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1 This is the notice of license and warranty for ASCEND IV.
2 The authors of ASCEND will consider other licensing arrangements
3 on a case-by-case basis. This license applies to all ASCEND
4 interface, compiler, and solver programs, but not to third
5 party software subsystems (Tcl/Tk/solving codes) that we
6 may call.
7
8 GNU GENERAL PUBLIC LICENSE
9 Version 2, June 1991
10
11 Copyright (C) 1989, 1991
12 Free Software Foundation, Inc.
13 675 Mass Ave, Cambridge, MA 02139, USA
14
15 Everyone is permitted to copy and distribute verbatim
16 copies of this license document, but changing it is not
17 allowed.
18
19 Preamble
20
21 The licenses for most software are designed to take away
22 your freedom to share and change it. By contrast, the GNU
23 General Public License is intended to guarantee your
24 freedom to share and change free software--to make sure the
25 software is free for all its users. This General Public
26 License applies to most of the Free Software Foundation's
27 software and to any other program whose authors commit to
28 using it. (Some other Free Software Foundation software is
29 covered by the GNU Library General Public License
30 instead.) You can apply it to your programs, too.
31
32 When we speak of free software, we are referring to
33 freedom, not price. Our General Public Licenses are
34 designed to make sure that you have the freedom to
35 distribute copies of free software (and charge for this
36 service if you wish), that you receive source code or can
37 get it if you want it, that you can change the software or
38 use pieces of it in new free programs; and that you know
39 you can do these things.
40
41 To protect your rights, we need to make restrictions that
42 forbid anyone to deny you these rights or to ask you to
43 surrender the rights. These restrictions translate to
44 certain responsibilities for you if you distribute copies
45 of the software, or if you modify it.
46
47 For example, if you distribute copies of such a program,
48 whether gratis or for a fee, you must give the recipients
49 all the rights that you have. You must make sure that
50 they, too, receive or can get the source code. And you
51 must show them these terms so they know their rights.
52
53 We protect your rights with two steps: (1) copyright the
54 software, and (2) offer you this license which gives you
55 legal permission to copy, distribute and/or modify the
56 software.
57
58 Also, for each author's protection and ours, we want to
59 make certain that everyone understands that there is no
60 warranty for this free software. If the software is
61 modified by someone else and passed on, we want its
62 recipients to know that what they have is not the original,
63 so that any problems introduced by others will not reflect
64 on the original authors' reputations.
65
66 Finally, any free program is threatened constantly by
67 software patents. We wish to avoid the danger that
68 redistributors of a free program will individually obtain
69 patent licenses, in effect making the program proprietary.
70 To prevent this, we have made it clear that any patent must
71 be licensed for everyone's free use or not licensed at
72 all.
73
74 The precise terms and conditions for copying, distribution
75 and modification follow.
76
77 GNU GENERAL PUBLIC LICENSE
78 TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND
79 MODIFICATION
80
81 0. This License applies to any program or other work
82 which contains a notice placed by the copyright holder
83 saying it may be distributed under the terms of this
84 General Public License. The "Program", below, refers to
85 any such program or work, and a "work based on the Program"
86 means either the Program or any derivative work under
87 copyright law: that is to say, a work containing the
88 Program or a portion of it, either verbatim or with
89 modifications and/or translated into another language.
90 (Hereinafter, translation is included without limitation in
91 the term "modification".) Each licensee is addressed as
92 "you".
93
94 Activities other than copying, distribution and
95 modification are not covered by this License; they are
96 outside its scope. The act of running the Program is not
97 restricted, and the output from the Program is covered only
98 if its contents constitute a work based on the Program
99 (independent of having been made by running the Program).
100 Whether that is true depends on what the Program does.
101
102 1. You may copy and distribute verbatim copies of the
103 Program's source code as you receive it, in any medium,
104 provided that you conspicuously and appropriately publish
105 on each copy an appropriate copyright notice and disclaimer
106 of warranty; keep intact all the notices that refer to this
107 License and to the absence of any warranty; and give any
108 other recipients of the Program a copy of this License
109 along with the Program.
110
111 You may charge a fee for the physical act of transferring a
112 copy, and you may at your option offer warranty protection
113 in exchange for a fee.
114
115 2. You may modify your copy or copies of the Program or
116 any portion of it, thus forming a work based on the
117 Program, and copy and distribute such modifications or work
118 under the terms of Section 1 above, provided that you also
119 meet all of these conditions:
120
121 a) You must cause the modified files to carry prominent
122 notices stating that you changed the files and the date
123 of any change.
124
125 b) You must cause any work that you distribute or
126 publish, that in whole or in part contains or is
127 derived from the Program or any part thereof, to be
128 licensed as a whole at no charge to all third parties
129 under the terms of this License.
130
131 c) If the modified program normally reads commands
132 interactively when run, you must cause it, when started
133 running for such interactive use in the most ordinary
134 way, to print or display an announcement including an
135 appropriate copyright notice and a notice that there is
136 no warranty (or else, saying that you provide a
137 warranty) and that users may redistribute the program
138 under these conditions, and telling the user how to
139 view a copy of this License. (Exception: if the
140 Program itself is interactive but does not normally
141 print such an announcement, your work based on the
142 Program is not required to print an announcement.)
143
144 These requirements apply to the modified work as a whole.
145 If identifiable sections of that work are not derived from
146 the Program, and can be reasonably considered independent
147 and separate works in themselves, then this License, and
148 its terms, do not apply to those sections when you
149 distribute them as separate works. But when you distribute
150 the same sections as part of a whole which is a work based
151 on the Program, the distribution of the whole must be on
152 the terms of this License, whose permissions for other
153 licensees extend to the entire whole, and thus to each and
154 every part regardless of who wrote it.
155
156 Thus, it is not the intent of this section to claim rights
157 or contest your rights to work written entirely by you;
158 rather, the intent is to exercise the right to control the
159 distribution of derivative or collective works based on the
160 Program.
161
162 In addition, mere aggregation of another work not based on
163 the Program with the Program (or with a work based on the
164 Program) on a volume of a storage or distribution medium
165 does not bring the other work under the scope of this
166 License.
167
168 3. You may copy and distribute the Program (or a work
169 based on it, under Section 2) in object code or executable
170 form under the terms of Sections 1 and 2 above provided
171 that you also do one of the following:
172
173 a) Accompany it with the complete corresponding
174 machine-readable source code, which must be distributed
175 under the terms of Sections 1 and 2 above on a medium
176 customarily used for software interchange; or,
177
178 b) Accompany it with a written offer, valid for at
179 least three years, to give any third party, for a
180 charge no more than your cost of physically performing
181 source distribution, a complete machine-readable copy
182 of the corresponding source code, to be distributed
183 under the terms of Sections 1 and 2 above on a medium
184 customarily used for software interchange; or,
185
186 c) Accompany it with the information you received as to
187 the offer to distribute corresponding source code.
188 (This alternative is allowed only for noncommercial
189 distribution and only if you received the program in
190 object code or executable form with such an offer, in
191 accord with Subsection b above.)
192
193 The source code for a work means the preferred form of the
194 work for making modifications to it. For an executable
195 work, complete source code means all the source code for
196 all modules it contains, plus any associated interface
197 definition files, plus the scripts used to control
198 compilation and installation of the executable. However,
199 as a special exception, the source code distributed need
200 not include anything that is normally distributed (in
201 either source or binary form) with the major components
202 (compiler, kernel, and so on) of the operating system on
203 which the executable runs, unless that component itself
204 accompanies the executable.
205
206 If distribution of executable or object code is made by
207 offering access to copy from a designated place, then
208 offering equivalent access to copy the source code from the
209 same place counts as distribution of the source code, even
210 though third parties are not compelled to copy the source
211 along with the object code.
212
213 4. You may not copy, modify, sublicense, or distribute
214 the Program except as expressly provided under this
215 License. Any attempt otherwise to copy, modify, sublicense
216 or distribute the Program is void, and will automatically
217 terminate your rights under this License. However, parties
218 who have received copies, or rights, from you under this
219 License will not have their licenses terminated so long as
220 such parties remain in full compliance.
221
222 5. You are not required to accept this License, since you
223 have not signed it. However, nothing else grants you
224 permission to modify or distribute the Program or its
225 derivative works. These actions are prohibited by law if
226 you do not accept this License. Therefore, by modifying or
227 distributing the Program (or any work based on the
228 Program), you indicate your acceptance of this License to
229 do so, and all its terms and conditions for copying,
230 distributing or modifying the Program or works based on
231 it.
232
233 6. Each time you redistribute the Program (or any work
234 based on the Program), the recipient automatically receives
235 a license from the original licensor to copy, distribute or
236 modify the Program subject to these terms and conditions.
237 You may not impose any further restrictions on the
238 recipients' exercise of the rights granted herein. You are
239 not responsible for enforcing compliance by third parties
240 to this License.
241
242 7. If, as a consequence of a court judgment or allegation
243 of patent infringement or for any other reason (not limited
244 to patent issues), conditions are imposed on you (whether
245 by court order, agreement or otherwise) that contradict the
246 conditions of this License, they do not excuse you from the
247 conditions of this License. If you cannot distribute so as
248 to satisfy simultaneously your obligations under this
249 License and any other pertinent obligations, then as a
250 consequence you may not distribute the Program at all. For
251 example, if a patent license would not permit royalty-free
252 redistribution of the Program by all those who receive
253 copies directly or indirectly through you, then the only
254 way you could satisfy both it and this License would be to
255 refrain entirely from distribution of the Program.
256
257 If any portion of this section is held invalid or
258 unenforceable under any particular circumstance, the
259 balance of the section is intended to apply and the section
260 as a whole is intended to apply in other circumstances.
261
262 It is not the purpose of this section to induce you to
263 infringe any patents or other property right claims or to
264 contest validity of any such claims; this section has the
265 sole purpose of protecting the integrity of the free
266 software distribution system, which is implemented by
267 public license practices. Many people have made generous
268 contributions to the wide range of software distributed
269 through that system in reliance on consistent application
270 of that system; it is up to the author/donor to decide if
271 he or she is willing to distribute software through any
272 other system and a licensee cannot impose that choice.
273
274 This section is intended to make thoroughly clear what is
275 believed to be a consequence of the rest of this License.
276
277 8. If the distribution and/or use of the Program is
278 restricted in certain countries either by patents or by
279 copyrighted interfaces, the original copyright holder who
280 places the Program under this License may add an explicit
281 geographical distribution limitation excluding those
282 countries, so that distribution is permitted only in or
283 among countries not thus excluded. In such case, this
284 License incorporates the limitation as if written in the
285 body of this License.
286
287 9. The Free Software Foundation may
288 publish revised and/or new versions of the General Public
289 License from time to time. Such new versions will be
290 similar in spirit to the present version, but may differ in
291 detail to address new problems or concerns.
292
293 Each version is given a distinguishing version number. If
294 the Program specifies a version number of this License
295 which applies to it and "any later version", you have the
296 option of following the terms and conditions either of that
297 version or of any later version published by the Free
298 Software Foundation. If the Program does not specify a
299 version number of this License, you may choose any version
300 ever published by the Free Software Foundation.
301
302 10. If you wish to incorporate parts of the Program into
303 other free programs whose distribution conditions are
304 different, write to the author to ask for permission. For
305 software which is copyrighted by the Free Software
306 Foundation, write to the Free Software Foundation; we
307 sometimes make exceptions for this. Our decision will be
308 guided by the two goals of preserving the free status of
309 all derivatives of our free software and of promoting the
310 sharing and reuse of software generally.
311
312 NO WARRANTY
313
314 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE
315 IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
316 APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING
317 THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE
318 PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER
319 EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE
320 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
321 PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND
322 PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM
323 PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY
324 SERVICING, REPAIR OR CORRECTION.
325
326 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR
327 AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY
328 OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE PROGRAM
329 AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING
330 ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES
331 ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM
332 (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING
333 RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
334 PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY
335 OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS
336 BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
337
338 END OF TERMS AND CONDITIONS
339
340
341
342
343 How to Apply These Terms to Your New Programs
344
345 If you develop a new program, and you want it to be of
346 the greatest possible use to the public, the best way to
347 achieve this is to make it free software which everyone can
348 redistribute and change under these terms.
349
350 To do so, attach the following notices to the program.
351 It is safest to attach them to the start of each source
352 file to most effectively convey the exclusion of warranty;
353 and each file should have at least the "copyright" line and
354 a pointer to where the full notice is found.
355
356 /*
357 <one line to give the program's name and a brief idea of what it does.>
358 Copyright (C) 19yy <name of author>
359
360 This program is free software; you can redistribute it and/or modify
361 it under the terms of the GNU General Public License as published by
362 the Free Software Foundation; either version 2 of the License, or
363 (at your option) any later version.
364
365 This program is distributed in the hope that it will be useful,
366 but WITHOUT ANY WARRANTY; without even the implied warranty of
367 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
368 GNU General Public License for more details.
369
370 You should have received a copy of the GNU General Public License
371 along with this program; if not, write to the Free Software
372 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
373 */
374
375 Also add information on how to contact you by electronic
376 and paper mail.
377
378 If the program is interactive, make it output a short
379 notice like this when it starts in an interactive mode:
380
381
382 Gnomovision version 69, Copyright (C) 19yy name of author
383 Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
384 This is free software, and you are welcome to redistribute it
385 under certain conditions; type `show c' for details.
386
387 The hypothetical commands `show w' and `show c' should show
388 the appropriate parts of the General Public License. Of
389 course, the commands you use may be called something other
390 than `show w' and `show c'; they could even be mouse-clicks
391 or menu items--whatever suits your program.
392
393 You should also get your employer (if you work as a
394 programmer) or your school, if any, to sign a "copyright
395 disclaimer" for the program, if necessary. Here is a
396 sample; alter the names:
397
398 Yoyodyne, Inc., hereby disclaims all copyright interest
399 in the program `Gnomovision' (which makes passes at
400 compilers) written by James Hacker.
401
402 <signature of Ty Coon>, 1 April 1989
403 Ty Coon, President of Vice
404
405 This General Public License does not permit incorporating
406 your program into proprietary programs. If your program is
407 a subroutine library, you may consider it more useful to
408 permit linking proprietary applications with the library.
409 If this is what you want to do, use the GNU Library General
410 Public License instead of this License.

john.pye@anu.edu.au
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