This is an inofficial mirror of http://metamath.tirix.org for personal testing of a visualizer extension only.
Description: Membership of an integer increased by a nonnegative integer in a half- open integer range. (Contributed by Alexander van der Vekens, 22-Sep-2018)
| Ref | Expression | ||
|---|---|---|---|
| Assertion | zpnn0elfzo1 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | zpnn0elfzo | ||
| 2 | zcn | ||
| 3 | 2 | adantr | |
| 4 | nn0cn | ||
| 5 | 4 | adantl | |
| 6 | 1cnd | ||
| 7 | 3 5 6 | addassd | |
| 8 | 7 | oveq2d | |
| 9 | 1 8 | eleqtrd |