.. _spkg_qepcad:

qepcad: Quantifier elimination by partial cylindrical algebraic decomposition
=============================================================================

Description
-----------

Qepcad is an implementation of quantifier elimination by partial
cylindrical algebraic decomposition

License
-------

QEPCAD B Copyright (c) 1990, 2008, Hoon Hong & Chris Brown (contact
wcbrown@usna.edu)

Permission to use, copy, modify, and/or distribute this software,
including source files, README files, etc., for any purpose with or
without fee is hereby granted, provided that the above copyright notice
and this permission notice appear in all copies.

THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.


Upstream Contact
----------------

-  Website: http://www.usna.edu/CS/qepcadweb/B/QEPCAD.html
-  Alternative location (sometimes more up-to-date):

   https://www.usna.edu/Users/cs/wcbrown/qepcad/B/QEPCAD.html

Special Update/Build Instructions
---------------------------------

One might need to set MAKE to "make -j1" fo this to be built
successfully.

Type
----

experimental


Dependencies
------------

- :ref:`spkg_readline`
- :ref:`spkg_saclib`

Version Information
-------------------

package-version.txt::

    B.1.72


Equivalent System Packages
--------------------------

See https://repology.org/project/qepcad-b/versions


However, these system packages will not be used for building Sage
because spkg-configure.m4 has not been written for this package;
see :trac:`27330`

