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math.NT2023★ 1 cited
An elementary proof of Bridy's theorem
Eric Rowland, Manon Stipulanti, Reem Yassawi
Christol's theorem states that a power series with coefficients in a finite field is algebraic if and only if its coefficient sequence is automatic. A natural question is how the s…
math.DS2023
Almost automorphic and bijective factors of substitution shifts
Alvaro Bustos-Gajardo, Johannes Kellendonk, Reem Yassawi
In this article we completely characterise constant length substitution shifts which have an almost automorphic factor, or which have a bijective substitution factor. Our approach…