This is an inofficial mirror of http://metamath.tirix.org for personal testing of a visualizer extension only.
Description: An atom is greater than zero. (Contributed by NM, 4-Jul-2012)
| Ref | Expression | ||
|---|---|---|---|
| Hypotheses | 0ltat.z | ||
| 0ltat.s | |||
| 0ltat.a | |||
| Assertion | 0ltat |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 0ltat.z | ||
| 2 | 0ltat.s | ||
| 3 | 0ltat.a | ||
| 4 | simpl | ||
| 5 | eqid | ||
| 6 | 5 1 | op0cl | |
| 7 | 6 | adantr | |
| 8 | 5 3 | atbase | |
| 9 | 8 | adantl | |
| 10 | eqid | ||
| 11 | 1 10 3 | atcvr0 | |
| 12 | 5 2 10 | cvrlt | |
| 13 | 4 7 9 11 12 | syl31anc |