Description: Element of the class of transitive relations. (Contributed by Peter Mazsa, 22-Aug-2021)
Ref | Expression | ||
---|---|---|---|
Assertion | eltrrels3 | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | dftrrels3 | |
|
2 | breq | |
|
3 | breq | |
|
4 | 2 3 | anbi12d | |
5 | breq | |
|
6 | 4 5 | imbi12d | |
7 | 6 | 2albidv | |
8 | 7 | albidv | |
9 | 1 8 | rabeqel | |