  </p>
            </td>
<td>
              <p>
                1.128379
              </p>
            </td>
<td>
              <p>
                Equivalent to POSIX constant M_2_SQRTPI
              </p>
            </td>
</tr>
<tr>
<td>
              <p>
                one_div_root_two_pi
              </p>
            </td>
<td>
              <p>
                1/√(2π)
              </p>
            </td>
<td>
              <p>
                0.398942
              </p>
            </td>
<td>
  