Automorphisms of $\mathcal{B}$-free Toeplitz systems
Aurelia Dymek, Stanisław Kasjan, Gerhard Keller · arXiv (Cornell University) · 2021
Let $\mathcal{B}$ be an infinite subset of $\{2,3,\ldots\}$. We present sufficient conditions for the triviality of the automorphism group of minimal $\mathcal{B}$-free subshifts and give a broad class of examples satisfying them, extending [9]. On the other hand we provide an example of a minimal $\mathcal{B}$-free subshift whose automorphism group has elements of arbitrarily large finite order, answering Question 11 in [12].