COPYING

Copyright notice for _all_ versions of btex:

Copyright (C) 2007 - 2019. P. Purkayastha <ppurka _at_ gmail _dot_ com>

This program is released under GPL-3 or later. If the license is not
mentioned in any version of the file, then the default version is GPL-3.

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 3 of the License, 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, see <http://www.gnu.org/licenses/>.