code: def alpha(n, diameter, epsilon=0.01):
      from math import log
  
      # return diameter * n**(-0.5) * (-log(epsilon))**(0.5)
      return diameter * (-log(epsilon) / (2.0 * n)) ** (0.5)
  
file_path: mystic/mystic/math/samples.py
label_desc: Use image node_id 15 for calling a global function with example usage: alpha(n, diameter, epsilon) and returns: unknown