Displaying similar documents to “Čech extensions and localization of homotopy functors”

Modulo C homotopy

J. R. Dennett (1982)

Cahiers de Topologie et Géométrie Différentielle Catégoriques

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Heaps and unpointed stable homotopy theory

Lukáš Vokřínek (2014)

Archivum Mathematicum

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In this paper, we show how certain “stability phenomena” in unpointed model categories provide the sets of homotopy classes with a canonical structure of an abelian heap, i.e. an abelian group without a choice of a zero. In contrast with the classical situation of stable (pointed) model categories, these sets can be empty.