Description: Bound-variable hypothesis builder for the well-ordered recursive function generator. (Contributed by Scott Fenton, 9-Jun-2018) (Proof shortened by Scott Fenton, 17-Nov-2024)
Ref | Expression | ||
---|---|---|---|
Hypotheses | nfwrecs.1 | |
|
nfwrecs.2 | |
||
nfwrecs.3 | |
||
Assertion | nfwrecs | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nfwrecs.1 | |
|
2 | nfwrecs.2 | |
|
3 | nfwrecs.3 | |
|
4 | df-wrecs | |
|
5 | nfcv | |
|
6 | 3 5 | nfco | |
7 | 1 2 6 | nffrecs | |
8 | 4 7 | nfcxfr | |