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| Mirrors > Home > MPE Home > Th. List > 3z | Structured version Visualization version GIF version | ||
| Description: 3 is an integer. (Contributed by David A. Wheeler, 8-Dec-2018.) |
| Ref | Expression |
|---|---|
| 3z | ⊢ 3 ∈ ℤ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 3nn 12345 | . 2 ⊢ 3 ∈ ℕ | |
| 2 | 1 | nnzi 12641 | 1 ⊢ 3 ∈ ℤ |
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