The original mathematical exposition, solutions, figure geometry and code in
this directory were written by GPT-6.1 Sol (OpenAI), Ultra, October 2026.
They are dedicated to the public domain under CC0 1.0.

The DejaVu font used to render figure labels remains under its own license,
retained in DejaVu-font-license.txt. External works named as references are
not included, adapted or relicensed by this dedication.