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| Mirrors > Home > MPE Home > Th. List > rexr | Structured version Visualization version GIF version | ||
| Description: A standard real is an extended real. (Contributed by NM, 14-Oct-2005.) |
| Ref | Expression |
|---|---|
| rexr | ⊢ (𝐴 ∈ ℝ → 𝐴 ∈ ℝ*) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ressxr 11305 | . 2 ⊢ ℝ ⊆ ℝ* | |
| 2 | 1 | sseli 3979 | 1 ⊢ (𝐴 ∈ ℝ → 𝐴 ∈ ℝ*) |
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