Super-connected and hyper-connected jump graphs

  • Authors:
  • Baoyindureng Wu;Xiaoping Liu;Xiaofeng Guo

  • Affiliations:
  • School of Mathematics and System Sciences, Xinjiang University, Urumqi, Peoples' Republic of China;Xinjiang Polytechnical College, Urumqi, Peoples' Republic of China;Department of Mathematics, Xiamen University, Xiamen, Peoples' Republic of China

  • Venue:
  • International Journal of Computer Mathematics
  • Year:
  • 2008

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Abstract

Let G be a connected graph. The graph G is said to be super-connected if for every minimum vertex cut S of G, G-S has isolated vertices. Moreover, it is said to be hyper-connected if for every minimum vertex cut S, G-S has exactly two components, one of which is an isolated vertex. In this note, we give a necessary and sufficient condition for a graph G whose jump graph J(G) (the complement of line graph of G) is, respectively, super-connected and hyper-connected.