Step |
Hyp |
Ref |
Expression |
1 |
|
negsproplem.1 |
|
2 |
|
negsproplem4.1 |
|
3 |
|
negsproplem4.2 |
|
4 |
|
negsproplem4.3 |
|
5 |
|
negsproplem4.4 |
|
6 |
|
uncom |
|
7 |
6
|
eleq2i |
|
8 |
7
|
imbi1i |
|
9 |
8
|
2ralbii |
|
10 |
1 9
|
sylib |
|
11 |
10 3
|
negsproplem3 |
|
12 |
11
|
simp3d |
|
13 |
|
fvex |
|
14 |
13
|
snid |
|
15 |
14
|
a1i |
|
16 |
|
negsfn |
|
17 |
|
leftssno |
|
18 |
|
bdayelon |
|
19 |
|
oldbday |
|
20 |
18 2 19
|
sylancr |
|
21 |
5 20
|
mpbird |
|
22 |
|
breq1 |
|
23 |
|
leftval |
|
24 |
22 23
|
elrab2 |
|
25 |
21 4 24
|
sylanbrc |
|
26 |
|
fnfvima |
|
27 |
16 17 25 26
|
mp3an12i |
|
28 |
12 15 27
|
ssltsepcd |
|