DECOMPOSITION OF (1, 2)*-CONTINUITY AND (1,2)*-α-CONTINUITY.

In this paper, we introduce new types of sets called (1,2)*-D(α,p) sets, (1,2)*-D(α,s) sets, (1,2)*-D(c,α) sets, (1,2)*-D(c,s) sets and (1,2)*-D(c,p) sets and new classes of mappings called (1,2)*-D(α,p) continuous, (1,2)*-D(α,s) continuous, (1,2)*-D(c,α) continuous, (1,2)*-D(c,s) continuous and (1,2)*-D(c,p) continuous mappings. We obtain several characterizations of these classes, study their bitopological properties, and investigate their relation with other bitopological sets and mappings. [ABSTRACT FROM AUTHOR]