Step |
Hyp |
Ref |
Expression |
1 |
|
ntrnei.o |
|
2 |
|
ntrnei.f |
|
3 |
|
ntrnei.r |
|
4 |
|
eqss |
|
5 |
4
|
a1i |
|
6 |
1 2 3
|
ntrneiiex |
|
7 |
|
elmapi |
|
8 |
6 7
|
syl |
|
9 |
8
|
ffvelrnda |
|
10 |
9
|
elpwid |
|
11 |
10
|
adantr |
|
12 |
8
|
ffvelrnda |
|
13 |
12
|
elpwid |
|
14 |
13
|
adantlr |
|
15 |
11 14
|
unssd |
|
16 |
15
|
biantrurd |
|
17 |
|
dfss3 |
|
18 |
|
elun |
|
19 |
18
|
ralbii |
|
20 |
17 19
|
bitri |
|
21 |
20
|
a1i |
|
22 |
5 16 21
|
3bitr2d |
|
23 |
22
|
imbi2d |
|
24 |
|
r19.21v |
|
25 |
24
|
a1i |
|
26 |
3
|
ad3antrrr |
|
27 |
|
simpr |
|
28 |
|
simpllr |
|
29 |
1 2 26 27 28
|
ntrneiel |
|
30 |
|
simplr |
|
31 |
1 2 26 27 30
|
ntrneiel |
|
32 |
29 31
|
orbi12d |
|
33 |
32
|
imbi2d |
|
34 |
33
|
ralbidva |
|
35 |
23 25 34
|
3bitr2d |
|
36 |
35
|
ralbidva |
|
37 |
36
|
ralbidva |
|
38 |
|
ralrot3 |
|
39 |
37 38
|
syl6bb |
|