Creative Commons Attribution 4.0 International

Copyright (c) 2026 K. Takahashi

This work is licensed under the Creative Commons Attribution 4.0 International
License (CC BY 4.0).

You are free to:
- Share: copy and redistribute the material in any medium or format.
- Adapt: remix, transform, and build upon the material for any purpose, even commercially.

Under the following terms:
- Attribution: You must give appropriate credit, provide a link to the license,
  and indicate if changes were made. You may do so in any reasonable manner, but
  not in any way that suggests the licensor endorses you or your use.
- No additional restrictions: You may not apply legal terms or technological
  measures that legally restrict others from doing anything the license permits.

Notices:
- You do not have to comply with the license for elements of the material in the
  public domain or where your use is permitted by an applicable exception or limitation.
- No warranties are given. The license may not give you all permissions necessary
  for your intended use.

License text:
https://creativecommons.org/licenses/by/4.0/
