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Mirrors > Home > ILE Home > Th. List > adantl | GIF version |
Description: Inference adding a conjunct to the left of an antecedent. (Contributed by NM, 30-Aug-1993.) (Proof shortened by Wolf Lammen, 23-Nov-2012.) |
Ref | Expression |
---|---|
adantl.1 | ⊢ (𝜑 → 𝜓) |
Ref | Expression |
---|---|
adantl | ⊢ ((𝜒 ∧ 𝜑) → 𝜓) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | adantl.1 | . . 3 ⊢ (𝜑 → 𝜓) | |
2 | 1 | adantr 274 | . 2 ⊢ ((𝜑 ∧ 𝜒) → 𝜓) |
3 | 2 | ancoms 266 | 1 ⊢ ((𝜒 ∧ 𝜑) → 𝜓) |
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