What is elementary set theory?

Related questions

1. What are the applications of set theory?
2. What is an empty set example?
3. Who is the No 1 mathematician of the world?
4. What is set theory with examples?
5. What is R 3 matrix?
6. Who proved infinity?
7. What is the application of sets?
8. What is basic set theory?
9. Does the barber shave himself?
10. How is set theory used in business?

Tags

1. #collection
2. #mathematics
3. #considered
4. #objects
5. #whole
6. #called
7. #elements
8. #theory
9. #things
10. #distinct
11. #elementary
12. #members