theorem twoFactorCES_symmetric {A α ρ : ℝ} (_hA : 0 < A)
(hα : 0 < α) (hα1 : α < 1) (hρ : ρ ≠ 0)
{x : ℝ} (hx : 0 < x) :
twoFactorCES A α ρ x x = A * x := by
simp only [twoFactorCES]
rw [cesInner_symmetric hα hα1]
rw [← rpow_mul (le_of_lt hx), mul_one_div_cancel hρ, rpow_one]Two-Factor CES Production Function (Layer 1 of Macro Extension)