petsc-3.12.4 2020-02-04
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# License

## 2-clause BSD license

    Copyright (c) 1991-2014, UChicago Argonne, LLC and the PETSc Development Team
    All rights reserved.

    Redistribution and use in source and binary forms, with or without modification,
    are permitted provided that the following conditions are met:

    * Redistributions of source code must retain the above copyright notice, this
      list of conditions and the following disclaimer.
    * Redistributions in binary form must reproduce the above copyright notice, this
      list of conditions and the following disclaimer in the documentation and/or
      other materials provided with the distribution.

    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
    ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
    WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
    DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
    ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
    (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
    LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
    ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
    (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
    SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

This license DOES NOT apply to any software that may be obtained via the `--download-package` option of the PETSc configuration. Each of those packages are covered by their own licenses.

## Contributing

Contributions are preferred via GitLab merge request to `https://gitlab.com/petsc/petsc` or via patches (`git send-email` or `git format-patch`) sent to `petsc-dev@mcs.anl.gov`. If you are planning a large contribution, we encourage you to discuss the concept on the mailing list and interact with us frequently to ensure that your effort is well-directed. See the Development Wiki for further details.

PETSc is distributed under a 2-clause BSD license (see above). The act of submitting a pull request or patch (with or without an explicit Signed-off-by tag) will be understood as an affirmation of the following:

      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.

### Old License

Previous versions of PETSc were distributed under the old PETSc license.