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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 10950 | . 2 ⊢ ℝ ⊆ ℝ* | |
2 | 1 | sseli 3913 | 1 ⊢ (𝐴 ∈ ℝ → 𝐴 ∈ ℝ*) |
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