erval2.html#VALempty_interval">empty_interval</a> [<a href="Interval2.html">Interval2</a>]</td>
<td><div class="info">
The empty interval
</div>
</td></tr>
<tr><td><a href="Interval1.html#VALempty_interval">empty_interval</a> [<a href="Interval1.html">Interval1</a>]</td>
<td><div class="info">
The empty interval
</div>
</td></tr>
<tr><td><a href="Interval2.html#VALentire_interval">entire_interval</a> [<a href="Interval2.html">Interval2</a>]</td>
<td><div class="info">
The entire interval representing (-infi