Description: A closed form of mpbir , analogous to pm2.27 (assertion). (Contributed by Jonathan Ben-Naim, 3-Jun-2011) (Proof shortened by Roger Witte, 17-Aug-2020)
| Ref | Expression | ||
|---|---|---|---|
| Assertion | bianir | |- ( ( ph /\ ( ps <-> ph ) ) -> ps ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | biimpr | |- ( ( ps <-> ph ) -> ( ph -> ps ) ) |
|
| 2 | 1 | impcom | |- ( ( ph /\ ( ps <-> ph ) ) -> ps ) |