Semi (1, 2)*-Maximal Soft (1, 2)*-Pre-Open Sets and Semi (1, 2)*-Minimal Soft (1, 2)*-Pre-Closed Sets In Soft Bitopological Spaces

In this paper, we introduce and study new types of soft open sets and soft closed sets in soft bitopological spaces (X,Ταυbar 1, Ταυbar 2,E), namely, (1,2)*-maximal soft open sets, (1,2)*-maximal soft (1,2)*-pre-open sets, semi (1,2)*-maximal soft (1,2)*-preopen sets, (1,2)*-maximal soft closed sets, (1,2)*-maximal soft (1,2)*-pre-closed sets, (1,2)*-minimal soft open sets, (1,2)*-minimal soft (1,2)*-pre-open sets, (1,2)*- minimal soft closed sets, (1,2)*-minimal soft (1,2)*-pre-closed sets, and semi (1,2)*- minimal soft (1,2)*-pre-closed sets. Also, properties and the relation among these concepts have been studied.