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Hopfian Groups are Complete co-Analytic

Published 1 Mar 2023 in math.LO | (2303.00839v2)

Abstract: We show the set of Hopfian countable groups is a complete co-analytic subset of the standard Borel space of countable groups, resolving a question posed by Simon Thomas (https://doi.org/10.1007/s00153-017-0597-9).

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Authors (1)

  1. Brian Pinsky 

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