论文标题

具有基于距离的限制的消防

Firefighting with a Distance-Based Restriction

论文作者

Burgess, Andrea, Marcoux, John, Pike, David

论文摘要

在《消防员》游戏的经典版本中,第一次转火在图$ g $中的顶点上爆发,然后$ k $消防员保护$ k $ vertices。在随后的每个回合中,大火蔓延到所有燃烧顶点的集体未燃烧的社区,而消防员再次保护$ k $的顶点。一旦顶点被烧毁或受到保护,游戏的其余部分就可以保持这种状态。关于某些无限图$ g $的共同目标是确定需要多少消防员来阻止火在有限数量的转弯后蔓延,通常称为包含火灾。我们介绍了距离限制消防员的概念,其中消防员的运动受到限制,因此他们只能向上移动到每回合的固定距离$ d $,而不是不受限制地移动。与原始游戏的属性相反,我们建立了这款新游戏的一些一般属性,我们研究了无限广场,强和六角形网格上距离限制游戏的特定案例。我们推测,当$ d = 2 $时,两名消防员在方格上不足,我们在$ d = 1 $时总体上需要多少消防员提出一些疑问。

In the classic version of the game of firefighter, on the first turn a fire breaks out on a vertex in a graph $G$ and then $k$ firefighters protect $k$ vertices. On each subsequent turn, the fire spreads to the collective unburnt neighbourhood of all the burning vertices and the firefighters again protect $k$ vertices. Once a vertex has been burnt or protected it remains that way for the rest of the game. A common objective with respect to some infinite graph $G$ is to determine how many firefighters are necessary to stop the fire from spreading after a finite number of turns, commonly referred to as containing the fire. We introduce the concept of distance-restricted firefighting where the firefighters' movement is restricted so they can only move up to some fixed distance $d$ per turn rather than being able to move without restriction. We establish some general properties of this new game in contrast to properties of the original game, and we investigate specific cases of the distance-restricted game on the infinite square, strong, and hexagonal grids. We conjecture that two firefighters are insufficient on the square grid when $d = 2$, and we pose some questions about how many firefighters are required in general when $d = 1$.

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