struct PK_TOPOL_fctab_fin_vertex_s
        {
        int  *vertex;
        int   length;
        };
 typedef struct PK_TOPOL_fctab_fin_vertex_s
                PK_TOPOL_fctab_fin_vertex_t;


This is a support structure for PK_TOPOL_facet_r_t. It represents a
one column table which maps fin indices into 'head' vertex indices.