Description: The colinear predicate exists. (Contributed by Scott Fenton, 25-Oct-2013) (Revised by Mario Carneiro, 19-Apr-2014)
Ref | Expression | ||
---|---|---|---|
Assertion | colinearex | |
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 | |