A Bass--Serre theoretic proof of a theorem of Burns and Romanovskii

2021/07/06 by Andrew, Naomi
#20E06 (Primary) 20E08 (Secondary) #FOS: Mathematics #Group Theory (math.GR)

paper · doi:10.48550/arxiv.2107.02548

Abstract

A well known theorem of Burns and Romanovskii 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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