Step |
Hyp |
Ref |
Expression |
1 |
|
19.26-2 |
|
2 |
|
pm4.38 |
|
3 |
2
|
biimpd |
|
4 |
|
sban |
|
5 |
4
|
sbbii |
|
6 |
|
sban |
|
7 |
5 6
|
bitri |
|
8 |
|
sban |
|
9 |
8
|
sbbii |
|
10 |
|
sban |
|
11 |
9 10
|
bitri |
|
12 |
3 7 11
|
3imtr4g |
|
13 |
12
|
2alimi |
|
14 |
|
bicom1 |
|
15 |
|
bicom1 |
|
16 |
14 15
|
bi2anan9 |
|
17 |
16
|
biimpd |
|
18 |
17 11 7
|
3imtr4g |
|
19 |
18
|
2alimi |
|
20 |
13 19
|
jca |
|
21 |
1 20
|
sylbir |
|
22 |
|
2albiim |
|
23 |
21 22
|
sylibr |
|
24 |
|
dfich2 |
|
25 |
|
dfich2 |
|
26 |
24 25
|
anbi12i |
|
27 |
|
dfich2 |
|
28 |
23 26 27
|
3imtr4i |
|