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Extension of maps into nilpotent spaces III

机译:将地图扩展到幂等空间III

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摘要

Let M be a nilpotent CW-complex. We give necessary and sufficient cohomological dimension theory conditions for a finite-dimensional metric compactum X so that every map A → M, where A is a closed subset of X, can be extended to a map X → M. This is a generalization of a result by Dranishnikov [Mat. Sb. (1991)] where such conditions were found for simply-connected CW-complexes M, and Cencelj and Dranishnikov [Canad. Bull. Math. (2001) and Topology Appl. (2002)] where a condition of finitely generatedness was imposed on the nilpotent CW-complex M.
机译:令M为幂等的CW复数。我们为有限维度量紧致X提供了充分必要的同调维理论条件,以便每个图A→M(其中A是X的封闭子集)都可以扩展到图X→M。 Dranishnikov [Mat。某人(1991年)],其中简单连接的CW复合物M和Cencelj和Dranishnikov [Canad。公牛。数学。 (2001)和拓扑应用。 (2002年)],将有限生成的条件强加到无能CW复杂M上。

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