ON SN-SPACES
regular open
regular closed
SN-space
semi-continuous
pre-semi open function
so-continuous function
weakly closed function
pre-closed set
Gδ set
nd-preserving function
The aim of this paper is to introduce and study the concept of SN-spaces via the notation of simply-open sets as well as to investigate their relationship to other topological spaces and give some of its properties.