Sparsification of influence networks

  title={Sparsification of influence networks},
  author={Michael Mathioudakis and Francesco Bonchi and Carlos Castillo and Aristides Gionis and Antti Ukkonen},
We present Spine, an efficient algorithm for finding the "backbone" of an influence network. Given a social graph and a log of past propagations, we build an instance of the independent-cascade model that describes the propagations. We aim at reducing the complexity of that model, while preserving most of its accuracy in describing the data. We show that the problem is inapproximable and we present an optimal, dynamic-programming algorithm, whose search space, albeit exponential, is typically… CONTINUE READING
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