Rough picture fuzzy set and picture fuzzy topologies
Nguyễn Xuân Thảo, Nguyễn Văn Định · Journal of Computer Science and Cybernetics · 2015
Approximation of a picture fuzzy set on a crisp approximation space gives a rough picture fuzzy set. In this paper, the concept of a rough picture set is introduced, besides, we also investigate some topological structures of a rough picture fuzzy set are investigated, such are lower and upper rough picture fuzzy approximation operators.