REMARKS ON δ-SEMI-OPEN SETS AND δ-PREOPEN SETS
REMARKS ON δ-SEMI-OPEN SETS AND δ-PREOPEN SETS
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关于δ-半开集和δ-预开集的备注
DOI:
10.1515/dema-2003-0424
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发表时间:
2003
期刊:
影响因子:
--
通讯作者:
T. Noiri
中科院分区:
文献类型:
--
作者:
T. Noiri
It is shown that a subset A of a topological space ( X , r ) is ¿-semi-open (resp. 5-preopen) in {X,T) if and only if it is semi-open (resp. preopen) in (X, T3), where TS denotes the semi-regularization of r . By using this fact, we can obtain several new characterizations of s-closed spaces, semi-connected spaces, and some separation axioms.