 href="merge.c#mark_dupridges">qh_mark_dupridges</a>
add duplicated ridges to qh.facet_mergeset</li>
<li><a href="merge.c#maydropneighbor">qh_maydropneighbor</a>
drop neighbor relationship if no ridge between
facet and neighbor </li>
<li><a href="merge.c#test_appendmerge">qh_test_appendmerge</a>
test a pair of facets for convexity and append to
qh.facet_mergeset if non-convex </li>
<li><a href="merge.c#test_vneighbors">qh_test_vneighbors</a>
test vertex neighbors for convexity </li>
</ul>

<h3><a href="qh-m