Step |
Hyp |
Ref |
Expression |
1 |
|
df-smo |
|
2 |
|
ralcom |
|
3 |
|
impexp |
|
4 |
|
simpr |
|
5 |
|
ordtr1 |
|
6 |
5
|
3impib |
|
7 |
6
|
3com23 |
|
8 |
|
simp3 |
|
9 |
7 8
|
jca |
|
10 |
9
|
3expia |
|
11 |
4 10
|
impbid2 |
|
12 |
11
|
imbi1d |
|
13 |
3 12
|
bitr3id |
|
14 |
13
|
ralbidv2 |
|
15 |
14
|
ralbidva |
|
16 |
2 15
|
syl5bb |
|
17 |
16
|
pm5.32i |
|
18 |
17
|
anbi2i |
|
19 |
|
3anass |
|
20 |
|
3anass |
|
21 |
18 19 20
|
3bitr4i |
|
22 |
1 21
|
bitri |
|