Step |
Hyp |
Ref |
Expression |
1 |
|
fpwwe2.1 |
|
2 |
|
fpwwe2.2 |
|
3 |
|
fpwwe2.3 |
|
4 |
2
|
adantr |
|
5 |
|
simpr1 |
|
6 |
4 5
|
ssexd |
|
7 |
6 6
|
xpexd |
|
8 |
|
simpr2 |
|
9 |
7 8
|
ssexd |
|
10 |
|
simpl |
|
11 |
10
|
sseq1d |
|
12 |
|
simpr |
|
13 |
10
|
sqxpeqd |
|
14 |
12 13
|
sseq12d |
|
15 |
12 10
|
weeq12d |
|
16 |
11 14 15
|
3anbi123d |
|
17 |
|
oveq12 |
|
18 |
17
|
eleq1d |
|
19 |
16 18
|
imbi12d |
|
20 |
3
|
ex |
|
21 |
20
|
adantr |
|
22 |
6 9 19 21
|
vtocl2d |
|
23 |
22
|
syldbl2 |
|