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    1 \begin{center}
    2 \textbf{\Large GNU GENERAL PUBLIC LICENSE}
    3 
    4 \textbf{\large Version 3, 29 June 2007}
    5 
    6 {\parindent 0in
    7 
    8 Copyright \copyright\  2007 Free Software Foundation, Inc. \texttt{http://fsf.org/}
    9 
   10 \bigskip
   11 Everyone is permitted to copy and distribute verbatim copies of this
   12 
   13 license document, but changing it is not allowed.}
   14 
   15 
   16 \textbf{\Large Preamble}
   17 \end{center}
   18 
   19 The GNU General Public License is a free, copyleft license for
   20 software and other kinds of works.
   21 
   22 The licenses for most software and other practical works are designed
   23 to take away your freedom to share and change the works.  By contrast,
   24 the GNU General Public License is intended to guarantee your freedom to
   25 share and change all versions of a program--to make sure it remains free
   26 software for all its users.  We, the Free Software Foundation, use the
   27 GNU General Public License for most of our software; it applies also to
   28 any other work released this way by its authors.  You can apply it to
   29 your programs, too.
   30 
   31 When we speak of free software, we are referring to freedom, not
   32 price.  Our General Public Licenses are designed to make sure that you
   33 have the freedom to distribute copies of free software (and charge for
   34 them if you wish), that you receive source code or can get it if you
   35 want it, that you can change the software or use pieces of it in new
   36 free programs, and that you know you can do these things.
   37 
   38 To protect your rights, we need to prevent others from denying you
   39 these rights or asking you to surrender the rights.  Therefore, you have
   40 certain responsibilities if you distribute copies of the software, or if
   41 you modify it: responsibilities to respect the freedom of others.
   42 
   43 For example, if you distribute copies of such a program, whether
   44 gratis or for a fee, you must pass on to the recipients the same
   45 freedoms that you received.  You must make sure that they, too, receive
   46 or can get the source code.  And you must show them these terms so they
   47 know their rights.
   48 
   49 Developers that use the GNU GPL protect your rights with two steps:
   50 (1) assert copyright on the software, and (2) offer you this License
   51 giving you legal permission to copy, distribute and/or modify it.
   52 
   53 For the developers' and authors' protection, the GPL clearly explains
   54 that there is no warranty for this free software.  For both users' and
   55 authors' sake, the GPL requires that modified versions be marked as
   56 changed, so that their problems will not be attributed erroneously to
   57 authors of previous versions.
   58 
   59 Some devices are designed to deny users access to install or run
   60 modified versions of the software inside them, although the manufacturer
   61 can do so.  This is fundamentally incompatible with the aim of
   62 protecting users' freedom to change the software.  The systematic
   63 pattern of such abuse occurs in the area of products for individuals to
   64 use, which is precisely where it is most unacceptable.  Therefore, we
   65 have designed this version of the GPL to prohibit the practice for those
   66 products.  If such problems arise substantially in other domains, we
   67 stand ready to extend this provision to those domains in future versions
   68 of the GPL, as needed to protect the freedom of users.
   69 
   70 Finally, every program is threatened constantly by software patents.
   71 States should not allow patents to restrict development and use of
   72 software on general-purpose computers, but in those that do, we wish to
   73 avoid the special danger that patents applied to a free program could
   74 make it effectively proprietary.  To prevent this, the GPL assures that
   75 patents cannot be used to render the program non-free.
   76 
   77 The precise terms and conditions for copying, distribution and
   78 modification follow.
   79 
   80 \begin{center}
   81 {\Large \sc Terms and Conditions}
   82 \end{center}
   83 
   84 
   85 \begin{enumerate}
   86 
   87 \addtocounter{enumi}{-1}
   88 
   89 \item Definitions.
   90 
   91 ``This License'' refers to version 3 of the GNU General Public License.
   92 
   93 ``Copyright'' also means copyright-like laws that apply to other kinds of
   94 works, such as semiconductor masks.
   95 
   96 ``The Program'' refers to any copyrightable work licensed under this
   97 License.  Each licensee is addressed as ``you''.  ``Licensees'' and
   98 ``recipients'' may be individuals or organizations.
   99 
  100 To ``modify'' a work means to copy from or adapt all or part of the work
  101 in a fashion requiring copyright permission, other than the making of an
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  103 earlier work or a work ``based on'' the earlier work.
  104 
  105 A ``covered work'' means either the unmodified Program or a work based
  106 on the Program.
  107 
  108 To ``propagate'' a work means to do anything with it that, without
  109 permission, would make you directly or secondarily liable for
  110 infringement under applicable copyright law, except executing it on a
  111 computer or modifying a private copy.  Propagation includes copying,
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  115 To ``convey'' a work means any kind of propagation that enables other
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  118 
  119 An interactive user interface displays ``Appropriate Legal Notices''
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  128 \item Source Code.
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  167 The Corresponding Source for a work in source code form is that
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  169 
  170 \item Basic Permissions.
  171 
  172 All rights granted under this License are granted for the term of
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  180 You may make, run and propagate covered works that you do not
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  195 \item Protecting Users' Legal Rights From Anti-Circumvention Law.
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  197 No covered work shall be deemed part of an effective technological
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  202 
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  210 
  211 \item Conveying Verbatim Copies.
  212 
  213 You may convey verbatim copies of the Program's source code as you
  214 receive it, in any medium, provided that you conspicuously and
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  216 keep intact all notices stating that this License and any
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  218 keep intact all notices of the absence of any warranty; and give all
  219 recipients a copy of this License along with the Program.
  220 
  221 You may charge any price or no price for each copy that you convey,
  222 and you may offer support or warranty protection for a fee.
  223 
  224 \item Conveying Modified Source Versions.
  225 
  226 You may convey a work based on the Program, or the modifications to
  227 produce it from the Program, in the form of source code under the
  228 terms of section 4, provided that you also meet all of these conditions:
  229   \begin{enumerate}
  230   \item The work must carry prominent notices stating that you modified
  231   it, and giving a relevant date.
  232 
  233   \item The work must carry prominent notices stating that it is
  234   released under this License and any conditions added under section
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  238   \item You must license the entire work, as a whole, under this
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  246   \item If the work has interactive user interfaces, each must display
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  250 \end{enumerate}
  251 A compilation of a covered work with other separate and independent
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  256 used to limit the access or legal rights of the compilation's users
  257 beyond what the individual works permit.  Inclusion of a covered work
  258 in an aggregate does not cause this License to apply to the other
  259 parts of the aggregate.
  260 
  261 \item Conveying Non-Source Forms.
  262 
  263 You may convey a covered work in object code form under the terms
  264 of sections 4 and 5, provided that you also convey the
  265 machine-readable Corresponding Source under the terms of this License,
  266 in one of these ways:
  267   \begin{enumerate}
  268   \item Convey the object code in, or embodied in, a physical product
  269   (including a physical distribution medium), accompanied by the
  270   Corresponding Source fixed on a durable physical medium
  271   customarily used for software interchange.
  272 
  273   \item Convey the object code in, or embodied in, a physical product
  274   (including a physical distribution medium), accompanied by a
  275   written offer, valid for at least three years and valid for as
  276   long as you offer spare parts or customer support for that product
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  278   copy of the Corresponding Source for all the software in the
  279   product that is covered by this License, on a durable physical
  280   medium customarily used for software interchange, for a price no
  281   more than your reasonable cost of physically performing this
  282   conveying of source, or (2) access to copy the
  283   Corresponding Source from a network server at no charge.
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  285   \item Convey individual copies of the object code with a copy of the
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  289   with subsection 6b.
  290 
  291   \item Convey the object code by offering access from a designated
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  303 
  304   \item Convey the object code using peer-to-peer transmission, provided
  305   you inform other peers where the object code and Corresponding
  306   Source of the work are being offered to the general public at no
  307   charge under subsection 6d.
  308   \end{enumerate}
  309 
  310 A separable portion of the object code, whose source code is excluded
  311 from the Corresponding Source as a System Library, need not be
  312 included in conveying the object code work.
  313 
  314 A ``User Product'' is either (1) a ``consumer product'', which means any
  315 tangible personal property which is normally used for personal, family,
  316 or household purposes, or (2) anything designed or sold for incorporation
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  320 typical or common use of that class of product, regardless of the status
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  327 ``Installation Information'' for a User Product means any methods,
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  335 If you convey an object code work under this section in, or with, or
  336 specifically for use in, a User Product, and the conveying occurs as
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  342 if neither you nor any third party retains the ability to install
  343 modified object code on the User Product (for example, the work has
  344 been installed in ROM).
  345 
  346 The requirement to provide Installation Information does not include a
  347 requirement to continue to provide support service, warranty, or updates
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  353 
  354 Corresponding Source conveyed, and Installation Information provided,
  355 in accord with this section must be in a format that is publicly
  356 documented (and with an implementation available to the public in
  357 source code form), and must require no special password or key for
  358 unpacking, reading or copying.
  359 
  360 \item Additional Terms.
  361 
  362 ``Additional permissions'' are terms that supplement the terms of this
  363 License by making exceptions from one or more of its conditions.
  364 Additional permissions that are applicable to the entire Program shall
  365 be treated as though they were included in this License, to the extent
  366 that they are valid under applicable law.  If additional permissions
  367 apply only to part of the Program, that part may be used separately
  368 under those permissions, but the entire Program remains governed by
  369 this License without regard to the additional permissions.
  370 
  371 When you convey a copy of a covered work, you may at your option
  372 remove any additional permissions from that copy, or from any part of
  373 it.  (Additional permissions may be written to require their own
  374 removal in certain cases when you modify the work.)  You may place
  375 additional permissions on material, added by you to a covered work,
  376 for which you have or can give appropriate copyright permission.
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  378 Notwithstanding any other provision of this License, for material you
  379 add to a covered work, you may (if authorized by the copyright holders of
  380 that material) supplement the terms of this License with terms:
  381   \begin{enumerate}
  382   \item Disclaiming warranty or limiting liability differently from the
  383   terms of sections 15 and 16 of this License; or
  384 
  385   \item Requiring preservation of specified reasonable legal notices or
  386   author attributions in that material or in the Appropriate Legal
  387   Notices displayed by works containing it; or
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  389   \item Prohibiting misrepresentation of the origin of that material, or
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  404   \end{enumerate}
  405 
  406 All other non-permissive additional terms are considered ``further
  407 restrictions'' within the meaning of section 10.  If the Program as you
  408 received it, or any part of it, contains a notice stating that it is
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  411 a further restriction but permits relicensing or conveying under this
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  416 If you add terms to a covered work in accord with this section, you
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  421 Additional terms, permissive or non-permissive, may be stated in the
  422 form of a separately written license, or stated as exceptions;
  423 the above requirements apply either way.
  424 
  425 \item Termination.
  426 
  427 You may not propagate or modify a covered work except as expressly
  428 provided under this License.  Any attempt otherwise to propagate or
  429 modify it is void, and will automatically terminate your rights under
  430 this License (including any patent licenses granted under the third
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  432 
  433 However, if you cease all violation of this License, then your
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  439 
  440 Moreover, your license from a particular copyright holder is
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  447 Termination of your rights under this section does not terminate the
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  452 
  453 \item Acceptance Not Required for Having Copies.
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  455 You are not required to accept this License in order to receive or
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  457 occurring solely as a consequence of using peer-to-peer transmission
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  464 \item Automatic Licensing of Downstream Recipients.
  465 
  466 Each time you convey a covered work, the recipient automatically
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  468 propagate that work, subject to this License.  You are not responsible
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  471 An ``entity transaction'' is a transaction transferring control of an
  472 organization, or substantially all assets of one, or subdividing an
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  480 
  481 You may not impose any further restrictions on the exercise of the
  482 rights granted or affirmed under this License.  For example, you may
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  486 any patent claim is infringed by making, using, selling, offering for
  487 sale, or importing the Program or any portion of it.
  488 
  489 \item Patents.
  490 
  491 A ``contributor'' is a copyright holder who authorizes use under this
  492 License of the Program or a work on which the Program is based.  The
  493 work thus licensed is called the contributor's ``contributor version''.
  494 
  495 A contributor's ``essential patent claims'' are all patent claims
  496 owned or controlled by the contributor, whether already acquired or
  497 hereafter acquired, that would be infringed by some manner, permitted
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  504 
  505 Each contributor grants you a non-exclusive, worldwide, royalty-free
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  508 propagate the contents of its contributor version.
  509 
  510 In the following three paragraphs, a ``patent license'' is any express
  511 agreement or commitment, however denominated, not to enforce a patent
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  516 
  517 If you convey a covered work, knowingly relying on a patent license,
  518 and the Corresponding Source of the work is not available for anyone
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  522 available, or (2) arrange to deprive yourself of the benefit of the
  523 patent license for this particular work, or (3) arrange, in a manner
  524 consistent with the requirements of this License, to extend the patent
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  526 actual knowledge that, but for the patent license, your conveying the
  527 covered work in a country, or your recipient's use of the covered work
  528 in a country, would infringe one or more identifiable patents in that
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  530 
  531 If, pursuant to or in connection with a single transaction or
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  538 
  539 A patent license is ``discriminatory'' if it does not include within
  540 the scope of its coverage, prohibits the exercise of, or is
  541 conditioned on the non-exercise of one or more of the rights that are
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  546 the work, and under which the third party grants, to any of the
  547 parties who would receive the covered work from you, a discriminatory
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  551 contain the covered work, unless you entered into that arrangement,
  552 or that patent license was granted, prior to 28 March 2007.
  553 
  554 Nothing in this License shall be construed as excluding or limiting
  555 any implied license or other defenses to infringement that may
  556 otherwise be available to you under applicable patent law.
  557 
  558 \item No Surrender of Others' Freedom.
  559 
  560 If conditions are imposed on you (whether by court order, agreement or
  561 otherwise) that contradict the conditions of this License, they do not
  562 excuse you from the conditions of this License.  If you cannot convey a
  563 covered work so as to satisfy simultaneously your obligations under this
  564 License and any other pertinent obligations, then as a consequence you may
  565 not convey it at all.  For example, if you agree to terms that obligate you
  566 to collect a royalty for further conveying from those to whom you convey
  567 the Program, the only way you could satisfy both those terms and this
  568 License would be to refrain entirely from conveying the Program.
  569 
  570 \item Use with the GNU Affero General Public License.
  571 
  572 Notwithstanding any other provision of this License, you have
  573 permission to link or combine any covered work with a work licensed
  574 under version 3 of the GNU Affero General Public License into a single
  575 combined work, and to convey the resulting work.  The terms of this
  576 License will continue to apply to the part which is the covered work,
  577 but the special requirements of the GNU Affero General Public License,
  578 section 13, concerning interaction through a network will apply to the
  579 combination as such.
  580 
  581 \item Revised Versions of this License.
  582 
  583 The Free Software Foundation may publish revised and/or new versions of
  584 the GNU General Public License from time to time.  Such new versions will
  585 be similar in spirit to the present version, but may differ in detail to
  586 address new problems or concerns.
  587 
  588 Each version is given a distinguishing version number.  If the
  589 Program specifies that a certain numbered version of the GNU General
  590 Public License ``or any later version'' applies to it, you have the
  591 option of following the terms and conditions either of that numbered
  592 version or of any later version published by the Free Software
  593 Foundation.  If the Program does not specify a version number of the
  594 GNU General Public License, you may choose any version ever published
  595 by the Free Software Foundation.
  596 
  597 If the Program specifies that a proxy can decide which future
  598 versions of the GNU General Public License can be used, that proxy's
  599 public statement of acceptance of a version permanently authorizes you
  600 to choose that version for the Program.
  601 
  602 Later license versions may give you additional or different
  603 permissions.  However, no additional obligations are imposed on any
  604 author or copyright holder as a result of your choosing to follow a
  605 later version.
  606 
  607 \item Disclaimer of Warranty.
  608 
  609 \begin{sloppypar}
  610  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
  611  APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE
  612  COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM ``AS IS''
  613  WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED,
  614  INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  615  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE
  616  RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.
  617  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL
  618  NECESSARY SERVICING, REPAIR OR CORRECTION.
  619 \end{sloppypar}
  620 
  621 \item Limitation of Liability.
  622 
  623  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN
  624  WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES
  625  AND/OR CONVEYS THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR
  626  DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL
  627  DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM
  628  (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED
  629  INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE
  630  OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH
  631  HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
  632  DAMAGES.
  633 
  634 \item Interpretation of Sections 15 and 16.
  635 
  636 If the disclaimer of warranty and limitation of liability provided
  637 above cannot be given local legal effect according to their terms,
  638 reviewing courts shall apply local law that most closely approximates
  639 an absolute waiver of all civil liability in connection with the
  640 Program, unless a warranty or assumption of liability accompanies a
  641 copy of the Program in return for a fee.
  642 
  643 \begin{center}
  644 {\Large\sc End of Terms and Conditions}
  645 
  646 \bigskip
  647 How to Apply These Terms to Your New Programs
  648 \end{center}
  649 
  650 If you develop a new program, and you want it to be of the greatest
  651 possible use to the public, the best way to achieve this is to make it
  652 free software which everyone can redistribute and change under these terms.
  653 
  654 To do so, attach the following notices to the program.  It is safest
  655 to attach them to the start of each source file to most effectively
  656 state the exclusion of warranty; and each file should have at least
  657 the ``copyright'' line and a pointer to where the full notice is found.
  658 
  659 {\footnotesize
  660 \begin{verbatim}
  661 <one line to give the program's name and a brief idea of what it does.>
  662 
  663 Copyright (C) <textyear>  <name of author>
  664 
  665 This program is free software: you can redistribute it and/or modify
  666 it under the terms of the GNU General Public License as published by
  667 the Free Software Foundation, either version 3 of the License, or
  668 (at your option) any later version.
  669 
  670 This program is distributed in the hope that it will be useful,
  671 but WITHOUT ANY WARRANTY; without even the implied warranty of
  672 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  673 GNU General Public License for more details.
  674 
  675 You should have received a copy of the GNU General Public License
  676 along with this program.  If not, see <http://www.gnu.org/licenses/>.
  677 \end{verbatim}
  678 }
  679 
  680 Also add information on how to contact you by electronic and paper mail.
  681 
  682 If the program does terminal interaction, make it output a short
  683 notice like this when it starts in an interactive mode:
  684 
  685 {\footnotesize
  686 \begin{verbatim}
  687 <program>  Copyright (C) <year>  <name of author>
  688 
  689 This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
  690 This is free software, and you are welcome to redistribute it
  691 under certain conditions; type `show c' for details.
  692 \end{verbatim}
  693 }
  694 
  695 The hypothetical commands {\tt show w} and {\tt show c} should show
  696 the appropriate
  697 parts of the General Public License.  Of course, your program's commands
  698 might be different; for a GUI interface, you would use an ``about box''.
  699 
  700 You should also get your employer (if you work as a programmer) or
  701 school, if any, to sign a ``copyright disclaimer'' for the program, if
  702 necessary.  For more information on this, and how to apply and follow
  703 the GNU GPL, see \texttt{http://www.gnu.org/licenses/}.
  704 
  705 The GNU General Public License does not permit incorporating your
  706 program into proprietary programs.  If your program is a subroutine
  707 library, you may consider it more useful to permit linking proprietary
  708 applications with the library.  If this is what you want to do, use
  709 the GNU Lesser General Public License instead of this License.  But
  710 first, please read \texttt{http://www.gnu.org/philosophy/why-not-lgpl.html}.
  711 
  712 \end{enumerate}