Step |
Hyp |
Ref |
Expression |
1 |
|
axpowndlem3 |
|
2 |
1
|
ax-gen |
|
3 |
|
nfnae |
|
4 |
|
nfnae |
|
5 |
3 4
|
nfan |
|
6 |
|
nfcvf |
|
7 |
6
|
adantr |
|
8 |
|
nfcvd |
|
9 |
7 8
|
nfeqd |
|
10 |
9
|
nfnd |
|
11 |
|
nfnae |
|
12 |
|
nfnae |
|
13 |
11 12
|
nfan |
|
14 |
|
nfv |
|
15 |
|
nfnae |
|
16 |
|
nfnae |
|
17 |
15 16
|
nfan |
|
18 |
7 8
|
nfeld |
|
19 |
17 18
|
nfexd |
|
20 |
|
nfcvf |
|
21 |
20
|
adantl |
|
22 |
7 21
|
nfeld |
|
23 |
14 22
|
nfald |
|
24 |
19 23
|
nfimd |
|
25 |
13 24
|
nfald |
|
26 |
8 7
|
nfeld |
|
27 |
25 26
|
nfimd |
|
28 |
14 27
|
nfald |
|
29 |
13 28
|
nfexd |
|
30 |
10 29
|
nfimd |
|
31 |
|
equequ2 |
|
32 |
31
|
notbid |
|
33 |
32
|
adantl |
|
34 |
|
nfcvd |
|
35 |
|
nfcvf2 |
|
36 |
35
|
adantr |
|
37 |
34 36
|
nfeqd |
|
38 |
13 37
|
nfan1 |
|
39 |
|
nfcvd |
|
40 |
|
nfcvf2 |
|
41 |
40
|
adantl |
|
42 |
39 41
|
nfeqd |
|
43 |
17 42
|
nfan1 |
|
44 |
|
elequ2 |
|
45 |
44
|
adantl |
|
46 |
43 45
|
exbid |
|
47 |
|
biidd |
|
48 |
47
|
a1i |
|
49 |
5 22 48
|
cbvald |
|
50 |
49
|
adantr |
|
51 |
46 50
|
imbi12d |
|
52 |
38 51
|
albid |
|
53 |
|
elequ1 |
|
54 |
53
|
adantl |
|
55 |
52 54
|
imbi12d |
|
56 |
55
|
ex |
|
57 |
5 27 56
|
cbvald |
|
58 |
13 57
|
exbid |
|
59 |
58
|
adantr |
|
60 |
33 59
|
imbi12d |
|
61 |
60
|
ex |
|
62 |
5 30 61
|
cbvald |
|
63 |
2 62
|
mpbii |
|
64 |
63
|
19.21bi |
|
65 |
64
|
ex |
|