Step |
Hyp |
Ref |
Expression |
1 |
|
nfwrecs.1 |
|
2 |
|
nfwrecs.2 |
|
3 |
|
nfwrecs.3 |
|
4 |
|
df-wrecs |
|
5 |
|
nfv |
|
6 |
|
nfcv |
|
7 |
6 2
|
nfss |
|
8 |
|
nfcv |
|
9 |
1 2 8
|
nfpred |
|
10 |
9 6
|
nfss |
|
11 |
6 10
|
nfralw |
|
12 |
7 11
|
nfan |
|
13 |
|
nfcv |
|
14 |
13 9
|
nfres |
|
15 |
3 14
|
nffv |
|
16 |
15
|
nfeq2 |
|
17 |
6 16
|
nfralw |
|
18 |
5 12 17
|
nf3an |
|
19 |
18
|
nfex |
|
20 |
19
|
nfab |
|
21 |
20
|
nfuni |
|
22 |
4 21
|
nfcxfr |
|