PyAMG is distributed under LICENSE.txt:

Copyright (c) 2008-2022 PyAMG Developers License: MIT, http://opensource.org/licenses/MIT

We welcome bug reports and general improvements to the code. Please see the following for general guidelines for contributing (and refer to organization.md for details on developer roles):

• For general questions or bugs on PyAMG, performance problems, install failures, etc., please file an issue;
• For proposed changes to the code, please first open an issue followed by a pull request that refers to a specific issue number.
• To initiate a pull request:
  • fork the project
  • create a descriptive branch, e.g. git checkout -b fix-issue-999
  • initiate the pull request to pyamg:main
• Branches should avoid merge commits from main; instead please rebase before issuing a PR if possible.
• Commit messages should attempt to follow https://www.conventionalcommits.org/en/v1.0.0/

  <type>(<scope>): <description>
  fix      bug fix
  feat     new feature
  build    build system
  chore    general maintenance
  ci       ci configuration
  docs     documentation
  perf     performance improvements
  refactor refactoring code
  style    linting and code formatting
  test     add/modify testing
  

• Write commit messages in imperative mood

Contributing code to this project assumes that

• you implicitly transfer the copyright of your contribution to the PyAMG Developers or that your contributions are not significant enough to claim copyright

• you agree to the Developer Certificate of Origin for your contributing portion as described here (and below): http://developercertificate.org/

• there is no assumption that contributions will be retained or included in a release.

""" Developer Certificate of Origin Version 1.1

Copyright (C) 2004, 2006 The Linux Foundation and its contributors. 660 York Street, Suite 102, San Francisco, CA 94110 USA

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. """