Asynchronous rumor spreading in preferential attachment graphs

  • Authors:
  • Benjamin Doerr;Mahmoud Fouz;Tobias Friedrich

  • Affiliations:
  • Max-Planck-Institut für Informatik, Saarbrücken, Germany;Universität des Saarlandes, Saarbrücken, Germany;Max-Planck-Institut für Informatik, Saarbrücken, Germany,Universität des Saarlandes, Saarbrücken, Germany

  • Venue:
  • SWAT'12 Proceedings of the 13th Scandinavian conference on Algorithm Theory
  • Year:
  • 2012

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Abstract

We show that the asynchronous push-pull protocol spreads rumors in preferential attachment graphs (as defined by Barabási and Albert) in time $O(\sqrt{\log n})$ to all but a lower order fraction of the nodes with high probability. This is significantly faster than what synchronized protocols can achieve; an obvious lower bound for these is the average distance, which is known to be Θ(logn/loglogn).