Analysis of n-port, (n +p)-terminal, degenerate resistance networks

A degenerate n-port resistance network is one which, as a result of topological constraints, requires an equation to be satisfied among some of the elements of the short-circuit conductance matrix of the network. Biorci and Civalleri have studied and reported results on
(n + 2)
-terminal degenerate resistance networks. In this paper, we point out an error which they made, and give conditions which partially characterize degeneracy in
(n + p)
-terminal networks, for
p
greater than 2, in terms of complementary network graphs that contain complete bipartite subgraphs.