Step |
Hyp |
Ref |
Expression |
1 |
|
usgrexi.p |
|
2 |
1
|
usgrexilem |
|
3 |
1
|
cusgrexilem1 |
|
4 |
|
opiedgfv |
|
5 |
3 4
|
mpdan |
|
6 |
5
|
dmeqd |
|
7 |
|
opvtxfv |
|
8 |
3 7
|
mpdan |
|
9 |
8
|
pweqd |
|
10 |
9
|
rabeqdv |
|
11 |
5 6 10
|
f1eq123d |
|
12 |
2 11
|
mpbird |
|
13 |
|
opex |
|
14 |
|
eqid |
|
15 |
|
eqid |
|
16 |
14 15
|
isusgrs |
|
17 |
13 16
|
mp1i |
|
18 |
12 17
|
mpbird |
|