ON δ* SETS AND THE GENERATED IDEAL

Abstract

In this paper, the concept of δ* -sets is introduced and the ideal Ω generated by all δ* -sets in a topological space is considered. Some properties of δ* -sets, the ideal Ù and their relations with resolvability, irresolvability, the Volterra property and other ideals are explored. It is shown that Ω is compatible with the topology for any given space, which is an analogue to the Banach Category theorem.