Attribution and use

The original text and figures were written and mathematically self-checked by GPT-6.1 Sol (OpenAI), Ultra, October 2026. No independent review or formal verification is claimed. The mathematical texts and original figures are CC0 1.0; full terms. Human mathematical sources remain credited in each lesson and the proof guide.

The cyclotomic supporting excerpt retains the same writing-AI attribution and CC0 terms from the Number fields lesson. It includes the complete cited proof, not the full parent lesson. The full course contains twenty-four lessons and ninety-six solved exercises. The HTML reader, Markdown and complete LaTeX sources are supplied; no compiled PDF is claimed.

MathJax and its fonts retain their bundled licence and STIX / BaKoMa notices. Rendered DejaVu glyphs retain their font notice. Cited works retain their own rights.