Step |
Hyp |
Ref |
Expression |
1 |
|
sge0iun.a |
|
2 |
|
sge0iun.b |
|
3 |
|
sge0iun.x |
|
4 |
|
sge0iun.f |
|
5 |
|
sge0iun.dj |
|
6 |
4
|
adantr |
|
7 |
6
|
3adant3 |
|
8 |
|
ssiun2 |
|
9 |
8
|
adantl |
|
10 |
3
|
eqcomi |
|
11 |
9 10
|
sseqtrdi |
|
12 |
11
|
3adant3 |
|
13 |
|
simp3 |
|
14 |
12 13
|
sseldd |
|
15 |
7 14
|
ffvelrnd |
|
16 |
1 2 5 15
|
sge0iunmpt |
|
17 |
3
|
feq2i |
|
18 |
17
|
a1i |
|
19 |
4 18
|
mpbid |
|
20 |
19
|
feqmptd |
|
21 |
20
|
fveq2d |
|
22 |
6 11
|
fssresd |
|
23 |
22
|
feqmptd |
|
24 |
|
fvres |
|
25 |
24
|
mpteq2ia |
|
26 |
25
|
a1i |
|
27 |
23 26
|
eqtrd |
|
28 |
27
|
fveq2d |
|
29 |
28
|
mpteq2dva |
|
30 |
29
|
fveq2d |
|
31 |
16 21 30
|
3eqtr4d |
|