We show that the cop number of toroidal graphs is at most 3. This resolves a conjecture by Schroeder from 2001 which is implicit in a question by Andreae from 1986.

中文翻译：

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关于环形图的 cop 数

我们证明环形图的 cop 数最多为 3。这解决了 Schroeder 2001 年的猜想，该猜想隐含在 Andreae 1986 年的问题中。