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Cannon-Thurston maps, subgroup distortio...
Baker, Owen...
Cannon-Thurston maps, subgroup distortion, and hyperbolic hydra by Baker, Owen ( Author )
Australian National University
21-08-2023
There is a family of hyperbolic groups known as hyperbolic hydra which contain heavily distorted free subgroups. We prove the existence of Cannon--Thurston maps (that is, maps of the boundaries induced by subgroup inclusion) for these free subgroups. It is known that Cannon--Thurston maps between hyperbolic space boundaries can exist even in the presence of arbitrarily heavy (even non-recursive) distortion. The hyperbolic hydra examples show that Cannon--Thurston maps can exist even between hyperbolic group boundaries in the presence of arbitrarily heavy primitive recursive distortion.
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Article
pdf
29.34 KB
English
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MYR 0.01
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http://arxiv.org/abs/1209.0815
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