This file is indexed.

/usr/share/doc/lp-solve/copyright is in lp-solve 5.5.0.15-4+b1.

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The actual contents of the file can be viewed below.

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This package is currently maintained by
Juan Esteban Monsalve Tobon <esteban@v7w.com>.

It was created by James R. Van Zandt <jrv@vanzandt.mv.com> on
Thu, 21 Oct 1999 20:55:33 -0400.

The home page of the upstream package is:

  http://www.geocities.com/lpsolve/

It was downloaded from ftp://ftp.ics.ele.tue.nl/pub/lp_solve/

It can be downloaded from:

  http://groups.yahoo.com/group/lp_solve/files/Version4/

Upstream Authors:

  Michel Berkelaar <michel@ics.ele.tue.nl>
  Jeroen Dirks <jeroend@tor.numetrix.com>
  Kjell Eikland <kjell.eikland@broadpark.no>
  Peter Notebaert <peno@mailme.org>

Copyright:

bfp/bfp_LUSOL/LUSOL/hbio.c:
/*                    Harwell-Boeing File I/O in C
                                V. 1.0

           National Institute of Standards and Technology, MD.
                             K.A. Remington

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
                                NOTICE

 Permission to use, copy, modify, and distribute this software and
 its documentation for any purpose and without fee is hereby granted
 provided that the above copyright notice appear in all copies and
 that both the copyright notice and this permission notice appear in
 supporting documentation.

 Neither the Author nor the Institution (National Institute of Standards
 and Technology) make any representations about the suitability of this
 software for any purpose. This software is provided "as is" without
 expressed or implied warranty.
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

colamd/colamd.c:
        Copyright (c) 1998-2001 by the University of Florida.
        All Rights Reserved.

        THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY
        EXPRESSED OR IMPLIED.  ANY USE IS AT YOUR OWN RISK.

        Permission is hereby granted to use or copy this program for any
        purpose, provided the above notices are retained on all copies.
        User documentation of any code that uses this code must cite the
        Authors, the Copyright, and "Used by permission."  If this code is
        accessible from within Matlab, then typing "help colamd" and "help
        symamd" must cite the Authors.  Permission to modify the code and to
        distribute modified code is granted, provided the above notices are
        retained, and a notice that the code was modified is included with the
        above copyright notice.  You must also retain the Availability
        information below, of the original version.

        This software is provided free of charge.

lp_rlp.c:
/* A Bison parser, made by GNU Bison 2.3.  */

/* Skeleton implementation for Bison's Yacc-like parsers in C

   Copyright (C) 1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, 2006
   Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street, Fifth Floor,
   Boston, MA 02110-1301, USA.  */

/* As a special exception, you may create a larger work that contains
   part or all of the Bison parser skeleton and distribute that work
   under terms of your choice, so long as that work isn't itself a
   parser generator using the skeleton or a modified version thereof
   as a parser skeleton.  Alternatively, if you modify or redistribute
   the parser skeleton itself, you may (at your option) remove this
   special exception, which will cause the skeleton and the resulting
   Bison output files to be licensed under the GNU General Public
   License without this special exception.

   This special exception was added by the Free Software Foundation in
   version 2.2 of Bison.  */

lp_solve itself is LGPL.
On Debian GNU/Linux systems, the complete text of the GNU Lesser General
Public License can be found in `/usr/share/common-licenses/LGPL'