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Mirrors > Home > ILE Home > Th. List > 2z | GIF version |
Description: Two is an integer. (Contributed by NM, 10-May-2004.) |
Ref | Expression |
---|---|
2z | ⊢ 2 ∈ ℤ |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 2nn 9014 | . 2 ⊢ 2 ∈ ℕ | |
2 | 1 | nnzi 9208 | 1 ⊢ 2 ∈ ℤ |
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