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 sets theory...”

9 Subjects: “...fuzzy set theory...”

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

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

12 “... described are based on Set Theory. The tableau rule was reduced to an ordered n-tuple of sets of expressions...”

13 “... not presuppose any background in formal logic or set theory....”

14 “... models under uncertainty, proposing hybrid MCDM methods in combination with fuzzy or rough set theory...”

15 “... of different tools from Fuzzy Set Theory and applications in many areas of Business Management and other...”