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Mirrors > Home > MPE Home > Th. List > neg1cn | Structured version Visualization version GIF version |
Description: -1 is a complex number. (Contributed by David A. Wheeler, 7-Jul-2016.) |
Ref | Expression |
---|---|
neg1cn | ⊢ -1 ∈ ℂ |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ax-1cn 10787 | . 2 ⊢ 1 ∈ ℂ | |
2 | 1 | negcli 11146 | 1 ⊢ -1 ∈ ℂ |
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