Description: The domain and range of a transposition. (Contributed by NM, 10-Sep-2015)
Ref | Expression | ||
---|---|---|---|
Assertion | tposf | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | relxp | |
|
2 | tposf2 | |
|
3 | 1 2 | ax-mp | |
4 | cnvxp | |
|
5 | 4 | feq2i | |
6 | 3 5 | sylib | |