Step |
Hyp |
Ref |
Expression |
1 |
|
ax-rrecex |
|
2 |
|
sn-inelr |
|
3 |
|
simplll |
|
4 |
|
simplrl |
|
5 |
|
simplrr |
|
6 |
3 4 5
|
remulinvcom |
|
7 |
6
|
oveq1d |
|
8 |
4
|
recnd |
|
9 |
3
|
recnd |
|
10 |
|
ax-icn |
|
11 |
10
|
a1i |
|
12 |
8 9 11
|
mulassd |
|
13 |
|
sn-1ticom |
|
14 |
|
it1ei |
|
15 |
13 14
|
eqtri |
|
16 |
15
|
a1i |
|
17 |
7 12 16
|
3eqtr3d |
|
18 |
|
simpr |
|
19 |
4 18
|
remulcld |
|
20 |
17 19
|
eqeltrrd |
|
21 |
20
|
ex |
|
22 |
2 21
|
mtoi |
|
23 |
1 22
|
rexlimddv |
|
24 |
23
|
ex |
|
25 |
24
|
necon4ad |
|
26 |
|
oveq1 |
|
27 |
|
sn-0tie0 |
|
28 |
|
0re |
|
29 |
27 28
|
eqeltri |
|
30 |
26 29
|
eqeltrdi |
|
31 |
25 30
|
impbid1 |
|