Content stub — prose, diagrams, and Lean 4 exercises to be written.
This week covers: ch4-neural.html and ch6-resonance.html: dm³ applied to biological rhythms. φ in heart-rate variability.
Primary chapter references from book/: chPI-recurrence.html, ch9-phi.html
-- dm³ 101 · Week 14 · Lean 4 Lab -- Operator: G² (2nd Iteration) -- TODO: fill in theorems and exercises -- stub example : True := trivial