</span><span class="special">)</span></code>.
          </li>
</ul></div>
<p>
        <span class="bold"><strong>Important:</strong></span> The behavior of this function
        is aligned to that of <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Math.html#ulp%28double%29" target="_top">Java's
        ulp function</a>, please note however that this function should only
        ever be used for rough and ready calculations as there are enough corner
        cases to trap even careful programmers