Step |
Hyp |
Ref |
Expression |
1 |
|
nnmword |
|
2 |
1
|
biimpd |
|
3 |
2
|
ex |
|
4 |
|
nnord |
|
5 |
|
ord0eln0 |
|
6 |
5
|
necon2bbid |
|
7 |
4 6
|
syl |
|
8 |
7
|
3ad2ant3 |
|
9 |
|
ssid |
|
10 |
|
nnm0r |
|
11 |
10
|
adantr |
|
12 |
|
nnm0r |
|
13 |
12
|
adantl |
|
14 |
11 13
|
sseq12d |
|
15 |
9 14
|
mpbiri |
|
16 |
|
oveq1 |
|
17 |
|
oveq1 |
|
18 |
16 17
|
sseq12d |
|
19 |
15 18
|
syl5ibrcom |
|
20 |
19
|
3adant3 |
|
21 |
8 20
|
sylbird |
|
22 |
21
|
a1dd |
|
23 |
3 22
|
pm2.61d |
|