On the k-tuple domination of generalized de Brujin and Kautz digraphs

  • Authors:
  • Lingye Wu;Erfang Shan;Zengrong Liu

  • Affiliations:
  • Department of Mathematics, Shanghai University, Shanghai 200444, PR China;Department of Mathematics, Shanghai University, Shanghai 200444, PR China;Department of Mathematics, Shanghai University, Shanghai 200444, PR China

  • Venue:
  • Information Sciences: an International Journal
  • Year:
  • 2010

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Abstract

A vertex u in a digraph G=(V,A) is said to dominate itself and vertices v such that (u,v)@?A. For a positive integer k, a k-tuple dominating set of G is a subset D of vertices such that every vertex in G is dominated by at least k vertices in D. The k-tuple domination number of G is the minimum cardinality of a k-tuple dominating set of G. This paper deals with the k-tuple domination problem on generalized de Bruijn and Kautz digraphs. We establish bounds on the k-tuple domination number for the generalized de Bruijn and Kautz digraphs and we obtain some conditions for the k-tuple domination number attaining the bounds.