| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| 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 6776 nndcel 6777 znegcl 9686 xrltnr 10198 nltpnft 10233 ngtmnft 10236 xrrebnd 10238 xnegcl 10251 xnegneg 10252 xltnegi 10254 xrpnfdc 10261 xrmnfdc 10262 xnegid 10278 xaddid1 10281 xposdif 10301 prm23lt5 13071 ppiublem1 16291 zabsle1 16323 gausslemma2dlem0f 16378 gausslemma2dlem0i 16381 2lgsoddprm 16437 |
| Copyright terms: Public domain | W3C validator |