An Expansion Tester for Bounded Degree Graphs

  • Authors:
  • Satyen Kale;C. Seshadhri

  • Affiliations:
  • skale@yahoo-inc.com;scomand@sandia.gov

  • Venue:
  • SIAM Journal on Computing
  • Year:
  • 2011

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Abstract

We consider the problem of testing graph expansion (either vertex or edge) in the bounded degree model [O. Goldreich and D. Ron, On Testing Expansion in Bounded-Degree Graphs, Technical report TR00-020, ECCC, Potsdam, Germany, 2000]. We give a property tester that takes as input a graph with degree bound $d$, an expansion bound $\alpha$, and a parameter $\varepsilon0$. The tester accepts the graph with high probability if its expansion is more than $\alpha$, and rejects it with high probability if it is $\varepsilon$-far from any graph with expansion $\alpha'$ with degree bound $d$, where $\alpha'0$.