Step |
Hyp |
Ref |
Expression |
1 |
|
ptbas.1 |
|
2 |
|
simp2l |
|
3 |
|
simp1 |
|
4 |
|
fnex |
|
5 |
2 3 4
|
syl2anc |
|
6 |
|
simp2r |
|
7 |
|
difeq2 |
|
8 |
7
|
raleqdv |
|
9 |
8
|
rspcev |
|
10 |
9
|
3ad2ant3 |
|
11 |
2 6 10
|
3jca |
|
12 |
|
fveq1 |
|
13 |
12
|
eqcomd |
|
14 |
13
|
ixpeq2dv |
|
15 |
14
|
biantrud |
|
16 |
|
fneq1 |
|
17 |
12
|
eleq1d |
|
18 |
17
|
ralbidv |
|
19 |
12
|
eqeq1d |
|
20 |
19
|
rexralbidv |
|
21 |
16 18 20
|
3anbi123d |
|
22 |
15 21
|
bitr3d |
|
23 |
5 11 22
|
spcedv |
|
24 |
1
|
elpt |
|
25 |
23 24
|
sylibr |
|