Playing to retain the advantage

  • Authors:
  • Noga Alon;Dan Hefetz;Michael Krivelevich

  • Affiliations:
  • Schools of mathematics and computer science, raymond and beverly sackler faculty of exact sciences, tel aviv university, tel aviv, 69978, israel (e-mail: nogaa@tau.ac.il);Institute of theoretical computer science, eth zurich, ch-8092 switzerland (e-mail: dan.hefetz@inf.ethz.ch);School of mathematical sciences, raymond and beverly sackler faculty of exact sciences, tel aviv university, tel aviv, 69978, israel (e-mail: krivelev@post.tau.ac.il)

  • Venue:
  • Combinatorics, Probability and Computing
  • Year:
  • 2010

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Abstract

Let P be a monotone increasing graph property, let G = (V, E) be a graph, and let q be a positive integer. In this paper, we study the (1: q) Maker–Breaker game, played on the edges of G, in which Maker's goal is to build a graph that satisfies the property P. It is clear that in order for Maker to have a chance of winning, G itself must satisfy P. We prove that if G satisfies P in some strong sense, that is, if one has to delete sufficiently many edges from G in order to obtain a graph that does not satisfy P, then Maker has a winning strategy for this game. We also consider a different notion of satisfying some property in a strong sense, which is motivated by a problem of Duffus, Łuczak and Rödl [6].