theorem gibbsZ_pos [NeZero J] (ε x : Fin J → ℝ) (T h : ℝ) : 0 < gibbsZ ε x T h := Finset.sum_pos (fun j _ => gibbsWeight_pos ε x T h j) Finset.univ_nonempty
thesis/CESProofs/Dynamics/GibbsMeasure.lean:66
Gibbs Measure for Finite Discrete Systems: