Description: Bound-variable hypothesis builder for domain. (Contributed by NM, 30-Jan-2004) (Revised by Mario Carneiro, 15-Oct-2016)
Ref | Expression | ||
---|---|---|---|
Hypothesis | nfrn.1 | |
|
Assertion | nfdm | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nfrn.1 | |
|
2 | df-dm | |
|
3 | nfcv | |
|
4 | nfcv | |
|
5 | 3 1 4 | nfbr | |
6 | 5 | nfex | |
7 | 6 | nfab | |
8 | 2 7 | nfcxfr | |