Step |
Hyp |
Ref |
Expression |
1 |
|
axpowndlem4 |
|
2 |
|
axpowndlem1 |
|
3 |
2
|
aecoms |
|
4 |
2
|
a1d |
|
5 |
|
nfnae |
|
6 |
|
nfae |
|
7 |
5 6
|
nfan |
|
8 |
|
el |
|
9 |
|
nfcvf2 |
|
10 |
|
nfcvd |
|
11 |
9 10
|
nfeld |
|
12 |
|
elequ2 |
|
13 |
12
|
a1i |
|
14 |
5 11 13
|
cbvexd |
|
15 |
8 14
|
mpbii |
|
16 |
15
|
19.8ad |
|
17 |
|
df-ex |
|
18 |
16 17
|
sylib |
|
19 |
18
|
adantr |
|
20 |
|
biidd |
|
21 |
20
|
dral1 |
|
22 |
|
alnex |
|
23 |
|
alnex |
|
24 |
21 22 23
|
3bitr3g |
|
25 |
|
nd2 |
|
26 |
|
mtt |
|
27 |
25 26
|
syl |
|
28 |
24 27
|
bitrd |
|
29 |
28
|
dral2 |
|
30 |
29
|
adantl |
|
31 |
19 30
|
mtbid |
|
32 |
31
|
pm2.21d |
|
33 |
7 32
|
alrimi |
|
34 |
33
|
19.8ad |
|
35 |
34
|
a1d |
|
36 |
35
|
ex |
|
37 |
4 36
|
pm2.61i |
|
38 |
1 3 37
|
pm2.61ii |
|