Description: A simpler equivalence for single-rooted (see funcnv ). (Contributed by NM, 9-Aug-2004)
Ref | Expression | ||
---|---|---|---|
Assertion | funcnv2 | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | relcnv | |
|
2 | dffun6 | |
|
3 | 1 2 | mpbiran | |
4 | vex | |
|
5 | vex | |
|
6 | 4 5 | brcnv | |
7 | 6 | mobii | |
8 | 7 | albii | |
9 | 3 8 | bitri | |