def powerMean (J : ℕ) (ρ : ℝ) (_hρ : ρ ≠ 0) : AggFun J := fun x => ((1 / J : ℝ) * ∑ j : Fin J, (x j) ^ ρ) ^ (1 / ρ)
thesis/CESProofs/Foundations/Defs.lean:41
Core definitions for the Lean formalization of Paper 1: