A note on the nuclear dimension of Cuntz-Pimsner $C^{\ast }$-algebras associated with minimal shift spaces

Abstract

For every one-sided shift space $X$ over a finite alphabet, left special elements are those points in $X$ having at least two preimages under the shift operation. In this paper, we show that the Cuntz-Pimsner $C^{\ast }$-algebra ${\mathcal{O}}_X$ has nuclear dimension 1 when $X$ is minimal and the number of left special elements in $X$ is finite. This is done by describing thoroughly the cover of $X$ which also recovers an exact sequence, discovered before by T. Carlsen and S. Eilers.

21 pages, final version, accepted by Canad. J. Math