As the absolute error is in O(να) we obtain a require ε error level using a α proportional to log(ε)/log(ν) which results in a final complexity in O(log(ε)/log(ν) × a2). Unfortunately, this last method requires to use delicate linear algebra techniques and is therefore more difficult to implement. Another better possibility is to use the corollary 5 to get the following fast and easy to implement algorithm: