Description: The transposition swaps arguments of a three-parameter relation. (Contributed by Mario Carneiro, 3-Nov-2015)
Ref | Expression | ||
---|---|---|---|
Assertion | relbrtpos |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | reltpos | ||
2 | 1 | a1i | |
3 | brrelex2 | ||
4 | 2 3 | sylan | |
5 | brrelex2 | ||
6 | brtpos | ||
7 | 4 5 6 | pm5.21nd |