Orthogonal and prereflective subcategories
Jiři Rosický, Walter Tholen (1988)
Cahiers de Topologie et Géométrie Différentielle Catégoriques
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Jiři Rosický, Walter Tholen (1988)
Cahiers de Topologie et Géométrie Différentielle Catégoriques
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Krause, Henning (2001)
Documenta Mathematica
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Hans-Joachim Baues, Teimuraz Pirashvili (2005)
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Square groups are gadgets classifying quadratic endofunctors of the category of groups. Applying such a functor to the Kan simplicial loop group of the 2-dimensional sphere, one obtains a one-connected three-type. We consider the problem of characterization of those three-types X which can be obtained in this way. We solve this problem in some cases, including the case when π(X) is a finitely generated abelian group. The corresponding stable problem is solved completely.
Paré, Robert (1999)
Theory and Applications of Categories [electronic only]
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A. Barkhudaryan, R. El Bashir, V. Trnková (2003)
Cahiers de Topologie et Géométrie Différentielle Catégoriques
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Adámek, J., Trenková, V. (2001)
Theory and Applications of Categories [electronic only]
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Jiří Adámek, Jiří Rosický (1989)
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M. Hebert, J. Adamek, J. Rosický (2001)
Cahiers de Topologie et Géométrie Différentielle Catégoriques
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