td><div class="info">
Tests if an interval is the entire interval
</div>
</td></tr>
<tr><td><a href="Interval2.html#VALis_valid">is_valid</a> [<a href="Interval2.html">Interval2</a>]</td>
<td><div class="info">
Tests if an interval is valid.
</div>
</td></tr>
<tr><td><a href="Interval1.html#VALis_valid">is_valid</a> [<a href="Interval1.html">Interval1</a>]</td>
<td><div class="info">
Tests if an interval is valid.
</div>
</td></tr>
<tr><td align="left"><br>L</td></tr>
<tr><td><a href="Interval2.html#VALlog_