Navalagi, Govindappa - 2018
In this note we introduce the new concepts like semipre-neighbourhoods(i.e.sp-nbds),semipreinterior (i.e.,sp-interior)point, semipre-limit point(i.e.,sp-limit point), semi prederived (sp-derived)set and semiprefrontier (sp-frontier)of a set using the conecept of semipreopen sets and obtain their...