What is basic set theory?

Related questions

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4. What is the application of set theory?
5. What is R 3 matrix?
6. Is an empty set bounded?
7. What does Zfc stand for?
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Tags

1. #determined
2. #basic
3. #completely
4. #theory
5. #exactly
6. #their
7. #relation
8. #elements
9. #characterized
10. #collections
11. #equal
12. #membership
13. #elementhood