theorem gibbsProb_sum_one [NeZero J] (ε x : Fin J → ℝ) (T h : ℝ) :
∑ j : Fin J, gibbsProb ε x T h j = 1 := by
simp only [gibbsProb]
rw [← Finset.sum_div]
exact div_self (ne_of_gt (gibbsZ_pos ε x T h))Gibbs Measure for Finite Discrete Systems: