Does the universal set contain itself?

Related questions

1. How do you prove well ordering principle?
2. What are the examples of set?
3. What is an example of a corollary?
4. Is the well ordering principle an axiom?
5. Why is the axiom of choice an axiom?
6. Is Zfc consistent?
7. What is corollary math?
8. Are integers well ordered?
9. What is difference between Lemma and Theorem?
10. What is the difference between induction and strong induction?

Tags

1. #again
2. #theories
3. #classes
4. #object
5. #paradox
6. #comprehension
7. #category
8. #operates
9. #universal
10. #russell
11. #contain
12. #axiom
13. #apply
14. #considered
15. #itself
16. #these
17. #because