Step |
Hyp |
Ref |
Expression |
1 |
|
rngop.1 |
|
2 |
|
ralrnmpo.2 |
|
3 |
1
|
rnmpo |
|
4 |
3
|
raleqi |
|
5 |
|
eqeq1 |
|
6 |
5
|
2rexbidv |
|
7 |
6
|
ralab |
|
8 |
|
ralcom4 |
|
9 |
|
r19.23v |
|
10 |
9
|
albii |
|
11 |
8 10
|
bitr2i |
|
12 |
4 7 11
|
3bitri |
|
13 |
|
ralcom4 |
|
14 |
|
r19.23v |
|
15 |
14
|
albii |
|
16 |
13 15
|
bitri |
|
17 |
|
nfv |
|
18 |
17 2
|
ceqsalg |
|
19 |
18
|
ralimi |
|
20 |
|
ralbi |
|
21 |
19 20
|
syl |
|
22 |
16 21
|
bitr3id |
|
23 |
22
|
ralimi |
|
24 |
|
ralbi |
|
25 |
23 24
|
syl |
|
26 |
12 25
|
syl5bb |
|