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Mirrors > Home > MPE Home > Th. List > 4re | Structured version Visualization version GIF version |
Description: The number 4 is real. (Contributed by NM, 27-May-1999.) |
Ref | Expression |
---|---|
4re | ⊢ 4 ∈ ℝ |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-4 12038 | . 2 ⊢ 4 = (3 + 1) | |
2 | 3re 12053 | . . 3 ⊢ 3 ∈ ℝ | |
3 | 1re 10975 | . . 3 ⊢ 1 ∈ ℝ | |
4 | 2, 3 | readdcli 10990 | . 2 ⊢ (3 + 1) ∈ ℝ |
5 | 1, 4 | eqeltri 2835 | 1 ⊢ 4 ∈ ℝ |
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