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| Mirrors > Home > MPE Home > Th. List > 1rp | Structured version Visualization version GIF version | ||
| Description: 1 is a positive real. (Contributed by Jeff Hankins, 23-Nov-2008.) |
| Ref | Expression |
|---|---|
| 1rp | ⊢ 1 ∈ ℝ+ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 1re 11261 | . 2 ⊢ 1 ∈ ℝ | |
| 2 | 0lt1 11785 | . 2 ⊢ 0 < 1 | |
| 3 | 1, 2 | elrpii 13037 | 1 ⊢ 1 ∈ ℝ+ |
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