Super-connected arc-transitive digraphs

  • Authors:
  • Jixiang Meng;Zhao Zhang

  • Affiliations:
  • College of Mathematics and System Sciences, Xinjiang University, Urumqi, Xinjiang, 830046, People's Republic of China;College of Mathematics and System Sciences, Xinjiang University, Urumqi, Xinjiang, 830046, People's Republic of China

  • Venue:
  • Discrete Applied Mathematics
  • Year:
  • 2009

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Abstract

A digraph is said to be super-connected if every minimum vertex cut is the out-neighbor set or in-neighbor set of a vertex. A digraph is said to be reducible, if there are two vertices with the same out-neighbor set or the same in-neighbor set. In this paper, we prove that a strongly connected arc-transitive oriented graph is either reducible or super-connected. Furthermore, if this digraph is also an Abelian Cayley digraph, then it is super-connected.