Dimension of locally and asymptotically self-similar spaces

Details Dimension of locally and asymptotically self-similar spaces Dimension of locally and asymptotically self-similar spaces

2005-09-19

arxiv.org/abs/math/0509433v2

St. Petersburg Math. J. 19 (2008), no. 1, 45--65.

Mathematics

Geometric Topology

29 pages; this is an essentially extended and improved version of our paper `Capacity dimension of locally self-similar spaces

Scientific paper

We obtain two in a sense dual to each other results: First, that the capacity dimension of every compact, locally self-similar metric space coincides with the topological dimension, and second, that the asymptotic dimension of a metric space, which is asymptotically similar to its compact subspace coincides with the topological dimension of the subspace. As an application of the first result, we prove the Gromov conjecture that the asymptotic dimension of every hyperbolic group G equals the topological dimension of its boundary at infinity plus 1, asdim G=dim(dG)+1. As an application of the second result, we construct Pontryagin surfaces for the asymptotic dimension, in particular, those are first examples of metric spaces X, Y with asdim(X x Y)

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