Description: A chained inference from transitive law for logical equivalence. (Contributed by NM, 4-Aug-2006)
Ref | Expression | ||
---|---|---|---|
Hypotheses | 3bitr2i.1 | |
|
3bitr2i.2 | |
||
3bitr2i.3 | |
||
Assertion | 3bitr2i | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 3bitr2i.1 | |
|
2 | 3bitr2i.2 | |
|
3 | 3bitr2i.3 | |
|
4 | 1 2 | bitr4i | |
5 | 4 3 | bitri | |