Step |
Hyp |
Ref |
Expression |
1 |
|
nfe1 |
|
2 |
|
nfv |
|
3 |
|
nfv |
|
4 |
|
nfa1 |
|
5 |
3 4
|
nfan |
|
6 |
5
|
nfex |
|
7 |
2 6
|
nfbi |
|
8 |
7
|
nfal |
|
9 |
1 8
|
nfim |
|
10 |
9
|
nfex |
|
11 |
|
elequ2 |
|
12 |
11
|
anbi1d |
|
13 |
12
|
exbidv |
|
14 |
13
|
bibi2d |
|
15 |
14
|
albidv |
|
16 |
15
|
imbi2d |
|
17 |
16
|
exbidv |
|
18 |
|
axrepnd |
|
19 |
|
19.3v |
|
20 |
|
19.3v |
|
21 |
20
|
anbi1i |
|
22 |
21
|
exbii |
|
23 |
19 22
|
bibi12i |
|
24 |
23
|
albii |
|
25 |
24
|
imbi2i |
|
26 |
25
|
exbii |
|
27 |
18 26
|
mpbi |
|
28 |
10 17 27
|
chvar |
|
29 |
28
|
19.35i |
|
30 |
|
nfv |
|
31 |
|
nfe1 |
|
32 |
30 31
|
nfbi |
|
33 |
32
|
nfal |
|
34 |
|
elequ2 |
|
35 |
|
nfa1 |
|
36 |
35
|
19.3 |
|
37 |
36
|
anbi2i |
|
38 |
37
|
exbii |
|
39 |
38
|
a1i |
|
40 |
34 39
|
bibi12d |
|
41 |
40
|
albidv |
|
42 |
8 33 41
|
cbvexv1 |
|
43 |
29 42
|
sylib |
|