Set-theoretic definition of natural numbers
Set theoreticetic definition of the natural numbers
Consider this a prelimenary draft. I thought this article is called for, but I do not see myself an authority on the subject. -- yish
John von Neumann proposed the folowing definition:
- Define the empty set to be zero.
- Define the successor of n as n ∪ {n}
References
- [What are the Natural Numbers?], Gary McGuire
