The real-space TDDFT code octopus (“octopus”) is provided under the GNU General Public License (“GPL”), Version 2, with exceptions for external libraries that are contained solely for convenience in this distribution.

You can find a copy of the GPL license [ here. ]

A copy of the exceptions and licenses follow this introduction.


Octopus provides several external libraries, which are located in the “external_libs” subdirectory of the octopus source distribution. The GNU General Public License does not apply to these libraries. Separate copyright notices can be found for each library in the respective subdirectories of “external_libs”. Copyright notices are also contained in this document.

Currently the following external libraries are provided:


Metis 4.0

The ParMETIS/METIS package is copyrighted by the Regents of the University of Minnesota. It can be freely used for educational and research purposes by non-profit institutions and US government agencies only. Other organizations are allowed to use ParMETIS/METIS only for evaluation purposes, and any further uses will require prior approval. The software may not be sold or redistributed without prior approval. One may make copies of the software for their use provided that the copies, are not sold or distributed, are used under the same terms and conditions.

As unestablished research software, this code is provided on an ``as is'' basis without warranty of any kind, either expressed or implied. The downloading, or executing any part of this software constitutes an implicit agreement to these terms. These terms and conditions are subject to change at any time without prior notice.


*Robert Renka *University of North Texas *(817) 565-2767

ACM Software Copyright Notice


Copyright (c) 1998 Association for Computing Machinery, Inc. Permission to include in application software or to make digital or hard copies of part or all of this work is subject to the following licensing agreement.

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Revised 6/98