Description: 3impib with the implications of the hypothesis biconditionals. (Contributed by Alan Sare, 6-Nov-2017)
Ref | Expression | ||
---|---|---|---|
Hypothesis | bi123impib.1 | |- ( ph <-> ( ( ps /\ ch ) <-> th ) ) |
|
Assertion | bi123impib | |- ( ( ph /\ ps /\ ch ) -> th ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | bi123impib.1 | |- ( ph <-> ( ( ps /\ ch ) <-> th ) ) |
|
2 | 1 | biimpi | |- ( ph -> ( ( ps /\ ch ) <-> th ) ) |
3 | 2 | bi23impib | |- ( ( ph /\ ps /\ ch ) -> th ) |