期刊名称：International Journal of Mathematics and Mathematical Sciences
印刷版ISSN：0161-1712
电子版ISSN：1687-0425
出版年度：2000
卷号：23
DOI：10.1155/S0161171200001277
出版社：Hindawi Publishing Corporation
摘要：A new type of cluster sets, called S-cluster sets, of functions
and multifunctions between topological spaces is introduced,
thereby providing a new technique for studying S-closed spaces.
The deliberation includes an explicit expression of S-cluster set
of a function. As an application, characterizations of Hausdorff
and S-closed topological spaces are achieved via such cluster
sets.
