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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.
Timothy Porter (1978)
Cahiers de Topologie et Géométrie Différentielle Catégoriques
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Grandis, Marco (2002)
Theory and Applications of Categories [electronic only]
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S. Balcerzyk, Phan Chan, R. Kiełpiński (1976)
Fundamenta Mathematicae
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Michael A. Mandell (2006)
Publications Mathématiques de l'IHÉS
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Finite type nilpotent spaces are weakly equivalent if and only if their singular cochains are quasi-isomorphic as E algebras. The cochain functor from the homotopy category of finite type nilpotent spaces to the homotopy category of E algebras is faithful but not full.
Thomas Müller (1983)
Cahiers de Topologie et Géométrie Différentielle Catégoriques
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Peter I. Booth (1998)
Cahiers de Topologie et Géométrie Différentielle Catégoriques
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