In this paper, we generalized the notions of rough set concepts using two topological structures generated by general binary relation defined on the universe of discourse. New types of topological rough sets are initiated and studied using new types of topological sets. Some properties of topological rough approximations are studied by many propositions. © 2010 King Saud University. All rights reserved.
Salama, A. S., & Abd El-Monsef, M. M. E. (2011). Generalizations of rough set concepts. Journal of King Saud University - Science, 23(1), 17–21. https://doi.org/10.1016/j.jksus.2010.06.001