Step |
Hyp |
Ref |
Expression |
1 |
|
df-ico |
|
2 |
1
|
reseq1i |
|
3 |
|
ressxr |
|
4 |
|
resmpo |
|
5 |
3 3 4
|
mp2an |
|
6 |
2 5
|
eqtri |
|
7 |
6
|
rneqi |
|
8 |
7
|
eleq2i |
|
9 |
|
eqid |
|
10 |
|
xrex |
|
11 |
10
|
rabex |
|
12 |
9 11
|
elrnmpo |
|
13 |
3
|
sseli |
|
14 |
13
|
adantr |
|
15 |
3
|
sseli |
|
16 |
15
|
adantl |
|
17 |
|
icoval |
|
18 |
14 16 17
|
syl2anc |
|
19 |
18
|
eqcomd |
|
20 |
19
|
eqeq2d |
|
21 |
20
|
rexbidva |
|
22 |
21
|
rexbiia |
|
23 |
8 12 22
|
3bitri |
|