Completions of pro-spaces

Daniel C. Isaksen

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arXiv · math/0404303

Completions of pro-spaces

Daniel C. Isaksen

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Abstract

For every ring R, we present a pair of model structures on the category of pro-spaces. In the first, the weak equivalences are detected by cohomology with coefficients in R. In the second, the weak equivalences are detected by cohomology with coefficients in all R-modules (or equivalently by pro-homology with coefficients in R). In the second model structure, fibrant replacement is essentially just the Bousfield-Kan R-tower. When R = Z/p, the first homotopy category is equivalent to a homotopy theory defined by Morel but has some convenient categorical advantages.

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Daniel C. Isaksen. 2004-04-16. Completions of pro-spaces. https://arxiv.org/abs/math/0404303

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