Description: When R is a relation, the sethood assumptions on brcnv can be omitted. (Contributed by Mario Carneiro, 28-Apr-2015)
Ref | Expression | ||
---|---|---|---|
Assertion | relbrcnvg | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | relcnv | |
|
2 | 1 | brrelex12i | |
3 | 2 | a1i | |
4 | brrelex12 | |
|
5 | 4 | ancomd | |
6 | 5 | ex | |
7 | brcnvg | |
|
8 | 7 | a1i | |
9 | 3 6 8 | pm5.21ndd | |