Content stub — prose, diagrams, and Lean 4 exercises to be written.
This week covers: Lean 4 companion matrix, spectral radius type. The chRho sorry inventory. Target: close 3 ρ-theorems this week.
Primary chapter references from book/: spectral-radius.html, spectral-radius-v2.html
-- dm³ 103 · Week 11 · Lean 4 Lab -- Operator: ρ (Spectral Radius · Collatz) -- TODO: fill in theorems and exercises -- stub example : True := trivial