The globally Bi-3*-connected property of the honeycomb rectangular torus

  • Authors:
  • Yuan-Hsiang Teng;Jimmy J. M. Tan;Lih-Hsing Hsu

  • Affiliations:
  • Department of Computer and Information Science, National Chiao Tung University, Hsinchu City, Taiwan 300, ROC;Department of Computer and Information Science, National Chiao Tung University, Hsinchu City, Taiwan 300, ROC;Department of Computer Science and Information Engineering, Providence University, Taichung County, Taiwan 433, ROC

  • Venue:
  • Information Sciences: an International Journal
  • Year:
  • 2007

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Abstract

The honeycomb rectangular torus is an attractive alternative to existing networks such as mesh-connected networks in parallel and distributed applications because of its low network cost and well-structured connectivity. Assume that m and n are positive even integers with n=4. It is known that every honeycomb rectangular torus HReT(m,n) is a 3-regular bipartite graph. We prove that in any HReT(m,n), there exist three internally-disjoint spanning paths joining x and y whenever x and y belong to different partite sets. Moreover, for any pair of vertices x and y in the same partite set, there exists a vertex z in the partite set not containing x and y, such that there exist three internally-disjoint spanning paths of G-{z} joining x and y. Furthermore, for any three vertices x, y, and z of the same partite set there exist three internally-disjoint spanning paths of G-{z} joining x and y if and only if n=6 or m=2.