Tight bounds for rumor spreading in graphs of a given conductance

  title={Tight bounds for rumor spreading in graphs of a given conductance},
  author={George Giakkoupis},
We study the connection between the rate at which a rumor spreads throughout a graph and the conductance of the graph—a standard measure of a graph’s expansion properties. We show that for any n-node graph with conductance φ, the classical PUSH-PULL algorithm distributes a rumor to all nodes of the graph in O(φ−1 log n) rounds with high probability. This bound improves a recent result of Chierichetti, Lattanzi, and Panconesi [6], and it is tight in the sense that there exist graphs where Ω(φ−1… CONTINUE READING
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