Content stub — prose, diagrams, and Lean 4 exercises to be written.
This week covers: Periodic orbits in contact geometry. T* as minimal recurrence period. Connection to Fourier decomposition over ξ.
Primary chapter references from book/: chPI-recurrence.html
-- dm³ 101 · Week 05 · Lean 4 Lab -- Operator: π (T* = 2π) -- TODO: fill in theorems and exercises -- stub example : True := trivial