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| Mirrors > Home > MPE Home > Th. List > ringcld | Structured version Visualization version GIF version | ||
| Description: Closure of the multiplication operation of a ring. (Contributed by SN, 29-Jul-2024.) |
| Ref | Expression |
|---|---|
| ringcld.b | ⊢ 𝐵 = (Base‘𝑅) |
| ringcld.t | ⊢ · = (.r‘𝑅) |
| ringcld.r | ⊢ (𝜑 → 𝑅 ∈ Ring) |
| ringcld.x | ⊢ (𝜑 → 𝑋 ∈ 𝐵) |
| ringcld.y | ⊢ (𝜑 → 𝑌 ∈ 𝐵) |
| Ref | Expression |
|---|---|
| ringcld | ⊢ (𝜑 → (𝑋 · 𝑌) ∈ 𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ringcld.r | . 2 ⊢ (𝜑 → 𝑅 ∈ Ring) | |
| 2 | ringcld.x | . 2 ⊢ (𝜑 → 𝑋 ∈ 𝐵) | |
| 3 | ringcld.y | . 2 ⊢ (𝜑 → 𝑌 ∈ 𝐵) | |
| 4 | ringcld.b | . . 3 ⊢ 𝐵 = (Base‘𝑅) | |
| 5 | ringcld.t | . . 3 ⊢ · = (.r‘𝑅) | |
| 6 | 4, 5 | ringcl 20183 | . 2 ⊢ ((𝑅 ∈ Ring ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋 · 𝑌) ∈ 𝐵) |
| 7 | 1, 2, 3, 6 | syl3anc 1373 | 1 ⊢ (𝜑 → (𝑋 · 𝑌) ∈ 𝐵) |
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