Description: /\ -manipulation. (Contributed by Jonathan Ben-Naim, 3-Jun-2011) (New usage is discouraged.)
Ref | Expression | ||
---|---|---|---|
Assertion | bnj256 | |- ( ( ph /\ ps /\ ch /\ th ) <-> ( ( ph /\ ps ) /\ ( ch /\ th ) ) ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | bnj248 | |- ( ( ph /\ ps /\ ch /\ th ) <-> ( ( ( ph /\ ps ) /\ ch ) /\ th ) ) |
|
2 | anass | |- ( ( ( ( ph /\ ps ) /\ ch ) /\ th ) <-> ( ( ph /\ ps ) /\ ( ch /\ th ) ) ) |
|
3 | 1 2 | bitri | |- ( ( ph /\ ps /\ ch /\ th ) <-> ( ( ph /\ ps ) /\ ( ch /\ th ) ) ) |