theorem
proved
term proof
mass_evolution_exp_pos
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formal statement (Lean)
250theorem mass_evolution_exp_pos (n_f : ℕ) (h : n_f ≤ 16) :
251 0 < mass_evolution_exp n_f := by
proof body
Term-mode proof.
252 unfold mass_evolution_exp
253 exact div_pos mass_anomalous_dim_pos
254 (mul_pos (by norm_num) (asymptotic_freedom_criterion n_f h))
255
256/-- Concrete mass evolution exponents for physical n_f values. -/