Step |
Hyp |
Ref |
Expression |
1 |
|
mulsproplem.1 |
|
2 |
|
mulsproplem2.1 |
|
3 |
|
mulsproplem2.2 |
|
4 |
|
oldssno |
|
5 |
4 2
|
sselid |
|
6 |
|
0sno |
|
7 |
6
|
a1i |
|
8 |
|
bday0s |
|
9 |
8 8
|
oveq12i |
|
10 |
|
0elon |
|
11 |
|
naddrid |
|
12 |
10 11
|
ax-mp |
|
13 |
9 12
|
eqtri |
|
14 |
13 13
|
uneq12i |
|
15 |
|
un0 |
|
16 |
14 15
|
eqtri |
|
17 |
16 16
|
uneq12i |
|
18 |
17 15
|
eqtri |
|
19 |
18
|
uneq2i |
|
20 |
|
un0 |
|
21 |
19 20
|
eqtri |
|
22 |
|
oldbdayim |
|
23 |
2 22
|
syl |
|
24 |
|
bdayelon |
|
25 |
|
bdayelon |
|
26 |
|
bdayelon |
|
27 |
|
naddel1 |
|
28 |
24 25 26 27
|
mp3an |
|
29 |
23 28
|
sylib |
|
30 |
|
elun1 |
|
31 |
29 30
|
syl |
|
32 |
21 31
|
eqeltrid |
|
33 |
1 5 3 7 7 7 7 32
|
mulsproplem1 |
|
34 |
33
|
simpld |
|