Least periods of k-automatic sequences
Formal Languages and Automata Theory
2012-07-24 v1 Discrete Mathematics
Abstract
Currie and Saari initiated the study of least periods of infinite words, and they showed that every integer n >= 1 is a least period of the Thue-Morse sequence. We generalize this result to show that the characteristic sequence of least periods of a k-automatic sequence is (effectively) k-automatic. Through an implementation of our construction, we confirm the result of Currie and Saari, and we obtain similar results for the period-doubling sequence, the Rudin-Shapiro sequence, and the paperfolding sequence.
Keywords
Cite
@article{arxiv.1207.5450,
title = {Least periods of k-automatic sequences},
author = {Daniel Goc and Jeffrey Shallit},
journal= {arXiv preprint arXiv:1207.5450},
year = {2012}
}