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arxiv: 0807.2932 · v1 · submitted 2008-07-18 · 🧮 math.GR

Codimension one subgroups and boundaries of hyperbolic groups

classification 🧮 math.GR
keywords groupshyperbolicboundarygroupsplittingssubgroupsboundariesbowditch
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We construct hyperbolic groups with the following properties: The boundary of the group has big dimension, it is separated by a Cantor set and the group does not split. This shows that Bowditch's theorem that characterizes splittings of hyperbolic groups over 2-ended groups in terms of the boundary can not be extended to splittings over more complicated subgroups.

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