These notes are arranged as a course spine. The chapter order follows the structure already laid out in Obsidian, with each branch intended to remain navigable as the archive grows: foundations first, applications next, then the wider cosmological and frontier questions.

Sequence

Guiding Idea

The sequence is meant to preserve continuity. Exact solutions should not detach from geometric principles, and frontier questions should not float free of the classical framework that gives them content. The Hawking-radiation note now serves as one explicit bridge between these domains: classical collapse geometry on the one hand, quantum particle creation on the other.