| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > bicomd | Structured version Visualization version GIF version | ||
| Description: Commute two sides of a biconditional in a deduction. (Contributed by NM, 14-May-1993.) |
| Ref | Expression |
|---|---|
| bicomd.1 | ⊢ (𝜑 → (𝜓 ↔ 𝜒)) |
| Ref | Expression |
|---|---|
| bicomd | ⊢ (𝜑 → (𝜒 ↔ 𝜓)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | bicomd.1 | . 2 ⊢ (𝜑 → (𝜓 ↔ 𝜒)) | |
| 2 | bicom 222 | . 2 ⊢ ((𝜓 ↔ 𝜒) ↔ (𝜒 ↔ 𝜓)) | |
| 3 | 1, 2 | sylib 218 | 1 ⊢ (𝜑 → (𝜒 ↔ 𝜓)) |
| Copyright terms: Public domain | W3C validator |