A Bass-Serre theoretic proof of a theorem of Romanovskii and Burns
A well known theorem of Romanovskii and Burns states that a free product of subgroup separable groups is itself subgroup separable. We provide a proof using the language of immersions and coverings of graphs of groups, due to Bass.
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| Formáid: | Journal article |
| Teanga: | English |
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Taylor & Francis
2022
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