Triggering cascades on undirected connected graphs

  • Authors:
  • Ching-Lueh Chang

  • Affiliations:
  • Department of Computer Science and Engineering, Yuan Ze University, Taoyuan, Taiwan

  • Venue:
  • Information Processing Letters
  • Year:
  • 2011

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Abstract

Consider the following cascading process on an undirected connected graph G(V,E). A set S of vertices, called the seeds, are active initially. Thereafter, an inactive vertex is activated when at least a @r fraction of its neighbors is active, where @r@?(0,1]. The cascading process proceeds asynchronously until no more vertices can be activated. This paper proves the existence of at most (22+3)@?@r|V|@? seeds that can activate all vertices at the end.