In this paper we define the chromatic number of a lattice: It is the least number of colors one needs to color the interiors of the cells of the Voronoi tessellation of a lattice so that no two cells sharing a facet are of the same color.

中文翻译：

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为晶格的 Voronoi 镶嵌着色

在本文中，我们定义了格子的色数：它是为格子的 Voronoi 镶嵌的单元格内部着色所需的最少颜色数，这样共享一个面的两个单元格就不会具有相同的颜色。