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Squares and overlaps in the Thue-Morse sequence and some variants
(EDP Sciences, 2006)
We consider the position and number of occurrences of squares in the Thue-Morse sequence, and show that the corresponding sequences are 2-regular. We also prove that changing any finite but nonzero number of bits in the ...
Words without Near-Repetitions
(Canadian Mathematical Society, 1992-06-01)
We find an infinite word w on four symbols with the following property: Two occurrences of any block in w must be separated by more than the length of the block. That is, in any subword of w of the form xyx, the length of ...