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\documentclass[11pt]{article}
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\title{GNU GENERAL PUBLIC LICENSE}
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\date{Version 3, 29 June 2007}
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\begin{document}
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\maketitle
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\begin{center}
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{\parindent 0in
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Copyright \copyright\  2007 Free Software Foundation, Inc. \texttt{http://fsf.org/}
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\bigskip
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Everyone is permitted to copy and distribute verbatim copies of this
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license document, but changing it is not allowed.}
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\end{center}
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\renewcommand{\abstractname}{Preamble}
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\begin{abstract}
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The GNU General Public License is a free, copyleft license for
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software and other kinds of works.
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The licenses for most software and other practical works are designed
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to take away your freedom to share and change the works.  By contrast,
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the GNU General Public License is intended to guarantee your freedom to
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share and change all versions of a program--to make sure it remains free
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software for all its users.  We, the Free Software Foundation, use the
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GNU General Public License for most of our software; it applies also to
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any other work released this way by its authors.  You can apply it to
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your programs, too.
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When we speak of free software, we are referring to freedom, not
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price.  Our General Public Licenses are designed to make sure that you
37
have the freedom to distribute copies of free software (and charge for
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them if you wish), that you receive source code or can get it if you
39
want it, that you can change the software or use pieces of it in new
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free programs, and that you know you can do these things.
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42
To protect your rights, we need to prevent others from denying you
43
these rights or asking you to surrender the rights.  Therefore, you have
44
certain responsibilities if you distribute copies of the software, or if
45
you modify it: responsibilities to respect the freedom of others.
46
 
47
For example, if you distribute copies of such a program, whether
48
gratis or for a fee, you must pass on to the recipients the same
49
freedoms that you received.  You must make sure that they, too, receive
50
or can get the source code.  And you must show them these terms so they
51
know their rights.
52
 
53
Developers that use the GNU GPL protect your rights with two steps:
54
(1) assert copyright on the software, and (2) offer you this License
55
giving you legal permission to copy, distribute and/or modify it.
56
 
57
For the developers' and authors' protection, the GPL clearly explains
58
that there is no warranty for this free software.  For both users' and
59
authors' sake, the GPL requires that modified versions be marked as
60
changed, so that their problems will not be attributed erroneously to
61
authors of previous versions.
62
 
63
Some devices are designed to deny users access to install or run
64
modified versions of the software inside them, although the manufacturer
65
can do so.  This is fundamentally incompatible with the aim of
66
protecting users' freedom to change the software.  The systematic
67
pattern of such abuse occurs in the area of products for individuals to
68
use, which is precisely where it is most unacceptable.  Therefore, we
69
have designed this version of the GPL to prohibit the practice for those
70
products.  If such problems arise substantially in other domains, we
71
stand ready to extend this provision to those domains in future versions
72
of the GPL, as needed to protect the freedom of users.
73
 
74
Finally, every program is threatened constantly by software patents.
75
States should not allow patents to restrict development and use of
76
software on general-purpose computers, but in those that do, we wish to
77
avoid the special danger that patents applied to a free program could
78
make it effectively proprietary.  To prevent this, the GPL assures that
79
patents cannot be used to render the program non-free.
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81
The precise terms and conditions for copying, distribution and
82
modification follow.
83
\end{abstract}
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\begin{center}
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{\Large \sc Terms and Conditions}
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\end{center}
88
 
89
 
90
\begin{enumerate}
91
 
92
\addtocounter{enumi}{-1}
93
 
94
\item Definitions.
95
 
96
``This License'' refers to version 3 of the GNU General Public License.
97
 
98
``Copyright'' also means copyright-like laws that apply to other kinds of
99
works, such as semiconductor masks.
100
 
101
``The Program'' refers to any copyrightable work licensed under this
102
License.  Each licensee is addressed as ``you''.  ``Licensees'' and
103
``recipients'' may be individuals or organizations.
104
 
105
To ``modify'' a work means to copy from or adapt all or part of the work
106
in a fashion requiring copyright permission, other than the making of an
107
exact copy.  The resulting work is called a ``modified version'' of the
108
earlier work or a work ``based on'' the earlier work.
109
 
110
A ``covered work'' means either the unmodified Program or a work based
111
on the Program.
112
 
113
To ``propagate'' a work means to do anything with it that, without
114
permission, would make you directly or secondarily liable for
115
infringement under applicable copyright law, except executing it on a
116
computer or modifying a private copy.  Propagation includes copying,
117
distribution (with or without modification), making available to the
118
public, and in some countries other activities as well.
119
 
120
To ``convey'' a work means any kind of propagation that enables other
121
parties to make or receive copies.  Mere interaction with a user through
122
a computer network, with no transfer of a copy, is not conveying.
123
 
124
An interactive user interface displays ``Appropriate Legal Notices''
125
to the extent that it includes a convenient and prominently visible
126
feature that (1) displays an appropriate copyright notice, and (2)
127
tells the user that there is no warranty for the work (except to the
128
extent that warranties are provided), that licensees may convey the
129
work under this License, and how to view a copy of this License.  If
130
the interface presents a list of user commands or options, such as a
131
menu, a prominent item in the list meets this criterion.
132
 
133
\item Source Code.
134
 
135
The ``source code'' for a work means the preferred form of the work
136
for making modifications to it.  ``Object code'' means any non-source
137
form of a work.
138
 
139
A ``Standard Interface'' means an interface that either is an official
140
standard defined by a recognized standards body, or, in the case of
141
interfaces specified for a particular programming language, one that
142
is widely used among developers working in that language.
143
 
144
The ``System Libraries'' of an executable work include anything, other
145
than the work as a whole, that (a) is included in the normal form of
146
packaging a Major Component, but which is not part of that Major
147
Component, and (b) serves only to enable use of the work with that
148
Major Component, or to implement a Standard Interface for which an
149
implementation is available to the public in source code form.  A
150
``Major Component'', in this context, means a major essential component
151
(kernel, window system, and so on) of the specific operating system
152
(if any) on which the executable work runs, or a compiler used to
153
produce the work, or an object code interpreter used to run it.
154
 
155
The ``Corresponding Source'' for a work in object code form means all
156
the source code needed to generate, install, and (for an executable
157
work) run the object code and to modify the work, including scripts to
158
control those activities.  However, it does not include the work's
159
System Libraries, or general-purpose tools or generally available free
160
programs which are used unmodified in performing those activities but
161
which are not part of the work.  For example, Corresponding Source
162
includes interface definition files associated with source files for
163
the work, and the source code for shared libraries and dynamically
164
linked subprograms that the work is specifically designed to require,
165
such as by intimate data communication or control flow between those
166
subprograms and other parts of the work.
167
 
168
The Corresponding Source need not include anything that users
169
can regenerate automatically from other parts of the Corresponding
170
Source.
171
 
172
The Corresponding Source for a work in source code form is that
173
same work.
174
 
175
\item Basic Permissions.
176
 
177
All rights granted under this License are granted for the term of
178
copyright on the Program, and are irrevocable provided the stated
179
conditions are met.  This License explicitly affirms your unlimited
180
permission to run the unmodified Program.  The output from running a
181
covered work is covered by this License only if the output, given its
182
content, constitutes a covered work.  This License acknowledges your
183
rights of fair use or other equivalent, as provided by copyright law.
184
 
185
You may make, run and propagate covered works that you do not
186
convey, without conditions so long as your license otherwise remains
187
in force.  You may convey covered works to others for the sole purpose
188
of having them make modifications exclusively for you, or provide you
189
with facilities for running those works, provided that you comply with
190
the terms of this License in conveying all material for which you do
191
not control copyright.  Those thus making or running the covered works
192
for you must do so exclusively on your behalf, under your direction
193
and control, on terms that prohibit them from making any copies of
194
your copyrighted material outside their relationship with you.
195
 
196
Conveying under any other circumstances is permitted solely under
197
the conditions stated below.  Sublicensing is not allowed; section 10
198
makes it unnecessary.
199
 
200
\item Protecting Users' Legal Rights From Anti-Circumvention Law.
201
 
202
No covered work shall be deemed part of an effective technological
203
measure under any applicable law fulfilling obligations under article
204
11 of the WIPO copyright treaty adopted on 20 December 1996, or
205
similar laws prohibiting or restricting circumvention of such
206
measures.
207
 
208
When you convey a covered work, you waive any legal power to forbid
209
circumvention of technological measures to the extent such circumvention
210
is effected by exercising rights under this License with respect to
211
the covered work, and you disclaim any intention to limit operation or
212
modification of the work as a means of enforcing, against the work's
213
users, your or third parties' legal rights to forbid circumvention of
214
technological measures.
215
 
216
\item Conveying Verbatim Copies.
217
 
218
You may convey verbatim copies of the Program's source code as you
219
receive it, in any medium, provided that you conspicuously and
220
appropriately publish on each copy an appropriate copyright notice;
221
keep intact all notices stating that this License and any
222
non-permissive terms added in accord with section 7 apply to the code;
223
keep intact all notices of the absence of any warranty; and give all
224
recipients a copy of this License along with the Program.
225
 
226
You may charge any price or no price for each copy that you convey,
227
and you may offer support or warranty protection for a fee.
228
 
229
\item Conveying Modified Source Versions.
230
 
231
You may convey a work based on the Program, or the modifications to
232
produce it from the Program, in the form of source code under the
233
terms of section 4, provided that you also meet all of these conditions:
234
  \begin{enumerate}
235
  \item The work must carry prominent notices stating that you modified
236
  it, and giving a relevant date.
237
 
238
  \item The work must carry prominent notices stating that it is
239
  released under this License and any conditions added under section
240
  7.  This requirement modifies the requirement in section 4 to
241
  ``keep intact all notices''.
242
 
243
  \item You must license the entire work, as a whole, under this
244
  License to anyone who comes into possession of a copy.  This
245
  License will therefore apply, along with any applicable section 7
246
  additional terms, to the whole of the work, and all its parts,
247
  regardless of how they are packaged.  This License gives no
248
  permission to license the work in any other way, but it does not
249
  invalidate such permission if you have separately received it.
250
 
251
  \item If the work has interactive user interfaces, each must display
252
  Appropriate Legal Notices; however, if the Program has interactive
253
  interfaces that do not display Appropriate Legal Notices, your
254
  work need not make them do so.
255
\end{enumerate}
256
A compilation of a covered work with other separate and independent
257
works, which are not by their nature extensions of the covered work,
258
and which are not combined with it such as to form a larger program,
259
in or on a volume of a storage or distribution medium, is called an
260
``aggregate'' if the compilation and its resulting copyright are not
261
used to limit the access or legal rights of the compilation's users
262
beyond what the individual works permit.  Inclusion of a covered work
263
in an aggregate does not cause this License to apply to the other
264
parts of the aggregate.
265
 
266
\item Conveying Non-Source Forms.
267
 
268
You may convey a covered work in object code form under the terms
269
of sections 4 and 5, provided that you also convey the
270
machine-readable Corresponding Source under the terms of this License,
271
in one of these ways:
272
  \begin{enumerate}
273
  \item Convey the object code in, or embodied in, a physical product
274
  (including a physical distribution medium), accompanied by the
275
  Corresponding Source fixed on a durable physical medium
276
  customarily used for software interchange.
277
 
278
  \item Convey the object code in, or embodied in, a physical product
279
  (including a physical distribution medium), accompanied by a
280
  written offer, valid for at least three years and valid for as
281
  long as you offer spare parts or customer support for that product
282
  model, to give anyone who possesses the object code either (1) a
283
  copy of the Corresponding Source for all the software in the
284
  product that is covered by this License, on a durable physical
285
  medium customarily used for software interchange, for a price no
286
  more than your reasonable cost of physically performing this
287
  conveying of source, or (2) access to copy the
288
  Corresponding Source from a network server at no charge.
289
 
290
  \item Convey individual copies of the object code with a copy of the
291
  written offer to provide the Corresponding Source.  This
292
  alternative is allowed only occasionally and noncommercially, and
293
  only if you received the object code with such an offer, in accord
294
  with subsection 6b.
295
 
296
  \item Convey the object code by offering access from a designated
297
  place (gratis or for a charge), and offer equivalent access to the
298
  Corresponding Source in the same way through the same place at no
299
  further charge.  You need not require recipients to copy the
300
  Corresponding Source along with the object code.  If the place to
301
  copy the object code is a network server, the Corresponding Source
302
  may be on a different server (operated by you or a third party)
303
  that supports equivalent copying facilities, provided you maintain
304
  clear directions next to the object code saying where to find the
305
  Corresponding Source.  Regardless of what server hosts the
306
  Corresponding Source, you remain obligated to ensure that it is
307
  available for as long as needed to satisfy these requirements.
308
 
309
  \item Convey the object code using peer-to-peer transmission, provided
310
  you inform other peers where the object code and Corresponding
311
  Source of the work are being offered to the general public at no
312
  charge under subsection 6d.
313
  \end{enumerate}
314
 
315
A separable portion of the object code, whose source code is excluded
316
from the Corresponding Source as a System Library, need not be
317
included in conveying the object code work.
318
 
319
A ``User Product'' is either (1) a ``consumer product'', which means any
320
tangible personal property which is normally used for personal, family,
321
or household purposes, or (2) anything designed or sold for incorporation
322
into a dwelling.  In determining whether a product is a consumer product,
323
doubtful cases shall be resolved in favor of coverage.  For a particular
324
product received by a particular user, ``normally used'' refers to a
325
typical or common use of that class of product, regardless of the status
326
of the particular user or of the way in which the particular user
327
actually uses, or expects or is expected to use, the product.  A product
328
is a consumer product regardless of whether the product has substantial
329
commercial, industrial or non-consumer uses, unless such uses represent
330
the only significant mode of use of the product.
331
 
332
``Installation Information'' for a User Product means any methods,
333
procedures, authorization keys, or other information required to install
334
and execute modified versions of a covered work in that User Product from
335
a modified version of its Corresponding Source.  The information must
336
suffice to ensure that the continued functioning of the modified object
337
code is in no case prevented or interfered with solely because
338
modification has been made.
339
 
340
If you convey an object code work under this section in, or with, or
341
specifically for use in, a User Product, and the conveying occurs as
342
part of a transaction in which the right of possession and use of the
343
User Product is transferred to the recipient in perpetuity or for a
344
fixed term (regardless of how the transaction is characterized), the
345
Corresponding Source conveyed under this section must be accompanied
346
by the Installation Information.  But this requirement does not apply
347
if neither you nor any third party retains the ability to install
348
modified object code on the User Product (for example, the work has
349
been installed in ROM).
350
 
351
The requirement to provide Installation Information does not include a
352
requirement to continue to provide support service, warranty, or updates
353
for a work that has been modified or installed by the recipient, or for
354
the User Product in which it has been modified or installed.  Access to a
355
network may be denied when the modification itself materially and
356
adversely affects the operation of the network or violates the rules and
357
protocols for communication across the network.
358
 
359
Corresponding Source conveyed, and Installation Information provided,
360
in accord with this section must be in a format that is publicly
361
documented (and with an implementation available to the public in
362
source code form), and must require no special password or key for
363
unpacking, reading or copying.
364
 
365
\item Additional Terms.
366
 
367
``Additional permissions'' are terms that supplement the terms of this
368
License by making exceptions from one or more of its conditions.
369
Additional permissions that are applicable to the entire Program shall
370
be treated as though they were included in this License, to the extent
371
that they are valid under applicable law.  If additional permissions
372
apply only to part of the Program, that part may be used separately
373
under those permissions, but the entire Program remains governed by
374
this License without regard to the additional permissions.
375
 
376
When you convey a copy of a covered work, you may at your option
377
remove any additional permissions from that copy, or from any part of
378
it.  (Additional permissions may be written to require their own
379
removal in certain cases when you modify the work.)  You may place
380
additional permissions on material, added by you to a covered work,
381
for which you have or can give appropriate copyright permission.
382
 
383
Notwithstanding any other provision of this License, for material you
384
add to a covered work, you may (if authorized by the copyright holders of
385
that material) supplement the terms of this License with terms:
386
  \begin{enumerate}
387
  \item Disclaiming warranty or limiting liability differently from the
388
  terms of sections 15 and 16 of this License; or
389
 
390
  \item Requiring preservation of specified reasonable legal notices or
391
  author attributions in that material or in the Appropriate Legal
392
  Notices displayed by works containing it; or
393
 
394
  \item Prohibiting misrepresentation of the origin of that material, or
395
  requiring that modified versions of such material be marked in
396
  reasonable ways as different from the original version; or
397
 
398
  \item Limiting the use for publicity purposes of names of licensors or
399
  authors of the material; or
400
 
401
  \item Declining to grant rights under trademark law for use of some
402
  trade names, trademarks, or service marks; or
403
 
404
  \item Requiring indemnification of licensors and authors of that
405
  material by anyone who conveys the material (or modified versions of
406
  it) with contractual assumptions of liability to the recipient, for
407
  any liability that these contractual assumptions directly impose on
408
  those licensors and authors.
409
  \end{enumerate}
410
 
411
All other non-permissive additional terms are considered ``further
412
restrictions'' within the meaning of section 10.  If the Program as you
413
received it, or any part of it, contains a notice stating that it is
414
governed by this License along with a term that is a further
415
restriction, you may remove that term.  If a license document contains
416
a further restriction but permits relicensing or conveying under this
417
License, you may add to a covered work material governed by the terms
418
of that license document, provided that the further restriction does
419
not survive such relicensing or conveying.
420
 
421
If you add terms to a covered work in accord with this section, you
422
must place, in the relevant source files, a statement of the
423
additional terms that apply to those files, or a notice indicating
424
where to find the applicable terms.
425
 
426
Additional terms, permissive or non-permissive, may be stated in the
427
form of a separately written license, or stated as exceptions;
428
the above requirements apply either way.
429
 
430
\item Termination.
431
 
432
You may not propagate or modify a covered work except as expressly
433
provided under this License.  Any attempt otherwise to propagate or
434
modify it is void, and will automatically terminate your rights under
435
this License (including any patent licenses granted under the third
436
paragraph of section 11).
437
 
438
However, if you cease all violation of this License, then your
439
license from a particular copyright holder is reinstated (a)
440
provisionally, unless and until the copyright holder explicitly and
441
finally terminates your license, and (b) permanently, if the copyright
442
holder fails to notify you of the violation by some reasonable means
443
prior to 60 days after the cessation.
444
 
445
Moreover, your license from a particular copyright holder is
446
reinstated permanently if the copyright holder notifies you of the
447
violation by some reasonable means, this is the first time you have
448
received notice of violation of this License (for any work) from that
449
copyright holder, and you cure the violation prior to 30 days after
450
your receipt of the notice.
451
 
452
Termination of your rights under this section does not terminate the
453
licenses of parties who have received copies or rights from you under
454
this License.  If your rights have been terminated and not permanently
455
reinstated, you do not qualify to receive new licenses for the same
456
material under section 10.
457
 
458
\item Acceptance Not Required for Having Copies.
459
 
460
You are not required to accept this License in order to receive or
461
run a copy of the Program.  Ancillary propagation of a covered work
462
occurring solely as a consequence of using peer-to-peer transmission
463
to receive a copy likewise does not require acceptance.  However,
464
nothing other than this License grants you permission to propagate or
465
modify any covered work.  These actions infringe copyright if you do
466
not accept this License.  Therefore, by modifying or propagating a
467
covered work, you indicate your acceptance of this License to do so.
468
 
469
\item Automatic Licensing of Downstream Recipients.
470
 
471
Each time you convey a covered work, the recipient automatically
472
receives a license from the original licensors, to run, modify and
473
propagate that work, subject to this License.  You are not responsible
474
for enforcing compliance by third parties with this License.
475
 
476
An ``entity transaction'' is a transaction transferring control of an
477
organization, or substantially all assets of one, or subdividing an
478
organization, or merging organizations.  If propagation of a covered
479
work results from an entity transaction, each party to that
480
transaction who receives a copy of the work also receives whatever
481
licenses to the work the party's predecessor in interest had or could
482
give under the previous paragraph, plus a right to possession of the
483
Corresponding Source of the work from the predecessor in interest, if
484
the predecessor has it or can get it with reasonable efforts.
485
 
486
You may not impose any further restrictions on the exercise of the
487
rights granted or affirmed under this License.  For example, you may
488
not impose a license fee, royalty, or other charge for exercise of
489
rights granted under this License, and you may not initiate litigation
490
(including a cross-claim or counterclaim in a lawsuit) alleging that
491
any patent claim is infringed by making, using, selling, offering for
492
sale, or importing the Program or any portion of it.
493
 
494
\item Patents.
495
 
496
A ``contributor'' is a copyright holder who authorizes use under this
497
License of the Program or a work on which the Program is based.  The
498
work thus licensed is called the contributor's ``contributor version''.
499
 
500
A contributor's ``essential patent claims'' are all patent claims
501
owned or controlled by the contributor, whether already acquired or
502
hereafter acquired, that would be infringed by some manner, permitted
503
by this License, of making, using, or selling its contributor version,
504
but do not include claims that would be infringed only as a
505
consequence of further modification of the contributor version.  For
506
purposes of this definition, ``control'' includes the right to grant
507
patent sublicenses in a manner consistent with the requirements of
508
this License.
509
 
510
Each contributor grants you a non-exclusive, worldwide, royalty-free
511
patent license under the contributor's essential patent claims, to
512
make, use, sell, offer for sale, import and otherwise run, modify and
513
propagate the contents of its contributor version.
514
 
515
In the following three paragraphs, a ``patent license'' is any express
516
agreement or commitment, however denominated, not to enforce a patent
517
(such as an express permission to practice a patent or covenant not to
518
sue for patent infringement).  To ``grant'' such a patent license to a
519
party means to make such an agreement or commitment not to enforce a
520
patent against the party.
521
 
522
If you convey a covered work, knowingly relying on a patent license,
523
and the Corresponding Source of the work is not available for anyone
524
to copy, free of charge and under the terms of this License, through a
525
publicly available network server or other readily accessible means,
526
then you must either (1) cause the Corresponding Source to be so
527
available, or (2) arrange to deprive yourself of the benefit of the
528
patent license for this particular work, or (3) arrange, in a manner
529
consistent with the requirements of this License, to extend the patent
530
license to downstream recipients.  ``Knowingly relying'' means you have
531
actual knowledge that, but for the patent license, your conveying the
532
covered work in a country, or your recipient's use of the covered work
533
in a country, would infringe one or more identifiable patents in that
534
country that you have reason to believe are valid.
535
 
536
If, pursuant to or in connection with a single transaction or
537
arrangement, you convey, or propagate by procuring conveyance of, a
538
covered work, and grant a patent license to some of the parties
539
receiving the covered work authorizing them to use, propagate, modify
540
or convey a specific copy of the covered work, then the patent license
541
you grant is automatically extended to all recipients of the covered
542
work and works based on it.
543
 
544
A patent license is ``discriminatory'' if it does not include within
545
the scope of its coverage, prohibits the exercise of, or is
546
conditioned on the non-exercise of one or more of the rights that are
547
specifically granted under this License.  You may not convey a covered
548
work if you are a party to an arrangement with a third party that is
549
in the business of distributing software, under which you make payment
550
to the third party based on the extent of your activity of conveying
551
the work, and under which the third party grants, to any of the
552
parties who would receive the covered work from you, a discriminatory
553
patent license (a) in connection with copies of the covered work
554
conveyed by you (or copies made from those copies), or (b) primarily
555
for and in connection with specific products or compilations that
556
contain the covered work, unless you entered into that arrangement,
557
or that patent license was granted, prior to 28 March 2007.
558
 
559
Nothing in this License shall be construed as excluding or limiting
560
any implied license or other defenses to infringement that may
561
otherwise be available to you under applicable patent law.
562
 
563
\item No Surrender of Others' Freedom.
564
 
565
If conditions are imposed on you (whether by court order, agreement or
566
otherwise) that contradict the conditions of this License, they do not
567
excuse you from the conditions of this License.  If you cannot convey a
568
covered work so as to satisfy simultaneously your obligations under this
569
License and any other pertinent obligations, then as a consequence you may
570
not convey it at all.  For example, if you agree to terms that obligate you
571
to collect a royalty for further conveying from those to whom you convey
572
the Program, the only way you could satisfy both those terms and this
573
License would be to refrain entirely from conveying the Program.
574
 
575
\item Use with the GNU Affero General Public License.
576
 
577
Notwithstanding any other provision of this License, you have
578
permission to link or combine any covered work with a work licensed
579
under version 3 of the GNU Affero General Public License into a single
580
combined work, and to convey the resulting work.  The terms of this
581
License will continue to apply to the part which is the covered work,
582
but the special requirements of the GNU Affero General Public License,
583
section 13, concerning interaction through a network will apply to the
584
combination as such.
585
 
586
\item Revised Versions of this License.
587
 
588
The Free Software Foundation may publish revised and/or new versions of
589
the GNU General Public License from time to time.  Such new versions will
590
be similar in spirit to the present version, but may differ in detail to
591
address new problems or concerns.
592
 
593
Each version is given a distinguishing version number.  If the
594
Program specifies that a certain numbered version of the GNU General
595
Public License ``or any later version'' applies to it, you have the
596
option of following the terms and conditions either of that numbered
597
version or of any later version published by the Free Software
598
Foundation.  If the Program does not specify a version number of the
599
GNU General Public License, you may choose any version ever published
600
by the Free Software Foundation.
601
 
602
If the Program specifies that a proxy can decide which future
603
versions of the GNU General Public License can be used, that proxy's
604
public statement of acceptance of a version permanently authorizes you
605
to choose that version for the Program.
606
 
607
Later license versions may give you additional or different
608
permissions.  However, no additional obligations are imposed on any
609
author or copyright holder as a result of your choosing to follow a
610
later version.
611
 
612
\item Disclaimer of Warranty.
613
 
614
\begin{sloppypar}
615
 THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
616
 APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE
617
 COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM ``AS IS''
618
 WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED,
619
 INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
620
 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE
621
 RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.
622
 SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL
623
 NECESSARY SERVICING, REPAIR OR CORRECTION.
624
\end{sloppypar}
625
 
626
\item Limitation of Liability.
627
 
628
 IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN
629
 WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES
630
 AND/OR CONVEYS THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR
631
 DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL
632
 DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM
633
 (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED
634
 INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE
635
 OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH
636
 HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
637
 DAMAGES.
638
 
639
\item Interpretation of Sections 15 and 16.
640
 
641
If the disclaimer of warranty and limitation of liability provided
642
above cannot be given local legal effect according to their terms,
643
reviewing courts shall apply local law that most closely approximates
644
an absolute waiver of all civil liability in connection with the
645
Program, unless a warranty or assumption of liability accompanies a
646
copy of the Program in return for a fee.
647
 
648
\begin{center}
649
{\Large\sc End of Terms and Conditions}
650
 
651
\bigskip
652
How to Apply These Terms to Your New Programs
653
\end{center}
654
 
655
If you develop a new program, and you want it to be of the greatest
656
possible use to the public, the best way to achieve this is to make it
657
free software which everyone can redistribute and change under these terms.
658
 
659
To do so, attach the following notices to the program.  It is safest
660
to attach them to the start of each source file to most effectively
661
state the exclusion of warranty; and each file should have at least
662
the ``copyright'' line and a pointer to where the full notice is found.
663
 
664
{\footnotesize
665
\begin{verbatim}
666
<one line to give the program's name and a brief idea of what it does.>
667
 
668
Copyright (C) <textyear>  <name of author>
669
 
670
This program is free software: you can redistribute it and/or modify
671
it under the terms of the GNU General Public License as published by
672
the Free Software Foundation, either version 3 of the License, or
673
(at your option) any later version.
674
 
675
This program is distributed in the hope that it will be useful,
676
but WITHOUT ANY WARRANTY; without even the implied warranty of
677
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
678
GNU General Public License for more details.
679
 
680
You should have received a copy of the GNU General Public License
681
along with this program.  If not, see <http://www.gnu.org/licenses/>.
682
\end{verbatim}
683
}
684
 
685
Also add information on how to contact you by electronic and paper mail.
686
 
687
If the program does terminal interaction, make it output a short
688
notice like this when it starts in an interactive mode:
689
 
690
{\footnotesize
691
\begin{verbatim}
692
<program>  Copyright (C) <year>  <name of author>
693
 
694
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
695
This is free software, and you are welcome to redistribute it
696
under certain conditions; type `show c' for details.
697
\end{verbatim}
698
}
699
 
700
The hypothetical commands {\tt show w} and {\tt show c} should show
701
the appropriate
702
parts of the General Public License.  Of course, your program's commands
703
might be different; for a GUI interface, you would use an ``about box''.
704
 
705
You should also get your employer (if you work as a programmer) or
706
school, if any, to sign a ``copyright disclaimer'' for the program, if
707
necessary.  For more information on this, and how to apply and follow
708
the GNU GPL, see \texttt{http://www.gnu.org/licenses/}.
709
 
710
The GNU General Public License does not permit incorporating your
711
program into proprietary programs.  If your program is a subroutine
712
library, you may consider it more useful to permit linking proprietary
713
applications with the library.  If this is what you want to do, use
714
the GNU Lesser General Public License instead of this License.  But
715
first, please read \texttt{http://www.gnu.org/philosophy/why-not-lgpl.html}.
716
 
717
\end{enumerate}
718
 
719
\end{document}

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