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math.DS2021★ 1 cited
Sofically presented dynamical systems
Johan Kopra, Ville Salo
Systems obtained by quotienting a subshift of finite type (SFT) by another SFT are called finitely presented in the literature. Analogously, if a sofic shift is quotiented by a sof…
math.DS2021
Direct Prime Subshifts and Canonical Covers
Johan Kopra
We present a new sufficient criterion to prove that a non-sofic half-synchronized subshift is direct prime. The criterion is based on conjugacy invariant properties of Fischer grap…