Approximating matching size from random streams

  title={Approximating matching size from random streams},
  author={Mikhail Kapralov and Sanjeev Khanna and Madhu Sudan},
We present a streaming algorithm that makes one pass over the edges of an unweighted graph presented in random order, and produces a polylogarithmic approximation to the size of the maximum matching in the graph, while using only polylogarithmic space. Prior to this work the only approximations known were a folklore Õ( √ n) approximation with polylogarithmic space in an n vertex graph and a constant approximation with Ω(n) space. Our work thus gives the first algorithm where both the space and… CONTINUE READING
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