In this paper we introduce the concept of $g^{\ast }$-closed sets and investigate some of its properties in the spaces considered by A. D. Alexandroff [1] where only countable unions of open sets are required to be open. We also introduce a new separation axiom called $T_{w}$-axiom in the Alexandroff spaces with the help of $g^{\ast }$-closed sets and investigate some of its consequences.
@article{107878, author = {Pratulananda Das and Md. Mamun Ar Rashid}, title = {$g^\ast $-closed sets and a new separation axiom in Alexandroff spaces}, journal = {Archivum Mathematicum}, volume = {039}, year = {2003}, pages = {299-307}, zbl = {1111.54001}, mrnumber = {2032103}, language = {en}, url = {http://dml.mathdoc.fr/item/107878} }
Das, Pratulananda; Rashid, Md. Mamun Ar. $g^\ast $-closed sets and a new separation axiom in Alexandroff spaces. Archivum Mathematicum, Tome 039 (2003) pp. 299-307. http://gdmltest.u-ga.fr/item/107878/
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