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Residually finite tubular groups

Published online by Cambridge University Press:  27 August 2019

Nima Hoda
Instytut Matematyczny, Uniwersytet Wrocławski pl., Grunwaldzki 2/4, 50–384 Wrocław, Poland (
Daniel T. Wise
Department of Mathematics & Statistics, McGill University Montreal, QC, Canada H3A0B9 (
Daniel J. Woodhouse
Department of Mathematics, Technion Haifa 32000, Israel (


A tubular group G is a finite graph of groups with ℤ2 vertex groups and ℤ edge groups. We characterize residually finite tubular groups: G is residually finite if and only if its edge groups are separable. Methods are provided to determine if G is residually finite. When G has a single vertex group an algorithm is given to determine residual finiteness.

Research Article
Copyright © 2019 The Royal Society of Edinburgh

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