COPYING

FastJet is released under the terms of the GNU General Public License
v2 (GPLv2). FastJet includes a significant body of third-party code,
for example for third party plugin algorithms and for computational
geometry methods. These too are usually released under the GPL or
permissive licenses. Details are given below on a case-by-case basis.

A copy of the GPLv2 is to be found at the end of this file.

While the GPL license grants you considerable freedom, please bear in
mind that FastJet's use falls under guidelines similar to those that
are standard for Monte Carlo event generators
(http://www.montecarlonet.org/GUIDELINES). In particular, if you use
this code as part of work towards a scientific publication, whether
directly or contained within another program (e.g. Delphes, SpartyJet,
Rivet, LHC collaboration software frameworks, etc.), you should
include a citation to

  arXiv:1111.6097 (FastJet User Manual)
  and, optionally, Phys.Lett.B641 (2006) 57 [arXiv:hep-ph/0512210]

A number of other citations may also be relevant, for example for jet
areas and subtraction, boosted object taggers, plugins and the
underlying computational geometry methods and codes. Plugins generally
indicate the appropriate reference in a banner. References for other
features are to be found in the FastJet manual.


======================================================================
Plugins 
======================================================================

For the plugin jet finders, the licensing situation is as follows:

----------------------------------------------------------------------
. ATLAS Cone: the code was taken from SpartyJet v1.20. (GPLv2?)
  Licensing situation currently undergoing confirmation.

----------------------------------------------------------------------
. CDF code: originally provided by J.Huston 

  See http://www.pa.msu.edu/~huston/Les_Houches_2005/JetClu+Midpoint-StandAlone.tgz
  for the original code.

  Informal agreement for distribution under the terms of the GPL was
  obtained from Robert Roser on 13 April 2011. We are awaiting final
  confirmation.
  

----------------------------------------------------------------------
. CMS Iterative Cone: 
  Code taken from http://cmssw.cvs.cern.ch/cgi-bin/cmssw.cgi/CMSSW
  GPL(v2) (permission granted by R.Harris)

  From: Robert M Harris <rharris@fnal.gov>
  To: Gregory Soyez <soyez@fastjet.fr>, 
      Matteo Cacciari <cacciari@lpthe.jussieu.fr>, 
      Gavin Salam <salam@lpthe.jussieu.fr>
  Cc: Daniele.Del.Re@cern.ch, 
      Salvatore Rappoccio <rappoccio@gmail.com>, 
      Robert M Harris <rharris@fnal.gov>
  Subject: Re: CMS Iterative Cone license
  Date: Mon, 21 Nov 2011 14:05:55 -0600
  
  Dear Gregory, Matteo and Gavin,
    
     As a jet object coordinator for the CMS collaboration, and having
  consulted and obtained the consent of the other authors, I hereby
  grant you permission to distribute our code for the CMS Iterative
  Cone jet algorithm under the terms of the GNU Public License (v2).
  
  Best Regards,
  Robert Harris


----------------------------------------------------------------------
. D0 RunI and RunII cone plugins: 
  Standalone version provided by Lars Sonnenschein. 
  Permission to distribute it under the terms of the GPL(v2) granted
  by Lars Sonnenschein on behalf of the D0 collaboration

  From: Lars Sonnenschein <sonne@mail.cern.ch>
  To: Gregory Soyez <soyez@fastjet.fr>
  Cc: Matteo Cacciari <matteo.cacciari@cern.ch>, 
      Gavin Salam <salam@lpthe.jussieu.fr>
  Subject: Re: D0 cone license
  Date: Mon, 12 Dec 2011 18:17:05 +0100
  
  Dear Gregory, all,
  after some iterations with the D0 spoke persons and other programmers who 
  have been involved in writing the C++ implementation within the D0 
  software framework, the conclusion is that D0 grants the permission:
  
  "As an author of the D0 Run I and D0 Run II cone code, and having
  consulted and obtained the consent of the other authors (D0 collaboration),
  I hereby grant you permission to distribute my/our code for the
  D0 Run I and Run II cone jet algorithms under the terms of the GNU 
  General Public License (v2).".
  
  Citation and/or banner should then also give credit to the D0 
  collaboration.
  
  Kind regards
  Lars


----------------------------------------------------------------------
. PxCone code: GPL(v2) (permission granted by M.H.Seymour)

  From: Mike Seymour <Michael.Seymour@cern.ch>
  To: Gavin Salam <gavin.salam@cern.ch>
  Subject: Re: PxCone licence
  Date: Wed, 9 Nov 2011 15:15:08 +0000
  
  Dear Gavin, 

  As an author of the PxCone code, and having checked that this is
  acceptable with the other authors of PxCone (Luis Del Pozo and his
  then PhD supervisor David Ward), I hereby grant you the right to
  distribute PxCone together with FastJet under a GPL (v2) license.

  Many thanks for dealing with this,
  Mike. 

----------------------------------------------------------------------
. SISCone code: GPL(v2)
  see http://projects.hepforge.org/siscone/ for details

----------------------------------------------------------------------
. TrackJet: available under the GPL (v2) from Rivet (v1.1.2)
  see http://projects.hepforge.org/rivet/

----------------------------------------------------------------------
. EECambridge, GridJet, Jade and NestedDefs have been written by the
  FastJet authors and are thus distributed under the GNU Public
  License (v2).

----------------------------------------------------------------------
The "interface" parts of the plugins are GPL (v2).

======================================================================
CGAL
======================================================================

CGAL is not distributed with FastJet. Some parts of CGAL are released
under a QPL license. Given this license's compatibility issues with
the GPL, and for the purpose of resolving any ambiguity on this point,
we explicitly grant permission for FastJet to be linked with CGAL.

======================================================================
Fortune's Voronoi code
======================================================================

This code, Copyright(c)1994 by AT&T Bell Laboratories is distributed
under a non-restrictive license that allows for copying, modification
and distribution as long as the original copyright notice is left
unchanged. Modifications made subsequently by Shane O'Sullivan and
Gregory Soyez are distributed under similar conditions.

======================================================================
Chan's closest neighbour algorithm
======================================================================

The code for this has been written by the FastJet authors.


======================================================================
======================================================================
======================================================================
		    GNU GENERAL PUBLIC LICENSE
		       Version 2, June 1991

 Copyright (C) 1989, 1991 Free Software Foundation, Inc.
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		     END OF TERMS AND CONDITIONS

	    How to Apply These Terms to Your New Programs

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    <one line to give the program's name and a brief idea of what it does.>
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Also add information on how to contact you by electronic and paper mail.

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  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
  `Gnomovision' (which makes passes at compilers) written by James Hacker.

  <signature of Ty Coon>, 1 April 1989
  Ty Coon, President of Vice

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