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| Mirrors > Home > ILE Home > Th. List > 3jaoi | GIF version | ||
| Description: Disjunction of 3 antecedents (inference). (Contributed by NM, 12-Sep-1995.) |
| 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 | . . 3 ⊢ (𝜑 → 𝜓) | |
| 2 | 3jaoi.2 | . . 3 ⊢ (𝜒 → 𝜓) | |
| 3 | 3jaoi.3 | . . 3 ⊢ (𝜃 → 𝜓) | |
| 4 | 1, 2, 3 | 3pm3.2i 1206 | . 2 ⊢ ((𝜑 → 𝜓) ∧ (𝜒 → 𝜓) ∧ (𝜃 → 𝜓)) |
| 5 | 3jao 1342 | . 2 ⊢ (((𝜑 → 𝜓) ∧ (𝜒 → 𝜓) ∧ (𝜃 → 𝜓)) → ((𝜑 ∨ 𝜒 ∨ 𝜃) → 𝜓)) | |
| 6 | 4, 5 | ax-mp 5 | 1 ⊢ ((𝜑 ∨ 𝜒 ∨ 𝜃) → 𝜓) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 ∨ w3o 1008 ∧ w3a 1009 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 721 |
| This proof depends on definitions: df-bi 117 df-3or 1010 df-3an 1011 |
| This theorem is used by: 3jaoian 1346 3ianorr 1350 acexmidlem1 6084 nndceq 6777 nndcel 6778 znegcl 9684 xrltnr 10197 nltpnft 10232 ngtmnft 10235 xrrebnd 10237 xnegcl 10250 xnegneg 10251 xltnegi 10253 xrpnfdc 10260 xrmnfdc 10261 xnegid 10277 xaddid1 10280 xposdif 10300 prm23lt5 13070 ppiublem1 16308 zabsle1 16340 gausslemma2dlem0f 16395 gausslemma2dlem0i 16398 2lgsoddprm 16454 |
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