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arXiv 1708.07579math.COcs.AIcs.DM
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小图上的Hamilton Maker-Breaker对策

Hamiltonian Maker-Breaker games on small graphs

University of Novi Sad(诺威萨大学)

Miloš Stojaković, Nikola Trkulja

摘要:

我们看看在一个完整的图$K_n$,其中制造商的目标是要求一个哈密顿圈的边缘集上玩的无偏制造商-断路器哈密尔顿性游戏。首先,我们证明,独立于谁开始,制造商可以赢得游戏的$n = 8$和$n = 9$。然后,我们使用归纳论证来证明,无论谁先开始,Maker都可以赢得游戏,当且仅当$n \geq 8$。这特别肯定地解决了帕帕约安努长期以来的猜测。我们还研究了两个与Hamilton对策相关的标准位置对策。对于哈密尔顿路径博弈,我们证明了Maker可以声明一条哈密尔顿路径当且仅当$n \geq 5$,与谁开始无关.接下来,我们来看看固定哈密顿路径博弈,其中Maker的目标是在两个预定的顶点之间声明一条哈密顿路径。我们证明了如果Maker开始游戏,当且仅当$n \geq 7$时他赢,如果Breaker开始游戏,当且仅当$n \geq 8$时Maker赢。使用这个结果,我们能够提高以前最好的上限上的最小数量的边缘上的图的$n$顶点可以有,知道制造商可以赢得制造商-断路器的汉密尔顿性游戏发挥其边缘。为了解决小(有限)板上的上述游戏的结果,我们设计了有效地搜索游戏树的算法,然后在计算机的帮助下获得我们的结果。

英文摘要:

We look at the unbiased Maker-Breaker Hamiltonicity game played on the edge set of a complete graph $K_n$, where Maker's goal is to claim a Hamiltonian cycle. First, we prove that, independent of who starts, Maker can win the game for $n = 8$ and $n = 9$. Then we use an inductive argument to show that, independent of who starts, Maker can win the game if and only if $n \geq 8$. This, in particular, resolves in the affirmative the long-standing conjecture of Papaioannou. We also study two standard positional games related to Hamiltonicity game. For Hamiltonian Path game, we show that Maker can claim a Hamiltonian path if and only if $n \geq 5$, independent of who starts. Next, we look at Fixed Hamiltonian Path game, where the goal of Maker is to claim a Hamiltonian path between two predetermined vertices. We prove that if Maker starts the game, he wins if and only if $n \geq 7$, and if Breaker starts, Maker wins if and only if $n \geq 8$. Using this result, we are able to improve the previously best upper bound on the smallest number of edges a graph on $n$ vertices can have, knowing that Maker can win the Maker-Breaker Hamiltonicity game played on its edges. To resolve the outcomes of the mentioned games on small (finite) boards, we devise algorithms for efficiently searching game trees and then obtain our results with the help of a computer.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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