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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 13776 | . 2 ⊢ ((𝐴 ∈ ℕ ∧ 𝑁 ∈ ℕ0) → (𝐴↑𝑁) ∈ ℕ) | |
4 | 1, 2, 3 | syl2anc 583 | 1 ⊢ (𝜑 → (𝐴↑𝑁) ∈ ℕ) |
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