Cantor-Bendixson ranks of countable SFTs

03/02/2018

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by   Ilkka Törmä, et al.

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We show that the possible Cantor-Bendixson ranks of countable SFTs are exactly the finite ordinals and ordinals of the form λ + 3, where λ is a computable ordinal. This result was claimed by the author in his PhD dissertation, but the proof contains an error, which is fixed in this note.