e within Zoltan without modification and in any
combination.  Hierachical balancing is invoked by an application the
same way as other Zoltan procedures.  Since Zoltan is data-structure
neutral, it operates on generic "objects" and interfaces with
applications through callback functions.<P>

A hierarchical balancing step begins by building an intermediate
structure using the application-supplied callbacks.  The initial
structure is computed using <B>Zoltan_Build_Graph</B> to build the
same structure that is