Description: Omega is an ordinal number. (Contributed by NM, 10-May-1998) (Revised by Mario Carneiro, 30-Jan-2013)
Ref | Expression | ||
---|---|---|---|
Assertion | omelon | |- _om e. On |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | omex | |- _om e. _V |
|
2 | omelon2 | |- ( _om e. _V -> _om e. On ) |
|
3 | 1 2 | ax-mp | |- _om e. On |