On two problems in extension theory

Details On two problems in extension theory On two problems in extension theory

2003-12-12

arxiv.org/abs/math/0312269v1

Mathematics

Geometric Topology

Scientific paper

In this note we introduce the concept of a quasi-finite complex. Next, we show that for a given countable and locally finite CW complex L the following conditions are equivalent: (i) L is quasi-finite. (ii) There exists a [L]-invertible mapping of a metrizable compactum X with e-dim X = [L] onto the Hilbert cube. Finally, we construct an example of a quasi-finite complex L such that its extension type [L] does not contain a finitely dominated complex.

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