Step |
Hyp |
Ref |
Expression |
1 |
|
inelr |
|
2 |
|
ax-icn |
|
3 |
2
|
a1i |
|
4 |
|
simpll |
|
5 |
4
|
recnd |
|
6 |
|
simplr |
|
7 |
3 5 6
|
divcan4d |
|
8 |
|
simpr |
|
9 |
8 4 6
|
redivcld |
|
10 |
7 9
|
eqeltrrd |
|
11 |
10
|
ex |
|
12 |
1 11
|
mtoi |
|
13 |
12
|
ex |
|
14 |
13
|
necon4ad |
|
15 |
|
oveq2 |
|
16 |
|
it0e0 |
|
17 |
|
0re |
|
18 |
16 17
|
eqeltri |
|
19 |
15 18
|
eqeltrdi |
|
20 |
14 19
|
impbid1 |
|