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<p><b>Abstract</b>—Vadapalli and Srimani [<ref rid="bibl12992" type="bib">2</ref>] have proposed a new family of Cayley graph interconnection networks of constant degree four. Our comments show that their proposed graph is not new but is the same as the wrap-around butterfly graph. The structural kinship of the proposed graph with the de Bruijn graph is also discussed.</p>
Interconnection network, Cayley graph, generator, de Bruijn graph, butterfly graph, isomorphism.

G. Chen and F. C. Lau, "Comments on "A New Family of Cayley Graph Interconnection Networks of Constant Degree Four"," in IEEE Transactions on Parallel & Distributed Systems, vol. 8, no. , pp. 1299-1300, 1997.
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