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Journal Articles Discrete Applied Mathematics Year : 2021

A note on deterministic zombies


Zombies and Survivor is a variant of the well-studied game of Cops and Robbers where the zombies (cops) can only move closer to the survivor (robber). We consider the deterministic version of the game where a zombie can choose their path if multiple options are available. Similar to the cop number, the zombie number of a graph is the minimum number of zombies required to capture the survivor. In this short note, we solve a question by Fitzpatrick et al., proving that the zombie number of the Cartesian product of two graphs is at most the sum of their zombie numbers. We also give a simple graph family with cop number 2 and an arbitrarily large zombie number.
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lirmm-03473184 , version 1 (13-06-2023)




Bartier Valentin, Laurine Bénéteau, Marthe Bonamy, Xuan Hoang La, Jonathan Narboni. A note on deterministic zombies. Discrete Applied Mathematics, 2021, 301, pp.65-68. ⟨10.1016/j.dam.2021.05.001⟩. ⟨lirmm-03473184⟩
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