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Mirrors > Home > ILE Home > Th. List > nn0z | GIF version |
Description: A nonnegative integer is an integer. (Contributed by NM, 9-May-2004.) |
Ref | Expression |
---|---|
nn0z | ⊢ (𝑁 ∈ ℕ0 → 𝑁 ∈ ℤ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nn0ssz 9230 | . 2 ⊢ ℕ0 ⊆ ℤ | |
2 | 1 | sseli 3143 | 1 ⊢ (𝑁 ∈ ℕ0 → 𝑁 ∈ ℤ) |
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