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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 11097 | . 2 ⊢ 4 ∈ ℝ | |
| 2 | 1 | recni 10052 | 1 ⊢ 4 ∈ ℂ |
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