Description: Binary relation with the complement under the universal class of ordered pairs. (Contributed by Peter Mazsa, 9-Nov-2018)
Ref | Expression | ||
---|---|---|---|
Assertion | brvvdif |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | opelvvdif | ||
2 | df-br | ||
3 | df-br | ||
4 | 3 | notbii | |
5 | 1 2 4 | 3bitr4g |