Step |
Hyp |
Ref |
Expression |
1 |
|
ef11d.a |
|
2 |
|
ef11d.b |
|
3 |
1 2
|
efsubd |
|
4 |
3
|
eqeq1d |
|
5 |
|
ax-icn |
|
6 |
5
|
a1i |
|
7 |
|
2cnd |
|
8 |
|
picn |
|
9 |
8
|
a1i |
|
10 |
7 9
|
mulcld |
|
11 |
6 10
|
mulcld |
|
12 |
1 2
|
subcld |
|
13 |
|
ine0 |
|
14 |
13
|
a1i |
|
15 |
|
2ne0 |
|
16 |
15
|
a1i |
|
17 |
|
pine0 |
|
18 |
17
|
a1i |
|
19 |
7 9 16 18
|
mulne0d |
|
20 |
6 10 14 19
|
mulne0d |
|
21 |
11 12 20
|
zdivgd |
|
22 |
|
eqcom |
|
23 |
2
|
adantr |
|
24 |
11
|
adantr |
|
25 |
|
zcn |
|
26 |
25
|
adantl |
|
27 |
24 26
|
mulcld |
|
28 |
1
|
adantr |
|
29 |
23 27 28
|
addrsub |
|
30 |
22 29
|
bitrid |
|
31 |
30
|
rexbidva |
|
32 |
|
efeq1 |
|
33 |
12 32
|
syl |
|
34 |
21 31 33
|
3bitr4rd |
|
35 |
1
|
efcld |
|
36 |
2
|
efcld |
|
37 |
2
|
efne0d |
|
38 |
35 36 37
|
diveq1ad |
|
39 |
4 34 38
|
3bitr3rd |
|