def IsPowerMean (J : ℕ) (F : AggFun J) : Prop := ∃ (ρ : ℝ) (hρ : ρ ≠ 0), F = powerMean J ρ hρ
thesis/CESProofs/Foundations/Defs.lean:113
Core definitions for the Lean formalization of Paper 1: