Step |
Hyp |
Ref |
Expression |
1 |
|
vex |
|
2 |
|
simp2 |
|
3 |
2
|
ad2antrr |
|
4 |
|
ssrab2 |
|
5 |
|
simpr |
|
6 |
4 5
|
sseldi |
|
7 |
|
fdm |
|
8 |
7
|
pweqd |
|
9 |
2 8
|
syl |
|
10 |
9
|
adantr |
|
11 |
6 10
|
eleqtrd |
|
12 |
|
elpwi |
|
13 |
11 12
|
syl |
|
14 |
13
|
sselda |
|
15 |
3 14
|
ffvelrnd |
|
16 |
15
|
ralrimiva |
|
17 |
|
nfcv |
|
18 |
17
|
esumcl |
|
19 |
1 16 18
|
sylancr |
|
20 |
19
|
ralrimiva |
|
21 |
|
eqid |
|
22 |
21
|
rnmptss |
|
23 |
20 22
|
syl |
|