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arXiv · 1701.04441

A Magnus theorem for some amalgamated products

Carsten Feldkamp
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Abstract

A group $G$ possesses the Magnus property if for every two elements $u,v \in G$ with the same normal closure, $u$ is conjugate in $G$ to $v$ or $v^{-1}$. We prove the Magnus property for some amalgamated products including the fundamental group of a closed non-orientable surface of genus 3. This answers a question of O. Bogopolski and K. Sviridov, who obtained the analogous result for genus $g > 3$.

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Carsten Feldkamp. 2017-01-16. A Magnus theorem for some amalgamated products. https://arxiv.org/abs/1701.04441

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