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A Coloring Problem for Sturmian and Episturmian Words (1301.5263v1)
Published 22 Jan 2013 in math.CO and cs.DM
Abstract: We consider the following open question in the spirit of Ramsey theory: Given an aperiodic infinite word $w$, does there exist a finite coloring of its factors such that no factorization of $w$ is monochromatic? We show that such a coloring always exists whenever $w$ is a Sturmian word or a standard episturmian word.