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Mirrors > Home > MPE Home > Th. List > mpancom | Structured version Visualization version GIF version |
Description: An inference based on modus ponens with commutation of antecedents. (Contributed by NM, 28-Oct-2003.) (Proof shortened by Wolf Lammen, 7-Apr-2013.) |
Ref | Expression |
---|---|
mpancom.1 | ⊢ (𝜓 → 𝜑) |
mpancom.2 | ⊢ ((𝜑 ∧ 𝜓) → 𝜒) |
Ref | Expression |
---|---|
mpancom | ⊢ (𝜓 → 𝜒) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | mpancom.1 | . 2 ⊢ (𝜓 → 𝜑) | |
2 | id 22 | . 2 ⊢ (𝜓 → 𝜓) | |
3 | mpancom.2 | . 2 ⊢ ((𝜑 ∧ 𝜓) → 𝜒) | |
4 | 1, 2, 3 | syl2anc 584 | 1 ⊢ (𝜓 → 𝜒) |
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