# License and attribution

The FDTDX solver is distributed under the MIT License. In practical terms, it may be used, copied, modified, published, distributed, sublicensed, and sold, provided the copyright and license notice are retained. The software is supplied without warranty.

Copyright © 2025 Yannik Mahlau.

The authoritative license text is in `solver/LICENSE` in the repository checkout.

## Names and trademarks

- **FDTDX** refers to the upstream open-source project and Python package.
- **fdtdx-hoodlab** refers to this validation and development fork.
- **Tidy3D** is a separate product used to create selected frozen reference data. This project is not affiliated with or endorsed by Flexcompute.

The diagrams and documentation authored for this fork are distributed with the repository unless a file states otherwise. The upstream FDTDX logo assets are reused to preserve project identity.