How do you prove well ordering principle?

Related questions

1. Are the rationals well ordered?
2. Does null set contain itself?
3. Can a set be an element of itself?
4. What is corollary math?
5. What is an ordering principle?
6. What is well ordered day?
7. What is difference between Lemma and Theorem?
8. What is the difference between a postulate and an axiom?
9. Is the empty set well ordered?
10. Is the well ordering principle an axiom?

Tags

1. #positive
2. #ordering
3. #statement
4. #smallest
5. #principle
6. #every
7. #nonempty
8. #least
9. #integers
10. #ordered
11. #subset
12. #element