Step |
Hyp |
Ref |
Expression |
1 |
|
utopustuq.1 |
|
2 |
|
fnresi |
|
3 |
|
fnsnfv |
|
4 |
2 3
|
mpan |
|
5 |
4
|
ad4antlr |
|
6 |
|
ustdiag |
|
7 |
6
|
ad5ant14 |
|
8 |
|
imass1 |
|
9 |
7 8
|
syl |
|
10 |
5 9
|
eqsstrd |
|
11 |
|
fvex |
|
12 |
11
|
snss |
|
13 |
10 12
|
sylibr |
|
14 |
|
fvresi |
|
15 |
14
|
eqcomd |
|
16 |
15
|
ad4antlr |
|
17 |
|
simpr |
|
18 |
13 16 17
|
3eltr4d |
|
19 |
1
|
ustuqtoplem |
|
20 |
19
|
elvd |
|
21 |
20
|
biimpa |
|
22 |
18 21
|
r19.29a |
|