several special functions, including the logarithm of the Gamma function.
    </p>

    <h3 align = "center">
      Reference:
    </h3>

    <p>
      <ol>
        <li>
          Malcolm Pike, David Hill,<br>
          Algorithm 291:
          Logarithm of Gamma Function,<br>
          Communications of the ACM,<br>
          Volume 9, Number 9, September 1966, page 684.
        </li>
      </ol>
    </p>

    <h3 align = "center">
      Source Code:
    </h3>

    <p>
      <ul>
        <li>
          <a 