code: func calculateSigma(dimensions, guesses int) float64 {
  	return math.Pow(3*math.Pow(float64(guesses), 1/float64(dimensions)), -1)
  }
docs: // calculateSigma will calculate sigma based on the provided information.
  // Typically, sigma will decrease as the number of sampled points
  // increases.
  //
  // sigma = (3*(m^(1/n)))^-1
  //