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Mirrors > Home > MPE Home > Th. List > 1z | Structured version Visualization version GIF version |
Description: One is an integer. (Contributed by NM, 10-May-2004.) |
Ref | Expression |
---|---|
1z | ⊢ 1 ∈ ℤ |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 1nn 11967 | . 2 ⊢ 1 ∈ ℕ | |
2 | 1 | nnzi 12327 | 1 ⊢ 1 ∈ ℤ |
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