International Journal of Mathematics and Mathematical Sciences 
Volume 19 (1996), Issue 1, Pages 67-73
doi:10.1155/S0161171296000117

On locally s-closed spaces

C. K. Basu

Department of Pure Mathematics, University of Calcutta 35, Bailygunge Circular Road, Calcutta 700 019, India

Received 12 October 1992; Revised 23 July 1993

Abstract

In the present paper, the concepts of s-closed sub-spaces, locally s-closed spaces have been introduced and characterized. We have seen that local s-closedness is a semi-regular property; the concept of s-θ-closed mapping has been introduced here and the following important properties are established:-

Let f:XY be an s-θ-closed surjection with s-set (Maio and Noiri [8]) point inverses. Then:

(a) If f is completely continuous (Arya and Gupta [1]) and Y is locally compact T2-space, then, X is locally s-closed.

(b) If f is ν-continuous (Ganguly and Basu [5]) and X is a locally compact T2-space, then, Y is locally s-closed.