Step |
Hyp |
Ref |
Expression |
1 |
|
sbcal |
|
2 |
|
sbcal |
|
3 |
|
sbcim2g |
|
4 |
|
sbcg |
|
5 |
|
sbcel2gv |
|
6 |
|
sbcel2gv |
|
7 |
|
imbi13 |
|
8 |
4 5 6 7
|
syl3c |
|
9 |
3 8
|
bitrd |
|
10 |
|
pm3.31 |
|
11 |
|
pm3.3 |
|
12 |
10 11
|
impbii |
|
13 |
12
|
sbcbii |
|
14 |
|
pm3.31 |
|
15 |
|
pm3.3 |
|
16 |
14 15
|
impbii |
|
17 |
9 13 16
|
3bitr3g |
|
18 |
17
|
albidv |
|
19 |
2 18
|
syl5bb |
|
20 |
19
|
albidv |
|
21 |
1 20
|
syl5bb |
|
22 |
|
dftr2 |
|
23 |
22
|
sbcbii |
|
24 |
|
dftr2 |
|
25 |
21 23 24
|
3bitr4g |
|