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Related theorems Unicode version |
| Description: Commutation of antecedents. Swap 2nd and 3rd. |
| Ref | Expression |
|---|---|
| com3.1 |
|
| Ref | Expression |
|---|---|
| com23 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | com3.1 |
. 2
| |
| 2 | pm2.04 31 |
. 2
| |
| 3 | 1, 2 | syl 12 |
1
|