Step |
Hyp |
Ref |
Expression |
1 |
|
elreal |
|
2 |
|
elreal |
|
3 |
|
elreal |
|
4 |
|
breq1 |
|
5 |
4
|
anbi1d |
|
6 |
|
breq1 |
|
7 |
5 6
|
imbi12d |
|
8 |
|
breq2 |
|
9 |
|
breq1 |
|
10 |
8 9
|
anbi12d |
|
11 |
10
|
imbi1d |
|
12 |
|
breq2 |
|
13 |
12
|
anbi2d |
|
14 |
|
breq2 |
|
15 |
13 14
|
imbi12d |
|
16 |
|
ltresr |
|
17 |
|
ltresr |
|
18 |
|
ltsosr |
|
19 |
|
ltrelsr |
|
20 |
18 19
|
sotri |
|
21 |
16 17 20
|
syl2anb |
|
22 |
|
ltresr |
|
23 |
21 22
|
sylibr |
|
24 |
23
|
a1i |
|
25 |
1 2 3 7 11 15 24
|
3gencl |
|