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Mirrors > Home > MPE Home > Th. List > 4cn | Structured version Visualization version GIF version |
Description: The number 4 is a complex number. (Contributed by David A. Wheeler, 7-Jul-2016.) |
Ref | Expression |
---|---|
4cn | ⊢ 4 ∈ ℂ |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 4re 10974 | . 2 ⊢ 4 ∈ ℝ | |
2 | 1 | recni 9931 | 1 ⊢ 4 ∈ ℂ |
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