“…Among many hierarchical networks [2], [3], [5], [8], [11], [14], [18], [19], [20], Generalized Hierarchical Completely-Connected Networks (for short, HCC) [18], [19] are suitable for such systems, because they have a constant node-degree regardless of the increase in size (the number of nodes). The HCC have their characteristics of expansibility, uniformity, and symmetry.…”