Please use this identifier to cite or link to this item: http://hdl.handle.net/10316/11341
Title: On point-finiteness in pointfree topology
Authors: Ferreira, Maria João 
Picado, Jorge 
Keywords: Frame; Locale; Sublocale lattice; Congruence lattice; Cover; Interiorpreserving cover; Closure-preserving cover; Closure-preserving cover; Point-finite cover; Locally finite cover
Issue Date: 2006
Publisher: Centro de Matemática da Universidade de Coimbra
Citation: Pré-Publicações DMUC. 06-30 (2006)
Abstract: In pointfree topology, the point-finite covers introduced by Dowker and Strauss do not behave similarly to their classical counterparts with respect to transitive quasi-uniformities, contrarily to what happens with other familiar types of interior-preserving covers. The purpose of this paper is to remedy this by modifying the definition of Dowker and Strauss. We present arguments to justify that this modification turns out to be the right pointfree definition of point-finiteness. Along the way we place point-finite covers among the classes of interior-preserving and closure-preserving families of covers that are relevant for the theory of (transitive) quasi-uniformities, completing the study initiated with [6].
URI: http://hdl.handle.net/10316/11341
Rights: openAccess
Appears in Collections:FCTUC Matemática - Vários

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