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| Mirrors > Home > MPE Home > Th. List > ax-1cn | Structured version Visualization version GIF version | ||
| Description: 1 is a complex number. Axiom 2 of 22 for real and complex numbers, justified by Theorem ax1cn 11189. (Contributed by NM, 1-Mar-1995.) |
| Ref | Expression |
|---|---|
| ax-1cn | ⊢ 1 ∈ ℂ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | c1 11156 | . 2 class 1 | |
| 2 | cc 11153 | . 2 class ℂ | |
| 3 | 1, 2 | wcel 2108 | 1 wff 1 ∈ ℂ |
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