Line Digraph Iterations and the (d, k) Digraph Problem

  • Authors:
  • M. A. Fiol;J. L. A. Yebra;I. A. De Miquel

  • Affiliations:
  • Department of Mathematics, E. T. S. de Ing. de Telecomunicacion, Polytechnic University of Barcelona;-;-

  • Venue:
  • IEEE Transactions on Computers
  • Year:
  • 1984

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Abstract

This paper studies the behavior of the diameter and the average distance between vertices of the line digraph of a given digraph. The results obtained are then applied to the so-called (d, k) digraph problem, that is, to maximize the number of vertices in a digraph of maximum out-degree d and diameter k. By line digraph iterations it is possible to construct digraphs with a number of vertices larg