d>
              <p>
                2.71828
              </p>
            </td>
<td>
              <p>
                <a href="http://en.wikipedia.org/wiki/E_(mathematical_constant)" target="_top">Euler's
                constant e</a>, equivalent to POSIX constant M_E
              </p>
            </td>
</tr>
<tr>
<td>
              <p>
                exp_minus_half
              </p>
            </td>
<td>
              <p>
                e <sup>-1/2</sup>
              </p>
            </td>
<td>
 