The main purpose of this paper is to introduce and study new classes of soft
closed sets like soft regular generalized b-closed sets in soft topological spaces (brie
y soft
rgb-closed set) Moreover, soft rg-closed, soft gpr-closed, soft gb-closed, soft gsp-closed, soft
g-closed, soft gb-closed, and soft sgb-closed sets in soft topological spaces are introduced in
this paper and we investigate the relations between soft rgb-closed set and the associated soft
sets. Also, the concept of soft semi-regularization of soft topology is introduced and studied
their some properties. We introduce these concepts which are dened over an initial universe
with a xed set of parameters.