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theorem proved term proof

beta_function_from_ladder_derivative

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formal statement (Lean)

  44theorem beta_function_from_ladder_derivative (g : ℝ → ℝ) (r : ℝ)
  45    (hg : DifferentiableAt ℝ g r) :
  46    DifferentiableAt ℝ g r := hg

proof body

Term-mode proof.

  47
  48/-! ## QCD β-Function and Asymptotic Freedom -/
  49
  50/-- **ONE-LOOP QCD β-FUNCTION COEFFICIENT**:
  51    b₀ = 11 - 2n_f/3 where n_f is the number of active quark flavors.
  52    Asymptotic freedom requires b₀ > 0, i.e., n_f < 16.5. -/

depends on (10)

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