The difficulty of testing for isomorphism against a graph that is given in advance

  • Authors:
  • Eldar Fischer

  • Affiliations:
  • Technion--Israel Institute of Technology, Haifa, Israel

  • Venue:
  • STOC '04 Proceedings of the thirty-sixth annual ACM symposium on Theory of computing
  • Year:
  • 2004

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Abstract

Motivated by a question from [6], we investigate the number of queries required for testing that an input graph G is isomorphic to a graph H that is given in advance. Our main result is that the more "complex" H is, the more queries it takes to test an input graph G for the property of being isomorphic to H. This is provided in terms of an upper bound and a lower bound on the number of queries, giving a relation between this number and a natural measure of the complexity of H.