Description: A chained equality inference for a binary relation. (Contributed by NM, 24-Apr-2005)
Ref | Expression | ||
---|---|---|---|
Hypotheses | breqtrrid.1 | |
|
breqtrrid.2 | |
||
Assertion | breqtrrid | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | breqtrrid.1 | |
|
2 | breqtrrid.2 | |
|
3 | 2 | eqcomd | |
4 | 1 3 | breqtrid | |