Step |
Hyp |
Ref |
Expression |
1 |
|
ax-hilex |
|
2 |
|
chex |
|
3 |
1 2
|
elmap |
|
4 |
3
|
anbi1i |
|
5 |
|
fveq1 |
|
6 |
5
|
fveqeq2d |
|
7 |
|
fveq1 |
|
8 |
|
fveq1 |
|
9 |
7 8
|
oveq12d |
|
10 |
9
|
eqeq1d |
|
11 |
|
fveq1 |
|
12 |
7 8
|
oveq12d |
|
13 |
11 12
|
eqeq12d |
|
14 |
10 13
|
anbi12d |
|
15 |
14
|
imbi2d |
|
16 |
15
|
2ralbidv |
|
17 |
6 16
|
anbi12d |
|
18 |
|
df-hst |
|
19 |
17 18
|
elrab2 |
|
20 |
|
3anass |
|
21 |
4 19 20
|
3bitr4i |
|