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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 9680 xrltnr 10192 nltpnft 10227 ngtmnft 10230 xrrebnd 10232 xnegcl 10245 xnegneg 10246 xltnegi 10248 xrpnfdc 10255 xrmnfdc 10256 xnegid 10272 xaddid1 10275 xposdif 10295 prm23lt5 13065 ppiublem1 16252 zabsle1 16284 gausslemma2dlem0f 16339 gausslemma2dlem0i 16342 2lgsoddprm 16398 |
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