Step |
Hyp |
Ref |
Expression |
1 |
|
ef0 |
|
2 |
1
|
eqeq2i |
|
3 |
|
imcl |
|
4 |
3
|
renegcld |
|
5 |
|
0re |
|
6 |
|
reef11 |
|
7 |
4 5 6
|
sylancl |
|
8 |
2 7
|
bitr3id |
|
9 |
3
|
recnd |
|
10 |
9
|
negeq0d |
|
11 |
8 10
|
bitr4d |
|
12 |
|
ax-icn |
|
13 |
|
mulcl |
|
14 |
12 13
|
mpan |
|
15 |
|
absef |
|
16 |
14 15
|
syl |
|
17 |
|
recl |
|
18 |
17
|
recnd |
|
19 |
|
mulcl |
|
20 |
12 9 19
|
sylancr |
|
21 |
|
replim |
|
22 |
18 20 21
|
comraddd |
|
23 |
22
|
oveq2d |
|
24 |
|
adddi |
|
25 |
12 20 18 24
|
mp3an2i |
|
26 |
|
ixi |
|
27 |
26
|
oveq1i |
|
28 |
|
mulass |
|
29 |
12 12 9 28
|
mp3an12i |
|
30 |
9
|
mulm1d |
|
31 |
27 29 30
|
3eqtr3a |
|
32 |
31
|
oveq1d |
|
33 |
25 32
|
eqtrd |
|
34 |
23 33
|
eqtrd |
|
35 |
34
|
fveq2d |
|
36 |
4 17
|
crred |
|
37 |
35 36
|
eqtrd |
|
38 |
37
|
fveq2d |
|
39 |
16 38
|
eqtrd |
|
40 |
39
|
eqeq1d |
|
41 |
|
reim0b |
|
42 |
11 40 41
|
3bitr4rd |
|