“…When the number of faults is the smallest degree, a new concept of connectivity is necessary, since the graph may become disconnected. Thus several types of superconnectivity were introduced and examined for various classes of graphs in [4,7,9,11,12,16,20], including superconnectedness and tightly superconnectedness, where only singletons can appear in the remaining network, and restricted connectivity, where each remaining component must have a certain minimum size.…”