deal.II Copyright and License
This directory contains the deal.II library.
The deal.II library is copyrighted by the deal.II authors. This term
refers to the people listed in the file
AUTHORS and in the
authors list on the webpage.
The deal.II library is free software; you can use it, redistribute it, and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The full text of the GNU Lesser General Public version 2.1 is quoted below.
As a contributor to this project, you agree that all of your contributions be governed by the Developer Certificate of Origin version 1.1. The deal.II project does not require copyright assignments for contributions. This means that the copyright for code contributions in the deal.II project is held by its respective contributors who have each agreed to release their contributed code under a compatible open source license (LGPL v2.1 for library code). The full text of the Developer Certificate of Origin version 1.1 is quoted below.
Referencing the library
In addition to the terms imposed by the LGPL v2.1 or later, we ask for the following courtesy:
- Every publication presenting numerical results obtained with the help of deal.II should state the name of the library and cite appropriate deal.II references listed at the top of the publications page.
This is the usual, fair way of giving credit to contributors to a scientific result. In addition, it helps us justify our effort in developing deal.II as an academic undertaking.
We keep a list of publications using deal.II. Let us know about your publications so that we can add them to the aforementioned list. You can do this by emailing the reference information to one of the Principal Developers of deal.II.
Bundled third party software in the deal.II repository
bundled/ contains third party software. Please note
that the software located there is copyrighted by their respective
authors (independent of the deal.II authors) and are covered by
The libraries listed above are all open source and as such place few
restrictions on their use. However, if you want to distribute software
developed with deal.II (in source or binary form) and you are using the
packages above (with source code in
bundled/), then they may impose
different terms. Please consult the licenses of these packages for more
Alternatively, the configuration process of deal.II allows you to
bundled/ directory entirely, or disable any or all of
these bundled libraries. In that case, you can not use their functionality
but you also are not restricted by their license.
For further questions regarding licensing and commercial use please contact the deal.II principal developers, or project administrators directly.
Developer Certificate of Origin Version 1.1 Copyright (C) 2004, 2006 The Linux Foundation and its contributors. 1 Letterman Drive Suite D4700 San Francisco, CA, 94129 Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. Developer's Certificate of Origin 1.1 By making a contribution to this project, I certify that: (a) The contribution was created in whole or in part by me and I have the right to submit it under the open source license indicated in the file; or (b) The contribution is based upon previous work that, to the best of my knowledge, is covered under an appropriate open source license and I have the right under that license to submit that work with modifications, whether created in whole or in part by me, under the same open source license (unless I am permitted to submit under a different license), as indicated in the file; or (c) The contribution was provided directly to me by some other person who certified (a), (b) or (c) and I have not modified it. (d) I understand and agree that this project and the contribution are public and that a record of the contribution (including all personal information I submit with it, including my sign-off) is maintained indefinitely and may be redistributed consistent with this project or the open source license(s) involved.
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