Theorem vn0

Description: The universal class is not equal to the empty set. (Contributed by NM, 11-Sep-2008)

	Ref	Expression
Assertion	vn0	$$⊢\mathrm{V}\ne \varnothing$$

Proof

Step	Hyp	Ref	Expression
1		vex	$$⊢x\in \mathrm{V}$$
2	1	ne0ii	$$⊢\mathrm{V}\ne \varnothing$$