HACETTEPE JOURNAL OF MATHEMATICS AND STATISTICS, vol.52, no.1, pp.163-170, 2023 (SCI-Expanded)
The aim of this paper is to introduce semitopological d-group and topological d-group with the concept of d-group which arise from approximately algebraic structures. Furthermore, it is shown that product space determined with d-topological subspaces is a d-topological space. Fundamental system of open d-neighborhoods and related properties were investi-gated.