Theorem nvelOLD

Description: Obsolete proof of nvel , obsolete as of 1-May-2026. (Contributed by FL, 31-Dec-2006) (Proof modification is discouraged.) (New usage is discouraged.)

	Ref	Expression
Assertion	nvelOLD	$$⊢\neg \mathrm{V}\in A$$

Proof

Step	Hyp	Ref	Expression
1		vprc	$$⊢\neg \mathrm{V}\in \mathrm{V}$$
2		elex	$$⊢\mathrm{V}\in A\to \mathrm{V}\in \mathrm{V}$$
3	1 2	mto	$$⊢\neg \mathrm{V}\in A$$