Step |
Hyp |
Ref |
Expression |
1 |
|
mulsproplem.1 |
|
2 |
|
mulsproplem4.1 |
|
3 |
|
mulsproplem4.2 |
|
4 |
|
oldssno |
|
5 |
4 2
|
sselid |
|
6 |
|
oldssno |
|
7 |
6 3
|
sselid |
|
8 |
|
0sno |
|
9 |
8
|
a1i |
|
10 |
|
bday0s |
|
11 |
10 10
|
oveq12i |
|
12 |
|
0elon |
|
13 |
|
naddrid |
|
14 |
12 13
|
ax-mp |
|
15 |
11 14
|
eqtri |
|
16 |
15 15
|
uneq12i |
|
17 |
|
un0 |
|
18 |
16 17
|
eqtri |
|
19 |
18 18
|
uneq12i |
|
20 |
19 17
|
eqtri |
|
21 |
20
|
uneq2i |
|
22 |
|
un0 |
|
23 |
21 22
|
eqtri |
|
24 |
|
oldbdayim |
|
25 |
2 24
|
syl |
|
26 |
|
oldbdayim |
|
27 |
3 26
|
syl |
|
28 |
|
bdayelon |
|
29 |
|
bdayelon |
|
30 |
|
naddel12 |
|
31 |
28 29 30
|
mp2an |
|
32 |
25 27 31
|
syl2anc |
|
33 |
|
elun1 |
|
34 |
32 33
|
syl |
|
35 |
23 34
|
eqeltrid |
|
36 |
1 5 7 9 9 9 9 35
|
mulsproplem1 |
|
37 |
36
|
simpld |
|