Theorem pnfex

Description: Plus infinity exists. (Contributed by David A. Wheeler, 8-Dec-2018) (Revised by Steven Nguyen, 7-Dec-2022)

	Ref	Expression
Assertion	pnfex	⊢ +∞ ∈ V

Proof

Step	Hyp	Ref	Expression
1		df-pnf	⊢ +∞ = 𝒫 ∪ ℂ
2		cnex	⊢ ℂ ∈ V
3	2	uniex	⊢ ∪ ℂ ∈ V
4	3	pwex	⊢ 𝒫 ∪ ℂ ∈ V
5	1 4	eqeltri	⊢ +∞ ∈ V