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Related theorems Unicode version |
| Description: Importation from double to triple conjunction. |
| Ref | Expression |
|---|---|
| 3impa.1 |
|
| Ref | Expression |
|---|---|
| 3impa |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 3impa.1 |
. . 3
| |
| 2 | 1 | exp31 376 |
. 2
|
| 3 | 2 | 3imp 826 |
1
|