code: def delta_eps_mu(*, eps: float, mu: float) -> float:
      """
      Compute dual between mu-GDP and (epsilon, delta)-DP.
  
      Args:
          eps: eps
          mu: mu
      """
      return norm.cdf(-eps / mu + mu / 2) - np.exp(eps) * norm.cdf(
          -eps / mu - mu / 2
      )
  
file_path: opacus/opacus/accountants/analysis/gdp.py
imports: import numpy
  from scipy import optimize
  from scipy.stats import norm
label_desc: Use image node_id 3 for calling a global function with example usage: delta_eps_mu() and returns: unknown