Step |
Hyp |
Ref |
Expression |
1 |
|
infdesc.x |
|
2 |
|
infdesc.z |
|
3 |
|
infdesc.s |
|
4 |
|
infdesc.1 |
|
5 |
|
df-ne |
|
6 |
|
ssrab2 |
|
7 |
6 3
|
sstrid |
|
8 |
|
uzwo |
|
9 |
7 8
|
sylan |
|
10 |
1
|
elrab |
|
11 |
|
uzssre |
|
12 |
3 11
|
sstrdi |
|
13 |
12
|
adantr |
|
14 |
13
|
sselda |
|
15 |
12
|
sselda |
|
16 |
15
|
adantr |
|
17 |
14 16
|
ltnled |
|
18 |
17
|
anbi2d |
|
19 |
18
|
rexbidva |
|
20 |
19
|
adantrr |
|
21 |
4 20
|
mpbid |
|
22 |
10 21
|
sylan2b |
|
23 |
2
|
rexrab |
|
24 |
22 23
|
sylibr |
|
25 |
24
|
ralrimiva |
|
26 |
|
rexnal |
|
27 |
26
|
ralbii |
|
28 |
|
ralnex |
|
29 |
27 28
|
bitri |
|
30 |
25 29
|
sylib |
|
31 |
30
|
adantr |
|
32 |
9 31
|
pm2.21dd |
|
33 |
5 32
|
sylan2br |
|
34 |
33
|
pm2.18da |
|