Step |
Hyp |
Ref |
Expression |
1 |
|
istrkg.p |
|
2 |
|
istrkg.d |
|
3 |
|
istrkg.i |
|
4 |
|
simpl |
|
5 |
4
|
eqcomd |
|
6 |
5
|
adantr |
|
7 |
6
|
difeq1d |
|
8 |
|
simpr |
|
9 |
8
|
eqcomd |
|
10 |
9
|
oveqd |
|
11 |
10
|
eleq2d |
|
12 |
9
|
oveqd |
|
13 |
12
|
eleq2d |
|
14 |
9
|
oveqd |
|
15 |
14
|
eleq2d |
|
16 |
11 13 15
|
3orbi123d |
|
17 |
5 16
|
rabeqbidv |
|
18 |
17
|
adantr |
|
19 |
5 7 18
|
mpoeq123dva |
|
20 |
19
|
eqeq2d |
|
21 |
1 3 20
|
sbcie2s |
|
22 |
|
fveqeq2 |
|
23 |
21 22
|
bitrd |
|
24 |
|
eqid |
|
25 |
23 24
|
elab4g |
|