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 e. A |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | vprc | |- -. _V e. _V |
|
| 2 | elex | |- ( _V e. A -> _V e. _V ) |
|
| 3 | 1 2 | mto | |- -. _V e. A |