1 Subjects: “...rough set theory...”

2 Subjects: “...fuzzy set theory...”

3 Subjects: “...descriptive set theory...”

4 Subjects: “...set theory...”

5 Subjects: “...rough set theory...”

6 Subjects: “...toposable set theory...”

7 Subjects: “...rough set theory...”

8 Subjects: “...fuzzy set theory...”

9 Subjects: “...fuzzy sets theory...”

10 Subjects: “...neutrosophic set theory...”

11 Subjects: “...neutrosophic set theory...”