Step |
Hyp |
Ref |
Expression |
1 |
|
relcnv |
|
2 |
|
dmtpos |
|
3 |
2
|
releqd |
|
4 |
1 3
|
mpbiri |
|
5 |
|
reltpos |
|
6 |
4 5
|
jctil |
|
7 |
|
relrelss |
|
8 |
6 7
|
sylib |
|
9 |
8
|
sseld |
|
10 |
|
elvvv |
|
11 |
9 10
|
syl6ib |
|
12 |
11
|
pm4.71rd |
|
13 |
|
19.41vvv |
|
14 |
|
eleq1 |
|
15 |
|
df-br |
|
16 |
|
brtpos |
|
17 |
16
|
elv |
|
18 |
15 17
|
bitr3i |
|
19 |
14 18
|
bitrdi |
|
20 |
19
|
pm5.32i |
|
21 |
20
|
3exbii |
|
22 |
13 21
|
bitr3i |
|
23 |
12 22
|
bitrdi |
|
24 |
23
|
abbi2dv |
|
25 |
|
df-oprab |
|
26 |
24 25
|
eqtr4di |
|