Content stub — prose, diagrams, and Lean 4 exercises to be written.
This week covers: 4-bonacci recurrence. Dominant root Δ. nBonacciRingSize(4) = 56. chDelta-tetranacci.html.
Primary chapter references from book/: chDelta-tetranacci.html
-- dm³ 102 · Week 09 · Lean 4 Lab -- Operator: Δ (≈ 1.927 Tetranacci) -- TODO: fill in theorems and exercises -- stub example : True := trivial