Accord.Math.RelativeConvergence.checkConvergence C# (CSharp) Method

        private bool checkConvergence()
        {
            if (maxIterations > 0 && CurrentIteration >= maxIterations)
                return true;

            if (tolerance > 0)
            {
                // Stopping criteria is likelihood convergence
                double delta = Math.Abs(OldValue - NewValue);

                if (delta <= tolerance * Math.Abs(OldValue))
                    return true;
            }

            // Check if we have reached an invalid or perfectly separable answer
            if (Double.IsNaN(NewValue) || Double.IsInfinity(NewValue))
                return true;

            return false;
        }