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Mirrors > Home > ILE Home > Th. List > 3mix3d | GIF version |
Description: Deduction introducing triple disjunction. (Contributed by Scott Fenton, 8-Jun-2011.) |
Ref | Expression |
---|---|
3mixd.1 | ⊢ (𝜑 → 𝜓) |
Ref | Expression |
---|---|
3mix3d | ⊢ (𝜑 → (𝜒 ∨ 𝜃 ∨ 𝜓)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 3mixd.1 | . 2 ⊢ (𝜑 → 𝜓) | |
2 | 3mix3 1075 | . 2 ⊢ (𝜓 → (𝜒 ∨ 𝜃 ∨ 𝜓)) | |
3 | 1, 2 | syl 14 | 1 ⊢ (𝜑 → (𝜒 ∨ 𝜃 ∨ 𝜓)) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∨ w3o 884 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 99 ax-ia2 100 ax-ia3 101 ax-io 630 |
This theorem depends on definitions: df-bi 110 df-3or 886 |
This theorem is referenced by: nnnegz 8248 |
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