Step |
Hyp |
Ref |
Expression |
1 |
|
enp1i.1 |
|
2 |
|
enp1i.2 |
|
3 |
|
enp1i.3 |
|
4 |
|
enp1i.4 |
|
5 |
|
nsuceq0 |
|
6 |
|
breq1 |
|
7 |
|
ensym |
|
8 |
|
en0 |
|
9 |
7 8
|
sylib |
|
10 |
2 9
|
eqtr3id |
|
11 |
6 10
|
syl6bi |
|
12 |
11
|
necon3ad |
|
13 |
5 12
|
mpi |
|
14 |
13
|
con2i |
|
15 |
|
neq0 |
|
16 |
14 15
|
sylib |
|
17 |
2
|
breq2i |
|
18 |
|
dif1en |
|
19 |
1 18
|
mp3an1 |
|
20 |
19 3
|
syl |
|
21 |
20
|
ex |
|
22 |
17 21
|
sylbi |
|
23 |
22 4
|
sylcom |
|
24 |
23
|
eximdv |
|
25 |
16 24
|
mpd |
|