Theorem 2ex

Description: The number 2 is a set. (Contributed by David A. Wheeler, 8-Dec-2018)

	Ref	Expression
Assertion	2ex	⊢ 2 ∈ V

Proof

Step	Hyp	Ref	Expression
1		2cn	⊢ 2 ∈ ℂ
2	1	elexi	⊢ 2 ∈ V