axiom kolmogorov_nagumo (J : ℕ) (F : AggFun J)
(hcont : IsContinuousAgg J F)
(hsymm : IsSymmetric J F)
(hincr : IsStrictlyIncreasing J F)
(hassoc : IsScaleConsistent J F) :
IsQuasiArithMean J F## Emergent CES: Classical Axioms and Main Theorem