Conditional fault tolerance in a class of Cayley graphs

Let G be a hierarchical network (graph) with vertex set and edge set . The preclusion set of a subnetwork (defined as a smaller network but with the same topological properties as the original one) in G is a subset of such that has no subnetwork . The preclusion number of in G is . Similarly, the edge preclusion set of in G is a subset of such that has no subnetwork . The edge preclusion number of in G is . The preclusion number and edge preclusion number are parameters which measure the robustness of interconnection networks in the event of failures. In this paper, we investigate a class of graphs which are constructed by combining the star graph with the bubble-sort graph, and give some preclusion numbers and edge preclusion numbers for this class of graphs.

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