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Description: The positive reals form a set. (Contributed by Glauco Siliprandi, 11-Oct-2020)
| Ref | Expression | ||
|---|---|---|---|
| Assertion | rpex | ⊢ ℝ+ ∈ V |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | reex | ⊢ ℝ ∈ V | |
| 2 | rpssre | ⊢ ℝ+ ⊆ ℝ | |
| 3 | 1 2 | ssexi | ⊢ ℝ+ ∈ V |