Description: Elementhood in a domain of a converse. (Contributed by Peter Mazsa, 25-May-2018)
Ref | Expression | ||
---|---|---|---|
Assertion | eldmcnv | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eldmg | |
|
2 | brcnvg | |
|
3 | 2 | elvd | |
4 | 3 | exbidv | |
5 | 1 4 | bitrd | |