the logarithmic integral LI(X).
        </li>
        <li>
          <b>LOGISTIC_CDF_VALUES</b> returns some values of the Logistic CDF.
        </li>
        <li>
          <b>MATHIEU_EVEN_VALUES</b> returns eigenvalues of even Mathieu solutions.
        </li>
        <li>
          <b>MATHIEU_ODD_VALUES</b> returns eigenvalues of odd Mathieu solutions.
        </li>
        <li>
          <b>MERTENS_VALUES</b> returns some values of the Mertens function.
        </li>
        <li>
          <b>MOEBIUS_VAL