Step |
Hyp |
Ref |
Expression |
1 |
|
madef |
|
2 |
1
|
ffvelrni |
|
3 |
2
|
elpwid |
|
4 |
3
|
sseld |
|
5 |
|
scutcl |
|
6 |
|
eleq1 |
|
7 |
6
|
biimpd |
|
8 |
5 7
|
mpan9 |
|
9 |
8
|
rexlimivw |
|
10 |
9
|
rexlimivw |
|
11 |
10
|
a1i |
|
12 |
|
madeval2 |
|
13 |
12
|
eleq2d |
|
14 |
|
eqeq2 |
|
15 |
14
|
anbi2d |
|
16 |
15
|
2rexbidv |
|
17 |
16
|
elrab3 |
|
18 |
13 17
|
sylan9bb |
|
19 |
18
|
ex |
|
20 |
4 11 19
|
pm5.21ndd |
|