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Mirrors > Home > MPE Home > Th. List > 0xr | Structured version Visualization version GIF version |
Description: Zero is an extended real. (Contributed by Mario Carneiro, 15-Jun-2014.) |
Ref | Expression |
---|---|
0xr | ⊢ 0 ∈ ℝ* |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ressxr 10950 | . 2 ⊢ ℝ ⊆ ℝ* | |
2 | 0re 10908 | . 2 ⊢ 0 ∈ ℝ | |
3 | 1, 2 | sselii 3914 | 1 ⊢ 0 ∈ ℝ* |
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