Step |
Hyp |
Ref |
Expression |
1 |
|
brpprod3.1 |
|
2 |
|
brpprod3.2 |
|
3 |
|
brpprod3.3 |
|
4 |
|
pprodss4v |
|
5 |
4
|
brel |
|
6 |
5
|
simprd |
|
7 |
|
elvv |
|
8 |
6 7
|
sylib |
|
9 |
8
|
pm4.71ri |
|
10 |
|
19.41vv |
|
11 |
9 10
|
bitr4i |
|
12 |
|
breq2 |
|
13 |
12
|
pm5.32i |
|
14 |
13
|
2exbii |
|
15 |
|
vex |
|
16 |
|
vex |
|
17 |
1 2 15 16
|
brpprod |
|
18 |
17
|
anbi2i |
|
19 |
|
3anass |
|
20 |
18 19
|
bitr4i |
|
21 |
20
|
2exbii |
|
22 |
11 14 21
|
3bitri |
|