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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 1160 | . 2 ⊢ ((𝜑 → 𝜓) ∧ (𝜒 → 𝜓) ∧ (𝜃 → 𝜓)) |
5 | 3jao 1280 | . 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 |
Syntax hints: → wi 4 ∨ w3o 962 ∧ w3a 963 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-io 699 |
This theorem depends on definitions: df-bi 116 df-3or 964 df-3an 965 |
This theorem is referenced by: 3jaoian 1284 3ianorr 1288 acexmidlem1 5778 nndceq 6403 nndcel 6404 znegcl 9109 xrltnr 9596 nltpnft 9627 ngtmnft 9630 xrrebnd 9632 xnegcl 9645 xnegneg 9646 xltnegi 9648 xrpnfdc 9655 xrmnfdc 9656 xnegid 9672 xaddid1 9675 xposdif 9695 |
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