English

Fast embedding of spanning trees in biased Maker-Breaker games

Combinatorics 2010-10-15 v1

Abstract

Given a tree T=(V,E)T=(V,E) on nn vertices, we consider the (1:q)(1 : q) Maker-Breaker tree embedding game Tn{\mathcal T}_n. The board of this game is the edge set of the complete graph on nn vertices. Maker wins Tn{\mathcal T}_n if and only if he is able to claim all edges of a copy of TT. We prove that there exist real numbers α,ϵ>0\alpha, \epsilon > 0 such that, for sufficiently large nn and for every tree TT on nn vertices with maximum degree at most nϵn^{\epsilon}, Maker has a winning strategy for the (1:q)(1 : q) game Tn{\mathcal T}_n, for every qnαq \leq n^{\alpha}. Moreover, we prove that Maker can win this game within n+o(n)n + o(n) moves which is clearly asymptotically optimal.

Keywords

Cite

@article{arxiv.1010.2857,
  title  = {Fast embedding of spanning trees in biased Maker-Breaker games},
  author = {Asaf Ferber and Dan Hefetz and Michael Krivelevich},
  journal= {arXiv preprint arXiv:1010.2857},
  year   = {2010}
}

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20 pages