/a> and 
two returning <a href="ug_query_lb.html#Geometry-based Functions">coordinate 
information</a>.

<p>
We group <a href="ug_alg_reftree.html">refinement-tree partitioning</a>
for adaptive mesh refinement applications
into the geometric partitioners because
it uses geometric information to determine an initial ordering for coarse
elements of adaptively refined meshes.  The refinement-tree partitioner
also requires <a href="ug_query_lb.html#Tree-based Functions">tree-based 
callbacks</a> with connectivi