Step |
Hyp |
Ref |
Expression |
1 |
|
xrge0infssd.1 |
|
2 |
|
xrge0infssd.2 |
|
3 |
|
iccssxr |
|
4 |
|
xrltso |
|
5 |
|
soss |
|
6 |
3 4 5
|
mp2 |
|
7 |
6
|
a1i |
|
8 |
|
xrge0infss |
|
9 |
2 8
|
syl |
|
10 |
7 9
|
infcl |
|
11 |
3 10
|
sseldi |
|
12 |
1 2
|
sstrd |
|
13 |
|
xrge0infss |
|
14 |
12 13
|
syl |
|
15 |
7 14
|
infcl |
|
16 |
3 15
|
sseldi |
|
17 |
7 1 14 9
|
infssd |
|
18 |
11 16 17
|
xrnltled |
|