Scale free interval graphs

  • Authors:
  • Naoto Miyoshi;Takeya Shigezumi;Ryuhei Uehara;Osamu Watanabe

  • Affiliations:
  • Department of Mathematical and Computing Sciences, Tokyo Institute of Technology, Japan;Department of Mathematical and Computing Sciences, Tokyo Institute of Technology, Japan;School of Information Science, JAIST, Japan;Department of Mathematical and Computing Sciences, Tokyo Institute of Technology, Japan

  • Venue:
  • Theoretical Computer Science
  • Year:
  • 2009

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Abstract

Scale free graphs have attracted attention by their non-uniform structure that can be used as a model for various social and physical networks. In this paper, we propose a natural and simple random model for generating scale free interval graphs. The model generates a set of intervals randomly under a certain distribution, which defines a random interval graph. The main advantage of the model is its simpleness. The structure/properties of generated graphs are analyzable by relatively simple probabilistic and/or combinatorial arguments, which is different from many other models. Based on such arguments, we show for our random interval graph that its degree distribution follows a power law, and that it has a large average clustering coefficient.