Step |
Hyp |
Ref |
Expression |
1 |
|
nfcv |
|
2 |
|
nfab1 |
|
3 |
|
nfv |
|
4 |
2 3
|
nfralw |
|
5 |
|
nfv |
|
6 |
|
fveq2 |
|
7 |
6
|
sseq1d |
|
8 |
7
|
ralbidv |
|
9 |
1 2 4 5 8
|
cbvrabw |
|
10 |
|
df-rab |
|
11 |
|
abid |
|
12 |
|
df-ral |
|
13 |
|
df-sbc |
|
14 |
13
|
imbi1i |
|
15 |
14
|
albii |
|
16 |
12 15
|
bitr4i |
|
17 |
11 16
|
anbi12i |
|
18 |
17
|
abbii |
|
19 |
9 10 18
|
3eqtri |
|
20 |
|
scottex |
|
21 |
19 20
|
eqeltrri |
|