1. Subversion analyses of hierarchical networks based on (edge) neighbor connectivity.
- Author
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Gu, Mei-Mei, Pai, Kung-Jui, and Chang, Jou-Ming
- Subjects
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CAYLEY graphs , *FAMILIES , *NEIGHBORS , *MULTIPROCESSORS , *GRAPH connectivity , *HYPERCUBES - Abstract
The notion of neighbor connectivity was derived from the assessment of subversion in spy networks caused by the underground resistance movement. For a network G , the neighbor connectivity κ N B (G) (resp. edge neighbor connectivity λ N B (G)) is defined as the least number of vertices (resp. edges) such that if we remove the closed neighborhoods of them, the network will become disconnected, empty, or complete (resp. trivial). The two connectivities can also provide more accurate measures regarding the reliability and fault-tolerance of networks. Star graphs S n and hypercubes Q n are the two most famous structures in the family of Cayley graphs. They are widely studied in the research of developing multiprocessor systems. In this paper, we investigate the neighbor connectivity and edge neighbor connectivity of two kinds of hierarchical networks, called hierarchical star network H S n and complete cubic network C C n , which take S n and Q n as building blocks, respectively. Specifically, we obtain the following results: κ N B (H S n) = n − 1 and λ N B (H S n) = n for n ≥ 3 , and κ N B (C C n) = ⌈ n 2 ⌉ + 1 and λ N B (C C n) = n + 1 for n ≥ 2. In addition, to further determine the distribution of the number of subverted vertices and their occurrence status, we also carry out experiments to simulate the subversion at the vertices on these networks. • This research studies the subversion analyses of hierarchical networks based on (edge) neighbor connectivity. • The neighbor connectivity of hierarchical star network H S n is κ N B (H S n) = n − 1 for n ≥ 3. • The edge neighbor connectivity of hierarchical star network H S n i s λ N B (H S n) = n for n ≥ 3. • The neighbor connectivity of complete cubic network C C n is κ N B (C C n) = [ n 2 ] + 1 for n ≥ 2. • The edge neighbor connectivity of complete cubic network C C n is λ N B (C C n) = n + 1 for n ≥ 2. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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