Title: Another approach to topological descent theory
Authors: Sobral, Manuela 
Issue Date: 1998
Publisher: Centro de Matemática da Universidade de Coimbra
Citation: Pré-Publicações DMUC. 98-11 (1998)
Abstract: In the category Top of topological spaces and continuous functions, we prove that descent morphisms with respect to the class IE of continuous bijections are exactly the descent morphisms, providing a new characterization of the latter in terms of subfibrations IE(X) of the basic fibration given by Top/X which are, essentially, complete lattices. Also effective descent morphisms are characterized in terms of effective morphisms with respect to continuous bijections. For classes IE satisfying suitable conditions, we show that the class of effective descent morphisms coincides with the one of effective IE-descent morphisms.
URI: http://hdl.handle.net/10316/11229
Rights: openAccess
Appears in Collections:FCTUC Matemática - Vários

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