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The anatomy of a lesson: intuition, formalism, derivations, solved sums, code and exercises — and which parts to skip.

Novice, Practitioner and Researcher routes through the same material, and how to switch between them.

A dependency graph of every module, so you always know what a lesson assumes before you open it.

Every symbol used on this site, defined once: scalars, vectors, matrices, operators, probability and asymptotics.

Spaced repetition, deliberate practice on solved sums, and why re-deriving beats re-reading.