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| Mirrors > Home > MPE Home > Th. List > 3jaoi | Structured version Visualization version GIF version | ||
| Description: Disjunction of three antecedents (inference). (Contributed by NM, 12-Sep-1995.) (Proof shortened by Garrett Katz, 16-Jun-2026.) |
| Ref | Expression |
|---|---|
| 3jaoi.1 | ⊢ (𝜑 → 𝜓) |
| 3jaoi.2 | ⊢ (𝜒 → 𝜓) |
| 3jaoi.3 | ⊢ (𝜃 → 𝜓) |
| Ref | Expression |
|---|---|
| 3jaoi | ⊢ ((𝜑 ∨ 𝜒 ∨ 𝜃) → 𝜓) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 3jaoi.1 | . 2 ⊢ (𝜑 → 𝜓) | |
| 2 | 3jaoi.2 | . 2 ⊢ (𝜒 → 𝜓) | |
| 3 | 3jaoi.3 | . 2 ⊢ (𝜃 → 𝜓) | |
| 4 | 3jaob 1447 | . 2 ⊢ (((𝜑 ∨ 𝜒 ∨ 𝜃) → 𝜓) ↔ ((𝜑 → 𝜓) ∧ (𝜒 → 𝜓) ∧ (𝜃 → 𝜓))) | |
| 5 | 1, 2, 3, 4 | mpbir3an 1356 | 1 ⊢ ((𝜑 ∨ 𝜒 ∨ 𝜃) → 𝜓) |
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