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Related theorems Unicode version |
| Description: Infer a converse implication from a logical equivalence. |
| Ref | Expression |
|---|---|
| biimpr.1 |
|
| Ref | Expression |
|---|---|
| biimpr |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | biimpr.1 |
. 2
| |
| 2 | bi2 149 |
. 2
| |
| 3 | 1, 2 | ax-mp 7 |
1
|