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Metamath Proof Explorer

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 ⊢ ¬ V ∈ A

Proof

Step Hyp Ref Expression
1 vprc ⊢ ¬ V ∈ V
2 elex ⊢ V ∈ A → V ∈ V
3 1 2 mto ⊢ ¬ V ∈ A