Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4596018 | Journal of Pure and Applied Algebra | 2015 | 17 Pages |
Abstract
We describe in this paper a connection between bifix codes, symbolic dynamical systems and free groups. This is in the spirit of the connection established previously for the symbolic systems corresponding to Sturmian words. We introduce a class of sets of factors of an infinite word with linear factor complexity containing Sturmian sets and regular interval exchange sets, namely the class of tree sets. We prove as a main result that for a uniformly recurrent tree set S, a finite bifix code X on the alphabet A is S-maximal of S-degree d if and only if it is the basis of a subgroup of index d of the free group on A.
Related Topics
Physical Sciences and Engineering
Mathematics
Algebra and Number Theory
Authors
Valérie Berthé, Clelia De Felice, Francesco Dolce, Julien Leroy, Dominique Perrin, Christophe Reutenauer, Giuseppina Rindone,