Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > ILE Home > Th. List > com23 | GIF version |
Description: Commutation of antecedents. Swap 2nd and 3rd. (Contributed by NM, 5-Aug-1993.) (Proof shortened by Wolf Lammen, 4-Aug-2012.) |
Ref | Expression |
---|---|
com3.1 | ⊢ (𝜑 → (𝜓 → (𝜒 → 𝜃))) |
Ref | Expression |
---|---|
com23 | ⊢ (𝜑 → (𝜒 → (𝜓 → 𝜃))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | com3.1 | . 2 ⊢ (𝜑 → (𝜓 → (𝜒 → 𝜃))) | |
2 | pm2.27 40 | . 2 ⊢ (𝜒 → ((𝜒 → 𝜃) → 𝜃)) | |
3 | 1, 2 | syl9 72 | 1 ⊢ (𝜑 → (𝜒 → (𝜓 → 𝜃))) |
Copyright terms: Public domain | W3C validator |