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| Mirrors > Home > MPE Home > Th. List > impd | Structured version Visualization version GIF version | ||
| Description: Importation deduction. (Contributed by NM, 31-Mar-1994.) |
| Ref | Expression |
|---|---|
| impd.1 | ⊢ (𝜑 → (𝜓 → (𝜒 → 𝜃))) |
| Ref | Expression |
|---|---|
| impd | ⊢ (𝜑 → ((𝜓 ∧ 𝜒) → 𝜃)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | impd.1 | . . . 4 ⊢ (𝜑 → (𝜓 → (𝜒 → 𝜃))) | |
| 2 | 1 | com3l 89 | . . 3 ⊢ (𝜓 → (𝜒 → (𝜑 → 𝜃))) |
| 3 | 2 | imp 406 | . 2 ⊢ ((𝜓 ∧ 𝜒) → (𝜑 → 𝜃)) |
| 4 | 3 | com12 32 | 1 ⊢ (𝜑 → ((𝜓 ∧ 𝜒) → 𝜃)) |
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