Weak cofibrations in categories of cofibrant objects.
Kieboom, R.W., Sonck, G., Van der Linden, T., Witbooi, P.J. (2003)
Homology, Homotopy and Applications
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Kieboom, R.W., Sonck, G., Van der Linden, T., Witbooi, P.J. (2003)
Homology, Homotopy and Applications
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Jerome William Hoffman (1996)
Cahiers de Topologie et Géométrie Différentielle Catégoriques
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Timothy Porter (1976)
Cahiers de Topologie et Géométrie Différentielle Catégoriques
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J. G. Cabello, A. R. Garzón (1994)
Extracta Mathematicae
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Murray Heggie (1993)
Cahiers de Topologie et Géométrie Différentielle Catégoriques
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Gaucher, Philippe (2006)
Theory and Applications of Categories [electronic only]
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R. W. Thomason (1980)
Cahiers de Topologie et Géométrie Différentielle Catégoriques
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Jan Spaliński (2003)
Fundamenta Mathematicae
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The fourth axiom of a model category states that given a commutative square of maps, say i: A → B, g: B → Y, f: A → X, and p: X → Y such that gi = pf, if i is a cofibration, p a fibration and either i or p is a weak equivalence, then a lifting (i.e. a map h: B → X such that ph = g and hi = f) exists. We show that for many model categories the two conditions that either i or p above is a weak equivalence can be embedded in an infinite number of conditions which imply the existence of...
J. García-Calcines, P. García-Díaz, S. Rodríguez-Machín (2006)
Open Mathematics
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Taking cylinder objects, as defined in a model category, we consider a cylinder construction in a cofibration category, which provides a reformulation of relative homotopy in the sense of Baues. Although this cylinder is not a functor we show that it verifies a list of properties which are very closed to those of an I-category (or category with a natural cylinder functor). Considering these new properties, we also give an alternative description of Baues’ relative homotopy groupoids. ...
Extremiana Aldana, J.Ignazio, Hernández Paricio, L.Javier, Rivas Rodríguez, M.Teresa (1997)
Theory and Applications of Categories [electronic only]
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