Description: Uncurried (imported) form of imbi12 . (Contributed by BJ, 6-May-2019)
Ref | Expression | ||
---|---|---|---|
Assertion | bj-imbi12 | |- ( ( ( ph <-> ps ) /\ ( ch <-> th ) ) -> ( ( ph -> ch ) <-> ( ps -> th ) ) ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | imbi12 | |- ( ( ph <-> ps ) -> ( ( ch <-> th ) -> ( ( ph -> ch ) <-> ( ps -> th ) ) ) ) |
|
2 | 1 | imp | |- ( ( ( ph <-> ps ) /\ ( ch <-> th ) ) -> ( ( ph -> ch ) <-> ( ps -> th ) ) ) |