Coarse Hurewicz map

Let (X,d)(X,d) be a proper metric space and let nN0n\in\mathbb{N}_0. Let HX(X)H\mathcal{X}_*(X) denote coarse homology. Coarse Hurewicz conjecture. There is a natural morphism

H:πnc(X)HXn+1(X)\mathcal{H}:\pi_n^c(X)\to H\mathcal{X}_{n+1}(X)

that makes the diagram comparing coarse homotopy with the colimit of end homotopy groups of the covers Uh|\mathcal{U}_h| commute. This would construct a coarse analogue of the ordinary Hurewicz map.

Sources & referencesView supporting material

Primary source

Felix Lange, “Coarse Homotopy Theory and Shape Theory”, arXiv:2606.14212 (2026).

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