On Λb-sets and the associated topologyτΛb

Author: Caldas Miguel   Jafari Salid   Noiri Takashi  

Publisher: Springer Publishing Company

ISSN: 0236-5294

Source: Acta Mathematica Hungarica, Vol.110, Iss.4, 2006-03, pp. : 337-345

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Abstract

We define the concept of Λb-sets (resp. Vb-sets) of a topological space, i.e., the intersection of b-open (resp. the union of b-closed) sets. We study the fundamental property of Λb-sets (resp. Vb-sets) and investigate the topologies defined by these families of sets.