New streaming algorithms for counting triangles in graphs

  • Authors:
  • Hossein Jowhari;Mohammad Ghodsi

  • Affiliations:
  • Computer Engineering Department, Sharif University of Technology, Tehran, Iran;Computer Engineering Department, Sharif University of Technology, Tehran, Iran

  • Venue:
  • COCOON'05 Proceedings of the 11th annual international conference on Computing and Combinatorics
  • Year:
  • 2005

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Abstract

We present three streaming algorithms that (ε,δ)– approximate the number of triangles in graphs. Similar to the previous algorithms [3], the space usage of presented algorithms are inversely proportional to the number of triangles while, for some families of graphs, the space usage is improved. We also prove a lower bound, based on the number of triangles, which indicates that our first algorithm behaves almost optimally on graphs with constant degrees.