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| Mirrors > Home > MPE Home > Th. List > nncn | Structured version Visualization version GIF version | ||
| Description: A positive integer is a complex number. (Contributed by NM, 18-Aug-1999.) |
| Ref | Expression |
|---|---|
| nncn | ⊢ (𝐴 ∈ ℕ → 𝐴 ∈ ℂ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | nnsscn 12271 | . 2 ⊢ ℕ ⊆ ℂ | |
| 2 | 1 | sseli 3979 | 1 ⊢ (𝐴 ∈ ℕ → 𝐴 ∈ ℂ) |
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