theorem specific_heat_zero_at_symmetry [NeZero J]
{c₀ : ℝ} (hc : 0 < c₀) (ρ : ℝ) :
specificHeat (fun _ : Fin J => c₀) ρ = 0 := by
unfold specificHeat
rw [escort_fisher_zero_at_symmetry hc ρ, mul_zero]### The Thermodynamic Decomposition of Value