English

Universal acyclic resolutions for finitely generated coefficient groups

General Topology 2007-05-23 v2 Algebraic Topology

Abstract

We prove that for every compactum X and every integer n2n \geq 2 there are a compactum Z of dimn\dim \leq n and a surjective UVn1UV^{n-1}-map r:Z\loXr: Z \lo X having the property that: for every finitely generated abelian group G and every integer k2k \geq 2 such that dimGXkn\dim_G X \leq k \leq n we have dimGZk\dim_G Z \leq k and r is G-acyclic, or equivalently: for every simply connected CW-complex K with finitely generated homotopy groups such that \edimXK\edim X \leq K we have \edimZK\edim Z \leq K and r is K-acyclic. (A space is K-acyclic if every map from the space to K is null-homotopic. A map is K-acyclic if every fiber is K-acyclic.)

Keywords

Cite

@article{arxiv.math/0208149,
  title  = {Universal acyclic resolutions for finitely generated coefficient groups},
  author = {Michael Levin},
  journal= {arXiv preprint arXiv:math/0208149},
  year   = {2007}
}