Step |
Hyp |
Ref |
Expression |
1 |
|
elznn0 |
|
2 |
|
jm2.19lem3 |
|
3 |
2
|
3expia |
|
4 |
3
|
adantr |
|
5 |
|
simplll |
|
6 |
|
simprl |
|
7 |
6
|
ad2antrr |
|
8 |
|
simprr |
|
9 |
8
|
ad2antrr |
|
10 |
|
nn0z |
|
11 |
10
|
adantl |
|
12 |
|
simplr |
|
13 |
12
|
recnd |
|
14 |
|
znegclb |
|
15 |
13 14
|
syl |
|
16 |
11 15
|
mpbird |
|
17 |
16 7
|
zmulcld |
|
18 |
9 17
|
zaddcld |
|
19 |
|
simpr |
|
20 |
|
jm2.19lem3 |
|
21 |
5 7 18 19 20
|
syl121anc |
|
22 |
|
zcn |
|
23 |
22
|
ad2antrl |
|
24 |
23
|
ad2antrr |
|
25 |
13 24
|
mulneg1d |
|
26 |
25
|
oveq2d |
|
27 |
|
zcn |
|
28 |
27
|
ad2antll |
|
29 |
28
|
ad2antrr |
|
30 |
13 24
|
mulcld |
|
31 |
29 30
|
addcld |
|
32 |
31 30
|
negsubd |
|
33 |
29 30
|
pncand |
|
34 |
26 32 33
|
3eqtrd |
|
35 |
34
|
oveq2d |
|
36 |
35
|
breq2d |
|
37 |
21 36
|
bitr2d |
|
38 |
37
|
ex |
|
39 |
4 38
|
jaod |
|
40 |
39
|
expimpd |
|
41 |
1 40
|
syl5bi |
|
42 |
41
|
3impia |
|