A curriculum, not a textbook

Walk the path from foundations to mastery — three times.

One source, the sciences and humanities together. Every unit speaks at three levels. Beginner for the intuitive picture. Intermediate for the formal definition with proofs and exercises. Master for graduate-level depth, with primary-source citations.

820
Units
30
Sections
3
Tiers per unit

The full curriculum

What this is

A self-contained curriculum across the sciences and humanities — math, physics, chemistry, biology, philosophy, language, and the social world. The same concept three times: an intuitive picture for the curious, a formal treatment with exercises for the rigorous, and a deep treatment with original-source citations for graduate readers.

Every unit anchors on the canonical literature of its field and contextualises the original conception alongside the modern synthesis. Cross-references are validated at build time. Where Mathlib covers a result, Lean formalisation status is tracked per-unit. The whole thing builds clean.