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arxiv: 1307.3663 · v1 · pith:5VKPADSRnew · submitted 2013-07-13 · 🧮 math.GT

On the dimension of Z-sets

classification 🧮 math.GT
keywords dimensionproofbestvinaboundariescohomologicaldimadimyelementary
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We offer a short and elementary proof that, for a Z-set A in a finite-dimensional ANR Y, dimA<dimY. This result is relevant to the study of group boundaries. The original proof by Bestvina and Mess relied on cohomological dimension theory.

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