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Mirrors > Home > ILE Home > Th. List > imp | GIF version |
Description: Importation inference. (Contributed by NM, 5-Aug-1993.) (Proof shortened by Eric Schmidt, 22-Dec-2006.) |
Ref | Expression |
---|---|
imp.1 | ⊢ (𝜑 → (𝜓 → 𝜒)) |
Ref | Expression |
---|---|
imp | ⊢ ((𝜑 ∧ 𝜓) → 𝜒) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | simpl 108 | . 2 ⊢ ((𝜑 ∧ 𝜓) → 𝜑) | |
2 | simpr 109 | . 2 ⊢ ((𝜑 ∧ 𝜓) → 𝜓) | |
3 | imp.1 | . 2 ⊢ (𝜑 → (𝜓 → 𝜒)) | |
4 | 1, 2, 3 | sylc 62 | 1 ⊢ ((𝜑 ∧ 𝜓) → 𝜒) |
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