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Tree universality in positional games

Published online by Cambridge University Press:  13 December 2024

Grzegorz Adamski
Affiliation:
Department of Discrete Mathematics, Faculty of Mathematics and CS, Adam Mickiewicz University, Poznań, Poland
Sylwia Antoniuk
Affiliation:
Department of Discrete Mathematics, Faculty of Mathematics and CS, Adam Mickiewicz University, Poznań, Poland
Małgorzata Bednarska-Bzdȩga
Affiliation:
Department of Discrete Mathematics, Faculty of Mathematics and CS, Adam Mickiewicz University, Poznań, Poland
Dennis Clemens
Affiliation:
Institute of Mathematics, Hamburg University of Technology, Hamburg, Germany
Fabian Hamann
Affiliation:
Institute of Mathematics, Hamburg University of Technology, Hamburg, Germany
Yannick Mogge*
Affiliation:
Institute of Mathematics, Hamburg University of Technology, Hamburg, Germany
*
Corresponding author: Yannick Mogge; Email: yannick.mogge@tuhh.de

Abstract

In this paper we consider positional games where the winning sets are edge sets of tree-universal graphs. Specifically, we show that in the unbiased Maker-Breaker game on the edges of the complete graph $K_n$, Maker has a strategy to claim a graph which contains copies of all spanning trees with maximum degree at most $cn/\log (n)$, for a suitable constant $c$ and $n$ being large enough. We also prove an analogous result for Waiter-Client games. Both of our results show that the building player can play at least as good as suggested by the random graph intuition. Moreover, they improve on a special case of earlier results by Johannsen, Krivelevich, and Samotij as well as Han and Yang for Maker-Breaker games.

Information

Type
Paper
Copyright
© The Author(s), 2024. Published by Cambridge University Press

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