Step |
Hyp |
Ref |
Expression |
1 |
|
nfnae |
|
2 |
|
nfcvf |
|
3 |
|
nfcvd |
|
4 |
2 3
|
nfeld |
|
5 |
4
|
nfnd |
|
6 |
1 5
|
nfald |
|
7 |
|
nfvd |
|
8 |
|
dveeq2 |
|
9 |
8
|
naecoms |
|
10 |
|
elequ2 |
|
11 |
10
|
notbid |
|
12 |
11
|
biimpd |
|
13 |
12
|
al2imi |
|
14 |
9 13
|
syl6 |
|
15 |
|
elequ1 |
|
16 |
15
|
notbid |
|
17 |
16
|
sps |
|
18 |
17
|
dral1 |
|
19 |
18
|
biimpd |
|
20 |
|
ax-nul |
|
21 |
|
elirrv |
|
22 |
21
|
ax-gen |
|
23 |
22
|
exgen |
|
24 |
6 7 14 19 20 23
|
dvelimexcasei |
|