This is an inofficial mirror of http://metamath.tirix.org for personal testing of a visualizer extension only.
Description: The real numbers form a set. See also reexALT . (Contributed by Mario Carneiro, 17-Nov-2014)
| Ref | Expression | ||
|---|---|---|---|
| Assertion | reex | ⊢ ℝ ∈ V |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | cnex | ⊢ ℂ ∈ V | |
| 2 | ax-resscn | ⊢ ℝ ⊆ ℂ | |
| 3 | 1 2 | ssexi | ⊢ ℝ ∈ V |