Between A-and B-sets *

  title={Between A-and B-sets *},
  author={Julian Dontchev},
  • Julian Dontchev
  • Published 1998
The aim of this paper is to introduce the class of AB-sets as the sets that are the intersection of an open and a semi-regular set. Several classes of well-known topological spaces are characterized via the new concept. A new decomposition of continuity is provided.