Co‐Hopfian virtually free groups and elementary equivalence

@article{Andre2021CoHopfianVF,
  title={Co‐Hopfian virtually free groups and elementary equivalence},
  author={Simon Andr'e},
  journal={Bulletin of the London Mathematical Society},
  year={2021},
  volume={54}
}
  • Simon Andr'e
  • Published 8 December 2021
  • Mathematics
  • Bulletin of the London Mathematical Society
We prove that two co‐Hopfian finitely generated virtually free groups are elementarily equivalent if and only if they are isomorphic. We also prove that co‐Hopfian finitely generated virtually free groups are homogeneous in the sense of model theory. 
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