def cesFun (J : ℕ) (a : Fin J → ℝ) (ρ : ℝ) : (Fin J → ℝ) → ℝ := fun x => (∑ j : Fin J, a j * (x j) ^ ρ) ^ (1 / ρ)
thesis/CESProofs/Foundations/Defs.lean:46
Core definitions for the Lean formalization of Paper 1: