theorem gibbs_vri_full [NeZero J] (ε x : Fin J → ℝ) (T : ℝ) (hT : 0 < T) (h₀ : ℝ) :
let χ := (1 / T) * gibbsVariance ε x T h₀ (fun j => x j)
gibbsVariance ε x T h₀ (fun j => x j) = T * χ := by
simp only
field_simp### Derivative Form of the VRI