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| Mirrors > Home > MPE Home > Th. List > peano2zd | Structured version Visualization version GIF version | ||
| Description: Deduction from second Peano postulate generalized to integers. (Contributed by Mario Carneiro, 28-May-2016.) |
| Ref | Expression |
|---|---|
| zred.1 | ⊢ (𝜑 → 𝐴 ∈ ℤ) |
| Ref | Expression |
|---|---|
| peano2zd | ⊢ (𝜑 → (𝐴 + 1) ∈ ℤ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | zred.1 | . 2 ⊢ (𝜑 → 𝐴 ∈ ℤ) | |
| 2 | peano2z 12660 | . 2 ⊢ (𝐴 ∈ ℤ → (𝐴 + 1) ∈ ℤ) | |
| 3 | 1, 2 | syl 17 | 1 ⊢ (𝜑 → (𝐴 + 1) ∈ ℤ) |
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