Step |
Hyp |
Ref |
Expression |
1 |
|
df-colinear |
|
2 |
|
nnex |
|
3 |
|
fvex |
|
4 |
3 3
|
xpex |
|
5 |
4 3
|
xpex |
|
6 |
2 5
|
iunex |
|
7 |
|
df-oprab |
|
8 |
|
opelxpi |
|
9 |
8
|
3adant1 |
|
10 |
|
simp1 |
|
11 |
|
opelxpi |
|
12 |
9 10 11
|
syl2anc |
|
13 |
12
|
adantr |
|
14 |
13
|
reximi |
|
15 |
|
eliun |
|
16 |
14 15
|
sylibr |
|
17 |
|
eleq1 |
|
18 |
17
|
biimpar |
|
19 |
16 18
|
sylan2 |
|
20 |
19
|
exlimiv |
|
21 |
20
|
exlimivv |
|
22 |
21
|
abssi |
|
23 |
7 22
|
eqsstri |
|
24 |
6 23
|
ssexi |
|
25 |
24
|
cnvex |
|
26 |
1 25
|
eqeltri |
|