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Right-angled Coxeter groups with non-planar boundary (1902.01029v1)
Published 4 Feb 2019 in math.GT and math.GR
Abstract: We investigate the planarity of the boundaries of right-angled Coxeter groups. We show that non-planarity of the defining graph does not necessarily imply non-planarity of every boundary of the associated right-angled Coxeter group, although it does in many cases. Our techniques yield a characterization of the triangle-free defining graphs such that the associated right-angled Coxeter group has boundary a Menger curve.