Step |
Hyp |
Ref |
Expression |
1 |
|
idlval.1 |
|
2 |
|
idlval.2 |
|
3 |
|
idlval.3 |
|
4 |
|
idlval.4 |
|
5 |
|
crngorngo |
|
6 |
1 2 3 4
|
isidl |
|
7 |
5 6
|
syl |
|
8 |
|
ssel2 |
|
9 |
1 2 3
|
crngocom |
|
10 |
9
|
eleq1d |
|
11 |
10
|
biimprd |
|
12 |
11
|
3expa |
|
13 |
12
|
pm4.71d |
|
14 |
13
|
bicomd |
|
15 |
14
|
ralbidva |
|
16 |
15
|
anbi2d |
|
17 |
8 16
|
sylan2 |
|
18 |
17
|
anassrs |
|
19 |
18
|
ralbidva |
|
20 |
19
|
adantrr |
|
21 |
20
|
pm5.32da |
|
22 |
|
df-3an |
|
23 |
|
df-3an |
|
24 |
21 22 23
|
3bitr4g |
|
25 |
7 24
|
bitrd |
|