This is an inofficial mirror of http://metamath.tirix.org for personal testing of a visualizer extension only.
Description: 0 less than or equal to positive infinity. (Contributed by David A. Wheeler, 8-Dec-2018)
| Ref | Expression | ||
|---|---|---|---|
| Assertion | 0lepnf |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 0xr | ||
| 2 | pnfge | ||
| 3 | 1 2 | ax-mp |