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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 6081 nndceq 6772 nndcel 6773 znegcl 9675 xrltnr 10181 nltpnft 10216 ngtmnft 10219 xrrebnd 10221 xnegcl 10234 xnegneg 10235 xltnegi 10237 xrpnfdc 10244 xrmnfdc 10245 xnegid 10261 xaddid1 10264 xposdif 10284 prm23lt5 13042 zabsle1 16118 gausslemma2dlem0f 16173 gausslemma2dlem0i 16176 2lgsoddprm 16232 |
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