ong></span>: p is a node of a tree.</p>
<p><span class="bold"><strong>Effects</strong></span>: Returns true if p is the header of the tree.</p>
<p><span class="bold"><strong>Complexity</strong></span>: Constant.</p>
<p><span class="bold"><strong>Throws</strong></span>: Nothing. </p>
</li>
</ol></div>
</div>
</div>
</div>
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<td align="right"><div class="copyright-footer">Copyright &#169; 2005 Olaf