Abstract
We start with an old problem from number theory whose solution leads to the first example of an infinite cube-free word, thus showing that the word x 3 is avoidable. Then we shall describe all avoidable words.
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Sapir, M.V. (2014). Words that Can Be Avoided. In: Combinatorial Algebra: Syntax and Semantics. Springer Monographs in Mathematics. Springer, Cham. https://doi.org/10.1007/978-3-319-08031-4_2
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