Step |
Hyp |
Ref |
Expression |
1 |
|
nfra1 |
|
2 |
|
nfv |
|
3 |
|
eleq2 |
|
4 |
|
vex |
|
5 |
4
|
a1i |
|
6 |
|
rspa |
|
7 |
1 2 3 5 6
|
elabreximd |
|
8 |
7
|
ex |
|
9 |
8
|
alrimiv |
|
10 |
9
|
adantl |
|
11 |
|
nfra1 |
|
12 |
2
|
nfci |
|
13 |
|
nfre1 |
|
14 |
13
|
nfab |
|
15 |
12 14
|
nfel |
|
16 |
15 2
|
nfim |
|
17 |
16
|
nfal |
|
18 |
11 17
|
nfan |
|
19 |
|
rspa |
|
20 |
19
|
elexd |
|
21 |
20
|
adantlr |
|
22 |
|
simplr |
|
23 |
|
rspe |
|
24 |
|
tbtru |
|
25 |
23 24
|
sylib |
|
26 |
25
|
ex |
|
27 |
26
|
alrimiv |
|
28 |
27
|
adantl |
|
29 |
|
elabgt |
|
30 |
|
tbtru |
|
31 |
29 30
|
sylibr |
|
32 |
21 28 31
|
syl2anc |
|
33 |
|
eleq1 |
|
34 |
33 3
|
imbi12d |
|
35 |
34
|
spcgv |
|
36 |
35
|
imp |
|
37 |
36
|
imp |
|
38 |
21 22 32 37
|
syl21anc |
|
39 |
38
|
ex |
|
40 |
18 39
|
ralrimi |
|
41 |
10 40
|
impbida |
|
42 |
41
|
abbidv |
|
43 |
|
df-iin |
|
44 |
43
|
a1i |
|
45 |
|
df-int |
|
46 |
45
|
a1i |
|
47 |
42 44 46
|
3eqtr4d |
|