Abstract
We study colorings of a tree induced from isometries of the hyperbolic plane given an ideal tessellation. We show that, for a given tessellation of the hyperbolic plane by ideal polygons, a coloring can be associated with any element of Isom(ℍ2), and the element is a commensurator ofΓif and only if its associated coloring is periodic, generalizing a result of Hedlund and Morse.
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