Step |
Hyp |
Ref |
Expression |
1 |
|
lcvfbr.s |
|
2 |
|
lcvfbr.c |
|
3 |
|
lcvfbr.w |
|
4 |
|
elex |
|
5 |
|
fveq2 |
|
6 |
5 1
|
eqtr4di |
|
7 |
6
|
eleq2d |
|
8 |
6
|
eleq2d |
|
9 |
7 8
|
anbi12d |
|
10 |
6
|
rexeqdv |
|
11 |
10
|
notbid |
|
12 |
11
|
anbi2d |
|
13 |
9 12
|
anbi12d |
|
14 |
13
|
opabbidv |
|
15 |
|
df-lcv |
|
16 |
1
|
fvexi |
|
17 |
16 16
|
xpex |
|
18 |
|
opabssxp |
|
19 |
17 18
|
ssexi |
|
20 |
14 15 19
|
fvmpt |
|
21 |
3 4 20
|
3syl |
|
22 |
2 21
|
syl5eq |
|