however, in any circumstances such that GNU GPL is more
61restrictive, then the following rule is in force:
62versions prior to 4.0 may continue to be used under the old terms,
63but users of versions 4.0 or later should adhere to the terms of the GNU GPL.
64
65END COPYRIGHT NOTICE
66
67
68Following is the complete text of the GNU General Public License.
69Note that the copyright notice below applies to the text of the license
70itself, and not to NTL.
71
72
73
74                    GNU GENERAL PUBLIC LICENSE
75                       Version 2, June 1991
76
77 Copyright (C) 1989, 1991 Free Software Foundation, Inc.
78                       59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
79 Everyone is permitted to copy and distribute verbatim copies
80 of this license document, but changing it is not allowed.
81
82                            Preamble
83
84  The licenses for most software are designed to take away your
85freedom to share and change it.  By contrast, the GNU General Public
86License is intended to guarantee your freedom to share and change free
87software--to make sure the software is free for all its users.  This
88General Public License applies to most of the Free Software
89Foundation's software and to any other program whose authors commit to
90using it.  (Some other Free Software Foundation software is covered by
91the GNU Library General Public License instead.)  You can apply it to
92your programs, too.
93
94  When we speak of free software, we are referring to freedom, not
95price.  Our General Public Licenses are designed to make sure that you
96have the freedom to distribute copies of free software (and charge for
97this service if you wish), that you receive source code or can get it
98if you want it, that you can change the software or use pieces of it
99in new free programs; and that you know you can do these things.
100
101  To protect your rights, we need to make restrictions that forbid
102anyone to deny you these rights or to ask you to surrender the rights.
103These restrictions translate to certain responsibilities for you if you
104distribute copies of the software, or if you modify it.
105
106  For example, if you distribute copies of such a program, whether
107gratis or for a fee, you must give the recipients all the rights that
108you have.  You must make sure that they, too, receive or can get the
109source code.  And you must show them these terms so they know their
110rights.
111
112  We protect your rights with two steps: (1) copyright the software, and
113(2) offer you this license which gives you legal permission to copy,
114distribute and/or modify the software.
115
116  Also, for each author's protection and ours, we want to make certain
117that everyone understands that there is no warranty for this free
118software.  If the software is modified by someone else and passed on, we
119want its recipients to know that what they have is not the original, so
120that any problems introduced by others will not reflect on the original
121authors' reputations.
122
123  Finally, any free program is threatened constantly by software
124patents.  We wish to avoid the danger that redistributors of a free
125program will individually obtain patent licenses, in effect making the
126program proprietary.  To prevent this, we have made it clear that any
127patent must be licensed for everyone's free use or not licensed at all.
128
129  The precise terms and conditions for copying, distribution and
130modification follow.
131
132                    GNU GENERAL PUBLIC LICENSE
133   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
134
135  0. This License applies to any program or other work which contains
136a notice placed by the copyright holder saying it may be distributed
137under the terms of this General Public License.  The "Program", below,
138refers to any such program or work, and a "work based on the Program"
139means either the Program or any derivative work under copyright law:
140that is to say, a work containing the Program or a portion of it,
141either verbatim or with modifications and/or translated into another
142language.  (Hereinafter, translation is included without limitation in
143the term "modification".)  Each licensee is addressed as "you".
144
145Activities other than copying, distribution and modification are not
146covered by this License; they are outside its scope.  The act of
147running the Program is not restricted, and the output from the Program
148is covered only if its contents constitute a work based on the
149Program (independent of having been made by running the Program).
150Whether that is true depends on what the Program does.
151
152  1. You may copy and distribute verbatim copies of the Program's
153source code as you receive it, in any medium, provided that you
154conspicuously and appropriately publish on each copy an appropriate
155copyright notice and disclaimer of warranty; keep intact all the
156notices that refer to this License and to the absence of any warranty;
157and give any other recipients of the Program a copy of this License
158along with the Program.
159
160You may charge a fee for the physical act of transferring a copy, and
161you may at your option offer warranty protection in exchange for a fee.
162
163  2. You may modify your copy or copies of the Program or any portion
164of it, thus forming a work based on the Program, and copy and
165distribute such modifications or work under the terms of Section 1
166above, provided that you also meet all of these conditions:
167
168    a) You must cause the modified files to carry prominent notices
169    stating that you changed the files and the date of any change.
170
171    b) You must cause any work that you distribute or publish, that in
172    whole or in part contains or is derived from the Program or any
173    part thereof, to be licensed as a whole at no charge to all third
174    parties under the terms of this License.
175
176    c) If the modified program normally reads commands interactively
177    when run, you must cause it, when started running for such
178    interactive use in the most ordinary way, to print or display an
179    announcement including an appropriate copyright notice and a
180    notice that there is no warranty (or else, saying that you provide
181    a warranty) and that users may redistribute the program under
182    these conditions, and telling the user how to view a copy of this
183    License.  (Exception: if the Program itself is interactive but
184    does not normally print such an announcement, your work based on
185    the Program is not required to print an announcement.)
186
187These requirements apply to the modified work as a whole.  If
188identifiable sections of that work are not derived from the Program,
189and can be reasonably considered independent and separate works in
190themselves, then this License, and its terms, do not apply to those
191sections when you distribute them as separate works.  But when you
192distribute the same sections as part of a whole which is a work based
193on the Program, the distribution of the whole must be on the terms of
194this License, whose permissions for other licensees extend to the
195entire whole, and thus to each and every part regardless of who wrote it.
196
197Thus, it is not the intent of this section to claim rights or contest
198your rights to work written entirely by you; rather, the intent is to
199exercise the right to control the distribution of derivative or
200collective works based on the Program.
201
202In addition, mere aggregation of another work not based on the Program
203with the Program (or with a work based on the Program) on a volume of
204a storage or distribution medium does not bring the other work under
205the scope of this License.
206
207  3. You may copy and distribute the Program (or a work based on it,
208under Section 2) in object code or executable form under the terms of
209Sections 1 and 2 above provided that you also do one of the following:
210
211    a) Accompany it with the complete corresponding machine-readable
212    source code, which must be distributed under the terms of Sections
213    1 and 2 above on a medium customarily used for software interchange; or,
214
215    b) Accompany it with a written offer, valid for at least three
216    years, to give any third party, for a charge no more than your
217    cost of physically performing source distribution, a complete
218    machine-readable copy of the corresponding source code, to be
219    distributed under the terms of Sections 1 and 2 above on a medium
220    customarily used for software interchange; or,
221
222    c) Accompany it with the information you received as to the offer
223    to distribute corresponding source code.  (This alternative is
224    allowed only for noncommercial distribution and only if you
225    received the program in object code or executable form with such
226    an offer, in accord with Subsection b above.)
227
228The source code for a work means the preferred form of the work for
229making modifications to it.  For an executable work, complete source
230code means all the source code for all modules it contains, plus any
231associated interface definition files, plus the scripts used to
232control compilation and installation of the executable.  However, as a
233special exception, the source code distributed need not include
234anything that is normally distributed (in either source or binary
235form) with the major components (compiler, kernel, and so on) of the
236operating system on which the executable runs, unless that component
237itself accompanies the executable.
238
239If distribution of executable or object code is made by offering
240access to copy from a designated place, then offering equivalent
241access to copy the source code from the same place counts as
242distribution of the source code, even though third parties are not
243compelled to copy the source along with the object code.
244
245  4. You may not copy, modify, sublicense, or distribute the Program
246except as expressly provided under this License.  Any attempt
247otherwise to copy, modify, sublicense or distribute the Program is
248void, and will automatically terminate your rights under this License.
249However, parties who have received copies, or rights, from you under
250this License will not have their licenses terminated so long as such
251parties remain in full compliance.
252
253  5. You are not required to accept this License, since you have not
254signed it.  However, nothing else grants you permission to modify or
255distribute the Program or its derivative works.  These actions are
256prohibited by law if you do not accept this License.  Therefore, by
257modifying or distributing the Program (or any work based on the
258Program), you indicate your acceptance of this License to do so, and
259all its terms and conditions for copying, distributing or modifying
260the Program or works based on it.
261
262  6. Each time you redistribute the Program (or any work based on the
263Program), the recipient automatically receives a license from the
264original licensor to copy, distribute or modify the Program subject to
265these terms and conditions.  You may not impose any further
266restrictions on the recipients' exercise of the rights granted herein.
267You are not responsible for enforcing compliance by third parties to
268this License.
269
270  7. If, as a consequence of a court judgment or allegation of patent
271infringement or for any other reason (not limited to patent issues),
272conditions are imposed on you (whether by court order, agreement or
273otherwise) that contradict the conditions of this License, they do not
274excuse you from the conditions of this License.  If you cannot
275distribute so as to satisfy simultaneously your obligations under this
276License and any other pertinent obligations, then as a consequence you
277may not distribute the Program at all.  For example, if a patent
278license would not permit royalty-free redistribution of the Program by
279all those who receive copies directly or indirectly through you, then
280the only way you could satisfy both it and this License would be to
281refrain entirely from distribution of the Program.
282
283If any portion of this section is held invalid or unenforceable under
284any particular circumstance, the balance of the section is intended to
285apply and the section as a whole is intended to apply in other
286circumstances.
287
288It is not the purpose of this section to induce you to infringe any
289patents or other property right claims or to contest validity of any
290such claims; this section has the sole purpose of protecting the
291integrity of the free software distribution system, which is
292implemented by public license practices.  Many people have made
293generous contributions to the wide range of software distributed
294through that system in reliance on consistent application of that
295system; it is up to the author/donor to decide if he or she is willing
296to distribute software through any other system and a licensee cannot
297impose that choice.
298
299This section is intended to make thoroughly clear what is believed to
300be a consequence of the rest of this License.
301
302  8. If the distribution and/or use of the Program is restricted in
303certain countries either by patents or by copyrighted interfaces, the
304original copyright holder who places the Program under this License
305may add an explicit geographical distribution limitation excluding
306those countries, so that distribution is permitted only in or among
307countries not thus excluded.  In such case, this License incorporates
308the limitation as if written in the body of this License.
309
310  9. The Free Software Foundation may publish revised and/or new versions
311of the General Public License from time to time.  Such new versions will
312be similar in spirit to the present version, but may differ in detail to
313address new problems or concerns.
314
315Each version is given a distinguishing version number.  If the Program
316specifies a version number of this License which applies to it and "any
317later version", you have the option of following the terms and conditions
318either of that version or of any later version published by the Free
319Software Foundation.  If the Program does not specify a version number of
320this License, you may choose any version ever published by the Free Software
321Foundation.
322
323  10. If you wish to incorporate parts of the Program into other free
324programs whose distribution conditions are different, write to the author
325to ask for permission.  For software which is copyrighted by the Free
326Software Foundation, write to the Free Software Foundation; we sometimes
327make exceptions for this.  Our decision will be guided by the two goals
328of preserving the free status of all derivatives of our free software and
329of promoting the sharing and reuse of software generally.
330
331                            NO WARRANTY
332
333  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
334FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
335OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
336PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
337OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
338MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
339TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
340PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
341REPAIR OR CORRECTION.
342
343  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
344WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
345REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
346INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
347OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
348TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
349YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
350PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
351POSSIBILITY OF SUCH DAMAGES.
352
353                     END OF TERMS AND CONDITIONS
Note: See TracBrowser for help on using the repository browser.