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Related theorems Unicode version |
| Description: Exportation inference. |
| Ref | Expression |
|---|---|
| exp.1 |
|
| Ref | Expression |
|---|---|
| exp |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-an 198 |
. . 3
| |
| 2 | exp.1 |
. . 3
| |
| 3 | 1, 2 | sylbir 176 |
. 2
|
| 4 | 3 | expi 125 |
1
|