Uniform coloring
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| 111 | 112 | 123 |
|---|---|---|
| The hexagonal tiling has 3 uniform colorings. |
In geometry, a uniform coloring is a property of a uniform figure (uniform tiling or uniform polyhedron) that is colored to be vertex-transitive. Different symmetries can be expressed on the same geometric figure with the faces following different uniform color patterns.
A uniform coloring can be specified by listing the different colors with indices around a vertex figure.
n-uniform figures
In addition, an n-uniform coloring is a property of a uniform figure which has n types vertex figure, that are collectively vertex transitive.
Archimedean coloring
A related term is Archimedean color requires one vertex figure coloring repeated in a periodic arrangement. A more general term are k-Archimedean colorings which count k distinctly colored vertex figures.
For example, this Archimedean coloring (left) of a triangular tiling has two colors, but requires 4 unique colors by symmetry positions and become a 2-uniform coloring (right):
| 1-Archimedean coloring 111112 | 2-uniform coloring 112344 and 121434 |
- Grünbaum, Branko; Shephard, G. C. (1987). . W. H. Freeman and Company. ISBN0-7167-1193-1. Uniform and Archimedean colorings, pp.102–107