Theorem nnex

Description: The set of positive integers exists. (Contributed by NM, 3-Oct-1999) (Revised by Mario Carneiro, 17-Nov-2014)

	Ref	Expression
Assertion	nnex	$$⊢\mathbb{N}\in \mathrm{V}$$

Proof

Step	Hyp	Ref	Expression
1		cnex	$$⊢ℂ\in \mathrm{V}$$
2		nnsscn	$$⊢\mathbb{N}\subseteq ℂ$$
3	1 2	ssexi	$$⊢\mathbb{N}\in \mathrm{V}$$