Description: Bound-variable hypothesis builder for a function. (Contributed by NM, 30-Jan-2004)
Ref | Expression | ||
---|---|---|---|
Hypothesis | nffun.1 | |
|
Assertion | nffun | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nffun.1 | |
|
2 | df-fun | |
|
3 | 1 | nfrel | |
4 | 1 | nfcnv | |
5 | 1 4 | nfco | |
6 | nfcv | |
|
7 | 5 6 | nfss | |
8 | 3 7 | nfan | |
9 | 2 8 | nfxfr | |