A closed category of reflexive topological abelian groups
Michael Barr (1977)
Cahiers de Topologie et Géométrie Différentielle Catégoriques
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Michael Barr (1977)
Cahiers de Topologie et Géométrie Différentielle Catégoriques
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Ayache, Ahmed, Echi, Othman (2005)
International Journal of Mathematics and Mathematical Sciences
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Barr, Michael (2006)
Theory and Applications of Categories [electronic only]
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Barr, Michael (1999)
Theory and Applications of Categories [electronic only]
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Hans-Joachim Baues, Teimuraz Pirashvili (2005)
Extracta Mathematicae
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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.
Michael Barr (2000)
Cahiers de Topologie et Géométrie Différentielle Catégoriques
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Hernandez-Paricio, Luis-Javier (1995)
Theory and Applications of Categories [electronic only]
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Gabriele Castellini (1986)
Cahiers de Topologie et Géométrie Différentielle Catégoriques
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Lintz, R.G. (1987)
Portugaliae mathematica
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