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| Mirrors > Home > MPE Home > Th. List > 2pos | Structured version Visualization version Unicode version | ||
| Description: The number 2 is positive. (Contributed by NM, 27-May-1999.) |
| Ref | Expression |
|---|---|
| 2pos |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 1re 10039 |
. . 3
| |
| 2 | 0lt1 10550 |
. . 3
| |
| 3 | 1, 1, 2, 2 | addgt0ii 10570 |
. 2
|
| 4 | df-2 11079 |
. 2
| |
| 5 | 3, 4 | breqtrri 4680 |
1
|
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