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Quasi-Sturmian colorings on regular trees

Published online by Cambridge University Press:  09 August 2019

DONG HAN KIM
Affiliation:
Department of Mathematics Education, Dongguk University–Seoul, 30 Pildong-ro 1-gil, Junggu, Seoul04620, Korea email kim2010@dongguk.edu
SEUL BEE LEE
Affiliation:
Department of Mathematical Sciences, Seoul National University, Kwanak-ro 1, Kwanak-gu, Seoul08826, Korea email seulbee.lee@snu.ac.kr, deokwon.sim@snu.ac.kr
SEONHEE LIM
Affiliation:
Department of Mathematical Sciences and Research Institute of Mathematics, Seoul National University, Kwanak-ro 1, Kwanak-gu, Seoul08826, Korea email seonhee.lim@gmail.com
DEOKWON SIM
Affiliation:
Department of Mathematical Sciences, Seoul National University, Kwanak-ro 1, Kwanak-gu, Seoul08826, Korea email seulbee.lee@snu.ac.kr, deokwon.sim@snu.ac.kr

Abstract

Quasi-Sturmian words, which are infinite words with factor complexity eventually $n+c$ share many properties with Sturmian words. In this article, we study the quasi-Sturmian colorings on regular trees. There are two different types, bounded and unbounded, of quasi-Sturmian colorings. We obtain an induction algorithm similar to Sturmian colorings. We distinguish them by the recurrence function.

Type
Original Article
Copyright
© Cambridge University Press, 2019

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