>') to avoid non-simpicial regions.  For the circle-in-square example,
        eight Delaunay regions are triangular and the ninth has four input sites.</dd>
    <dt><a href="qh-optf.html#Fv">Fv</a></dt>
    <dd>list input sites for each Delaunay region.  The first line is the number of regions.
        Each remaining line starts with the number of input sites.  The regions
        are unoriented.  For the circle-in-square example,
        eight Delaunay regions are triangular and the ninth has four input s