Testing Subgraphs in Large Graphs

  • Authors:
  • N. Alon

  • Affiliations:
  • -

  • Venue:
  • FOCS '01 Proceedings of the 42nd IEEE symposium on Foundations of Computer Science
  • Year:
  • 2001

Quantified Score

Hi-index 0.00

Visualization

Abstract

Let H be a fixed graph with h vertices, let G be a graph on n vertices and suppose that at least \varepsilonn2 edges have to be deleted from it to make it H-free. It is known that in this case G contains at least f(\varepsilon, H)nh copies of H. We show that the largest possible function f(\varepsilon, H) is polynomial in \varepsilon if and only if H is bipartite. This implies that there is a one-sided error property tester for checking H-freeness, whose query complexity is polynomial in 1 = \varepsilon, if and only if H is bipartite.