def knockoutRetained (J : ℕ) (ρ : ℝ) (m : ℕ) : ℝ := if ρ > 0 then ((↑J - ↑m) / ↑J : ℝ) ^ (1 / ρ) else if m = 0 then 1 else 0
thesis/CESProofs/Foundations/FurtherProperties.lean:62
Further properties of CES curvature (Paper 1, Section 9):