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Mirrors > Home > MPE Home > Th. List > rexri | Structured version Visualization version GIF version |
Description: A standard real is an extended real (inference form.) (Contributed by David Moews, 28-Feb-2017.) |
Ref | Expression |
---|---|
rexri.1 | ⊢ 𝐴 ∈ ℝ |
Ref | Expression |
---|---|
rexri | ⊢ 𝐴 ∈ ℝ* |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | rexri.1 | . 2 ⊢ 𝐴 ∈ ℝ | |
2 | rexr 10952 | . 2 ⊢ (𝐴 ∈ ℝ → 𝐴 ∈ ℝ*) | |
3 | 1, 2 | ax-mp 5 | 1 ⊢ 𝐴 ∈ ℝ* |
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