We introduce notions of interior and closure of a set about a subbase for a topological space, and obtain their basic properties ; In addition, we discuss the relations between rough sets and subsets of a topological space. These results can be considered as fundamental theory of rough sets.
Jin Jin LI. , {{custom_author.name_en}}.
Rough Sets and Subsets of a Topological Space. Systems Engineering - Theory & Practice, 2005, 25(7): 136-140 https://doi.org/10.12011/1000-6788(2005)7-136