Step |
Hyp |
Ref |
Expression |
1 |
|
iscfil |
|
2 |
|
xmetf |
|
3 |
2
|
ad3antrrr |
|
4 |
3
|
ffund |
|
5 |
|
filelss |
|
6 |
5
|
ad4ant24 |
|
7 |
|
xpss12 |
|
8 |
6 6 7
|
syl2anc |
|
9 |
3
|
fdmd |
|
10 |
8 9
|
sseqtrrd |
|
11 |
|
funimassov |
|
12 |
4 10 11
|
syl2anc |
|
13 |
|
0xr |
|
14 |
13
|
a1i |
|
15 |
|
simpllr |
|
16 |
15
|
rpxrd |
|
17 |
|
simp-4l |
|
18 |
6
|
sselda |
|
19 |
18
|
adantrr |
|
20 |
6
|
sselda |
|
21 |
20
|
adantrl |
|
22 |
|
xmetcl |
|
23 |
17 19 21 22
|
syl3anc |
|
24 |
|
xmetge0 |
|
25 |
17 19 21 24
|
syl3anc |
|
26 |
|
elico1 |
|
27 |
|
df-3an |
|
28 |
26 27
|
bitrdi |
|
29 |
28
|
baibd |
|
30 |
14 16 23 25 29
|
syl22anc |
|
31 |
30
|
2ralbidva |
|
32 |
12 31
|
bitrd |
|
33 |
32
|
rexbidva |
|
34 |
33
|
ralbidva |
|
35 |
34
|
pm5.32da |
|
36 |
1 35
|
bitrd |
|