On Testing Expansion in Bounded-Degree Graphs

  title={On Testing Expansion in Bounded-Degree Graphs},
  author={Oded Goldreich and Dana Ron},
  booktitle={Electronic Colloquium on Computational Complexity},
We consider testing graph expansion in the bounded-degree graph model. Specifically, we refer to algorithms for testing whether the graph has a second eigenvalue bounded above by a given threshold or is far from any graph with such (or related) property. We present a natural algorithm aimed towards achieving the foregoing task. The algorithm is given a (normalized) eigenvalue bound λ < 1, oracle access to a bounded-degree N-vertex graph, and two additional parameters ǫ, α > 0. The algorithm… CONTINUE READING
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