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| Mirrors > Home > MPE Home > Th. List > nnexpcld | Structured version Visualization version GIF version | ||
| Description: Closure of exponentiation of nonnegative integers. (Contributed by Mario Carneiro, 28-May-2016.) |
| Ref | Expression |
|---|---|
| nnexpcld.1 | ⊢ (𝜑 → 𝐴 ∈ ℕ) |
| nnexpcld.2 | ⊢ (𝜑 → 𝑁 ∈ ℕ0) |
| Ref | Expression |
|---|---|
| nnexpcld | ⊢ (𝜑 → (𝐴↑𝑁) ∈ ℕ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | nnexpcld.1 | . 2 ⊢ (𝜑 → 𝐴 ∈ ℕ) | |
| 2 | nnexpcld.2 | . 2 ⊢ (𝜑 → 𝑁 ∈ ℕ0) | |
| 3 | nnexpcl 14098 | . 2 ⊢ ((𝐴 ∈ ℕ ∧ 𝑁 ∈ ℕ0) → (𝐴↑𝑁) ∈ ℕ) | |
| 4 | 1, 2, 3 | syl2anc 584 | 1 ⊢ (𝜑 → (𝐴↑𝑁) ∈ ℕ) |
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