span class="bold"><strong>Mergable</strong></span>: While all heaps can be merged,
          some can be merged efficiently.
        </li>
<li class="listitem">
          <span class="bold"><strong>Stability</strong></span>: Heaps can be configured to
          be stable sorted.
        </li>
<li class="listitem">
          <span class="bold"><strong>Comparison</strong></span>: Heaps can be compared for
          equivalence.
        </li>
</ul></div>
</div>
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~g