Step |
Hyp |
Ref |
Expression |
1 |
|
mulgt0b2d.a |
|
2 |
|
mulgt0b2d.b |
|
3 |
|
mulgt0b2d.1 |
|
4 |
1
|
adantr |
|
5 |
2
|
adantr |
|
6 |
3
|
adantr |
|
7 |
|
simpr |
|
8 |
4 5 6 7
|
mulgt0d |
|
9 |
8
|
ex |
|
10 |
1
|
adantr |
|
11 |
|
1re |
|
12 |
|
rernegcl |
|
13 |
11 12
|
mp1i |
|
14 |
2 13
|
remulcld |
|
15 |
14
|
adantr |
|
16 |
3
|
adantr |
|
17 |
1
|
recnd |
|
18 |
2
|
recnd |
|
19 |
13
|
recnd |
|
20 |
17 18 19
|
mulassd |
|
21 |
20
|
breq1d |
|
22 |
21
|
biimpa |
|
23 |
10 15 16 22
|
mulgt0con2d |
|
24 |
23
|
ex |
|
25 |
1 2
|
remulcld |
|
26 |
|
relt0neg2 |
|
27 |
25 26
|
syl |
|
28 |
|
1red |
|
29 |
25 28
|
remulneg2d |
|
30 |
|
ax-1rid |
|
31 |
25 30
|
syl |
|
32 |
31
|
oveq2d |
|
33 |
29 32
|
eqtrd |
|
34 |
33
|
breq1d |
|
35 |
27 34
|
bitr4d |
|
36 |
|
relt0neg2 |
|
37 |
2 36
|
syl |
|
38 |
2 28
|
remulneg2d |
|
39 |
|
ax-1rid |
|
40 |
2 39
|
syl |
|
41 |
40
|
oveq2d |
|
42 |
38 41
|
eqtrd |
|
43 |
42
|
breq1d |
|
44 |
37 43
|
bitr4d |
|
45 |
24 35 44
|
3imtr4d |
|
46 |
9 45
|
impbid |
|