Theorem zex

Description: The set of integers exists. See also zexALT . (Contributed by NM, 30-Jul-2004) (Revised by Mario Carneiro, 17-Nov-2014)

	Ref	Expression
Assertion	zex	$$⊢\mathbb{Z}\in \mathrm{V}$$

Proof

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