theorem ces_is_atkinson_swf (J : ℕ) (a : Fin J → ℝ) (ρ : ℝ) (c : Fin J → ℝ) : atkinsonSWF J a ρ c = cesFun J a ρ c := rfl
thesis/CESProofs/Applications/SocialWelfare.lean:57
CES as Atkinson Social Welfare Function