Step |
Hyp |
Ref |
Expression |
1 |
|
oddinmgm.e |
|
2 |
|
halfnz |
|
3 |
|
eleq1 |
|
4 |
2 3
|
mtbii |
|
5 |
4
|
con2i |
|
6 |
|
1cnd |
|
7 |
|
zcn |
|
8 |
|
2cnd |
|
9 |
|
2ne0 |
|
10 |
9
|
a1i |
|
11 |
6 7 8 10
|
divmul2d |
|
12 |
5 11
|
mtbid |
|
13 |
|
eqcom |
|
14 |
13
|
a1i |
|
15 |
8 7
|
mulcld |
|
16 |
|
subadd2 |
|
17 |
16
|
bicomd |
|
18 |
8 6 15 17
|
syl3anc |
|
19 |
|
2m1e1 |
|
20 |
19
|
a1i |
|
21 |
20
|
eqeq1d |
|
22 |
14 18 21
|
3bitrd |
|
23 |
12 22
|
mtbird |
|
24 |
23
|
nrex |
|
25 |
24
|
intnan |
|
26 |
|
eqeq1 |
|
27 |
26
|
rexbidv |
|
28 |
27 1
|
elrab2 |
|
29 |
25 28
|
mtbir |
|
30 |
29
|
nelir |
|