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Mirrors > Home > ILE Home > Th. List > nncnd | GIF version |
Description: A positive integer is a complex number. (Contributed by Mario Carneiro, 27-May-2016.) |
Ref | Expression |
---|---|
nnred.1 | ⊢ (𝜑 → 𝐴 ∈ ℕ) |
Ref | Expression |
---|---|
nncnd | ⊢ (𝜑 → 𝐴 ∈ ℂ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nnsscn 8883 | . 2 ⊢ ℕ ⊆ ℂ | |
2 | nnred.1 | . 2 ⊢ (𝜑 → 𝐴 ∈ ℕ) | |
3 | 1, 2 | sselid 3145 | 1 ⊢ (𝜑 → 𝐴 ∈ ℂ) |
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