Graph fibrations, graph isomorphism, and PageRank

  title={Graph fibrations, graph isomorphism, and PageRank},
  author={Paolo Boldi and Violetta Lonati and Massimo Santini and Sebastiano Vigna},
PageRank is a ranking method that assigns scores to web pages using the limit distribution of a random walk on the web graph. A fibration of graphs is a morphism that is a local isomorphism of inneighbourhoods, much in the same way a covering projection is a local isomorphism of neighbourhoods. We show that a deep connection relates fibrations and Markov chains with restart, a particular kind of Markov chains that include the PageRank one as a special case. This fact provides constraints on the… CONTINUE READING
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