On difference open multisets in M-topological spaces

In this paper, we introduce and study some of the topological properties of oD-mset, o−∆ mset by using the concept of open msets. Also, we present new separation axioms by using the notions of open msets, oD-mset, o−∆ mset, pre-open mset and semi-open mset and study some of its properties.