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Description: 4 is a positive real. (Contributed by SN, 26-Aug-2025)
| Ref | Expression | ||
|---|---|---|---|
| Assertion | 4rp | ⊢ 4 ∈ ℝ+ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 4re | ⊢ 4 ∈ ℝ | |
| 2 | 4pos | ⊢ 0 < 4 | |
| 3 | 1 2 | elrpii | ⊢ 4 ∈ ℝ+ |