.. _license:

=======
License
=======

This software, as a whole, is free for use and modification in non-commercial
context, for example academic use. Distributing modified versions in general
requires distribution of the modified source code at the same time.

This software incorporates parts under GNU General Public License and more
restrictive licenses:

    ``src/usadel1/*``
        Distributed under :ref:`gpl-license`
   
    ``src/hdf5pickle/*``
        Distributed under :ref:`bsd-license`

    ``src/third-party/bvp/colnew.f90``
        Distributed under :ref:`acm-license`
    
    ``src/third-party/bvp/twpbvpc.f90``
        Probably free for only non-commercial use
    
    ``src/third-party/*`` (other than mentioned above)
        BSD or Public Domain.


On citations
============

If you use this software in academic publications, we encourage you to cite it
appropriately, for example referring to our articles detailing its use. For
example (in BibTeX)::

    @Article{
        author = {P. Virtanen and T.T. Heikkilä}
        title = {Thermoelectric effects in superconducting proximity structures},
        journal = {Appl. Phys. A},
        volume = {89},
        pages = {625},
        year = {2007},
        note = {Source code available at http://ltl.tkk.fi/~theory/usadel1/}
    }

.. _gpl-license:

GNU General Public License
==========================

| Version 2, June 1991
|
| Copyright © 1989, 1991 Free Software Foundation, Inc.
|                 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
|
| Everyone is permitted to copy and distribute verbatim copies
| of this license document, but changing it is not allowed.
    
Preamble
--------
    
The licenses for most software are designed to take away your
freedom to share and change it.  By contrast, the GNU General Public
License is intended to guarantee your freedom to share and change free
software--to make sure the software is free for all its users.  This
General Public License applies to most of the Free Software
Foundation's software and to any other program whose authors commit to
using it.  (Some other Free Software Foundation software is covered by
the GNU Library General Public License instead.)  You can apply it to
your programs, too.

When we speak of free software, we are referring to freedom, not
price.  Our General Public Licenses are designed to make sure that you
have the freedom to distribute copies of free software (and charge for
this service if you wish), that you receive source code or can get it
if you want it, that you can change the software or use pieces of it
in new free programs; and that you know you can do these things.

To protect your rights, we need to make restrictions that forbid
anyone to deny you these rights or to ask you to surrender the rights.
These restrictions translate to certain responsibilities for you if you
distribute copies of the software, or if you modify it.

For example, if you distribute copies of such a program, whether
gratis or for a fee, you must give the recipients all the rights that
you have.  You must make sure that they, too, receive or can get the
source code.  And you must show them these terms so they know their
rights.

We protect your rights with two steps: (1) copyright the software, and
(2) offer you this license which gives you legal permission to copy,
distribute and/or modify the software.

Also, for each author's protection and ours, we want to make certain
that everyone understands that there is no warranty for this free
software.  If the software is modified by someone else and passed on, we
want its recipients to know that what they have is not the original, so
that any problems introduced by others will not reflect on the original
authors' reputations.

Finally, any free program is threatened constantly by software
patents.  We wish to avoid the danger that redistributors of a free
program will individually obtain patent licenses, in effect making the
program proprietary.  To prevent this, we have made it clear that any
patent must be licensed for everyone's free use or not licensed at all.

The precise terms and conditions for copying, distribution and
modification follow.
    
TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
---------------------------------------------------------------
    
0. This License applies to any program or other work which contains
   a notice placed by the copyright holder saying it may be distributed
   under the terms of this General Public License.  The "Program", below,
   refers to any such program or work, and a "work based on the Program"
   means either the Program or any derivative work under copyright law:
   that is to say, a work containing the Program or a portion of it,
   either verbatim or with modifications and/or translated into another
   language.  (Hereinafter, translation is included without limitation in
   the term "modification".)  Each licensee is addressed as "you".
   
   Activities other than copying, distribution and modification are not
   covered by this License; they are outside its scope.  The act of
   running the Program is not restricted, and the output from the Program
   is covered only if its contents constitute a work based on the
   Program (independent of having been made by running the Program).
   Whether that is true depends on what the Program does.
    
1. You may copy and distribute verbatim copies of the Program's
   source code as you receive it, in any medium, provided that you
   conspicuously and appropriately publish on each copy an appropriate
   copyright notice and disclaimer of warranty; keep intact all the
   notices that refer to this License and to the absence of any warranty;
   and give any other recipients of the Program a copy of this License
   along with the Program.
   
   You may charge a fee for the physical act of transferring a copy, and
   you may at your option offer warranty protection in exchange for a fee.
    
2. You may modify your copy or copies of the Program or any portion
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   above, provided that you also meet all of these conditions:
   
   a) You must cause the modified files to carry prominent notices
      stating that you changed the files and the date of any change.
    
   b) You must cause any work that you distribute or publish, that in
      whole or in part contains or is derived from the Program or any
      part thereof, to be licensed as a whole at no charge to all third
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   c) If the modified program normally reads commands interactively
      when run, you must cause it, when started running for such
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   These requirements apply to the modified work as a whole.  If
   identifiable sections of that work are not derived from the Program,
   and can be reasonably considered independent and separate works in
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   sections when you distribute them as separate works.  But when you
   distribute the same sections as part of a whole which is a work based
   on the Program, the distribution of the whole must be on the terms of
   this License, whose permissions for other licensees extend to the
   entire whole, and thus to each and every part regardless of who wrote it.

   Thus, it is not the intent of this section to claim rights or contest
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   In addition, mere aggregation of another work not based on the Program
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3. You may copy and distribute the Program (or a work based on it,
   under Section 2) in object code or executable form under the terms of
   Sections 1 and 2 above provided that you also do one of the following:

   a) Accompany it with the complete corresponding machine-readable
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   b) Accompany it with a written offer, valid for at least three
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   c) Accompany it with the information you received as to the offer
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   The source code for a work means the preferred form of the work for
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   If distribution of executable or object code is made by offering
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   distribution of the source code, even though third parties are not
   compelled to copy the source along with the object code.

4. You may not copy, modify, sublicense, or distribute the Program
   except as expressly provided under this License.  Any attempt
   otherwise to copy, modify, sublicense or distribute the Program is
   void, and will automatically terminate your rights under this License.
   However, parties who have received copies, or rights, from you under
   this License will not have their licenses terminated so long as such
   parties remain in full compliance.
    
5. You are not required to accept this License, since you have not
   signed it.  However, nothing else grants you permission to modify or
   distribute the Program or its derivative works.  These actions are
   prohibited by law if you do not accept this License.  Therefore, by
   modifying or distributing the Program (or any work based on the
   Program), you indicate your acceptance of this License to do so, and
   all its terms and conditions for copying, distributing or modifying
   the Program or works based on it.

6. Each time you redistribute the Program (or any work based on the
   Program), the recipient automatically receives a license from the
   original licensor to copy, distribute or modify the Program subject to
   these terms and conditions.  You may not impose any further
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7. If, as a consequence of a court judgment or allegation of patent
   infringement or for any other reason (not limited to patent issues),
   conditions are imposed on you (whether by court order, agreement or
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   excuse you from the conditions of this License.  If you cannot
   distribute so as to satisfy simultaneously your obligations under this
   License and any other pertinent obligations, then as a consequence you
   may not distribute the Program at all.  For example, if a patent
   license would not permit royalty-free redistribution of the Program by
   all those who receive copies directly or indirectly through you, then
   the only way you could satisfy both it and this License would be to
   refrain entirely from distribution of the Program.
   
   If any portion of this section is held invalid or unenforceable under
   any particular circumstance, the balance of the section is intended to
   apply and the section as a whole is intended to apply in other
   circumstances.
   
   It is not the purpose of this section to induce you to infringe any
   patents or other property right claims or to contest validity of any
   such claims; this section has the sole purpose of protecting the
   integrity of the free software distribution system, which is
   implemented by public license practices.  Many people have made
   generous contributions to the wide range of software distributed
   through that system in reliance on consistent application of that
   system; it is up to the author/donor to decide if he or she is willing
   to distribute software through any other system and a licensee cannot
   impose that choice.
   
   This section is intended to make thoroughly clear what is believed to
   be a consequence of the rest of this License.
   
8. If the distribution and/or use of the Program is restricted in
   certain countries either by patents or by copyrighted interfaces, the
   original copyright holder who places the Program under this License
   may add an explicit geographical distribution limitation excluding
   those countries, so that distribution is permitted only in or among
   countries not thus excluded.  In such case, this License incorporates
   the limitation as if written in the body of this License.
    
9. The Free Software Foundation may publish revised and/or new versions
   of the General Public License from time to time.  Such new versions will
   be similar in spirit to the present version, but may differ in detail to
   address new problems or concerns.
    
   Each version is given a distinguishing version number.  If the Program
   specifies a version number of this License which applies to it and "any
   later version", you have the option of following the terms and conditions
   either of that version or of any later version published by the Free
   Software Foundation.  If the Program does not specify a version number of
   this License, you may choose any version ever published by the Free Software
   Foundation.
    
10. If you wish to incorporate parts of the Program into other free
    programs whose distribution conditions are different, write to the author
    to ask for permission.  For software which is copyrighted by the Free
    Software Foundation, write to the Free Software Foundation; we sometimes
    make exceptions for this.  Our decision will be guided by the two goals
    of preserving the free status of all derivatives of our free software and
    of promoting the sharing and reuse of software generally.
    
NO WARRANTY
-----------
    
11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
    FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
    OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
    PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
    OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
    MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
    TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
    PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
    REPAIR OR CORRECTION.
    
12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
    WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
    REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
    INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
    OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
    TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
    YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
    PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
    POSSIBILITY OF SUCH DAMAGES.
    
END OF TERMS AND CONDITIONS



.. _acm-license:

ACM Software License Agreement
==============================

    From http://www.acm.org/publications/policies/softwarecrnotice

All software, both binary and source published by the Association for Computing
Machinery (hereafter, Software) is copyrighted by the Association (hereafter,
ACM) and ownership of all right, title and interest in and to the Software
remains with ACM. By using or copying the Software, User agrees to abide by the
terms of this Agreement.  Noncommercial Use

The ACM grants to you (hereafter, User) a royalty-free, nonexclusive right to
execute, copy, modify and distribute both the binary and source code solely for
academic, research and other similar noncommercial uses, subject to the
following conditions:

1. User acknowledges that the Software is still in the development stage and
   that it is being supplied "as is," without any support services from ACM.
   Neither ACM nor the author makes any representations or warranties, express
   or
   implied, including, without limitation, any representations or warranties of
   the merchantability or fitness for any particular purpose, or that the
   application of the software, will not infringe on any patents or other
   proprietary rights of others.

2. ACM shall not be held liable for direct, indirect, incidental or
   consequential damages arising from any claim by User or any third party
   with respect to uses allowed under this Agreement, or from any use of
   the Software.

3. User agrees to fully indemnify and hold harmless ACM and/or the
   author(s) of the original work from and against any and all claims,
   demands, suits, losses, damages, costs and expenses arising out of
   the User's use of the Software, including, without limitation, arising
   out of the User's modification of the Software.

4. User may modify the Software and distribute that modified work to third
   parties provided that: (a) if posted separately, it clearly acknowledges
   that it contains material copyrighted by ACM (b) no charge is associated
   with such copies, (c) User agrees to notify ACM and the Author(s) of the
   distribution, and (d) User clearly notifies secondary users that such
   modified work is not the original Software.

5. User agrees that ACM, the authors of the original work and others may
   enjoy a royalty-free, non-exclusive license to use, copy, modify and
   redistribute these modifications to the Software made by the User and
   distributed to third parties as a derivative work under this agreement.

6. This agreement will terminate immediately upon User's breach of, or
   non-compliance with, any of its terms. User may be held liable for any
   copyright infringement or the infringement of any other proprietary rights
   in the Software that is caused or facilitated by the User's failure to
   abide by the terms of this agreement.

7. This agreement will be construed and enforced in accordance with the law
   of the state of New York applicable to contracts performed entirely within
   the State. The parties irrevocably consent to the exclusive jurisdiction
   of the state or federal courts located in the City of New York for all
   disputes concerning this agreement. 

Commercial Use
--------------
Any User wishing to make a commercial use of the Software must contact ACM at
permissions@acm.org to arrange an appropriate license. Commercial use includes
(1) integrating or incorporating all or part of the source code into a product
for sale or license by, or on behalf of, User to third parties, or (2)
distribution of the binary or source code to third parties for use with a
commercial product sold or licensed by, or on behalf of, User.

.. _bsd-license:

BSD license (3-clause)
======================

Copyright © 2006 Pauli Virtanen. All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:

    1. Redistributions of source code must retain the above copyright
       notice, this list of conditions and the following disclaimer.
    2. Redistributions in binary form must reproduce the above copyright
       notice, this list of conditions and the following disclaimer
       in the documentation and/or other materials provided with
       the distribution.
    3. Neither the names of the copyright holders nor the names of 
       contributors may be used to endorse or promote products derived
       from this software without specific prior written permission. 

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

