An Endomorphism of a Finitely Generated Residually Finite Group
Daniel T. Wise
Abstract
Let ϕ:G→ G be an endomorphism of a finitely generated residually finite group. R.~Hirshon asked if there exists~n such that the restriction of ϕ to ϕn(G) is injective. We give an example to show that this is not always the case.
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