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| Mirrors > Home > MPE Home > Th. List > nn0z | Structured version Visualization version 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 12636 | . 2 ⊢ ℕ0 ⊆ ℤ | |
| 2 | 1 | sseli 3979 | 1 ⊢ (𝑁 ∈ ℕ0 → 𝑁 ∈ ℤ) |
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