Description: Transfer law for colinearity. Theorem 4.13 of Schwabhauser p. 37. (Contributed by Scott Fenton, 5-Oct-2013)
Ref | Expression | ||
---|---|---|---|
Assertion | colinearxfr | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | btwnxfr | |
|
2 | 1 | expcomd | |
3 | 2 | imp | |
4 | cgr3permute4 | |
|
5 | biid | |
|
6 | 3anrot | |
|
7 | 3anrot | |
|
8 | btwnxfr | |
|
9 | 5 6 7 8 | syl3anbr | |
10 | 9 | expcomd | |
11 | 4 10 | sylbid | |
12 | 11 | imp | |
13 | cgr3permute3 | |
|
14 | 3anrot | |
|
15 | 3anrot | |
|
16 | btwnxfr | |
|
17 | 5 14 15 16 | syl3anb | |
18 | 17 | expcomd | |
19 | 13 18 | sylbid | |
20 | 19 | imp | |
21 | 3 12 20 | 3orim123d | |
22 | simp1 | |
|
23 | simp22 | |
|
24 | simp21 | |
|
25 | simp23 | |
|
26 | brcolinear | |
|
27 | 22 23 24 25 26 | syl13anc | |
28 | 27 | adantr | |
29 | simp32 | |
|
30 | simp31 | |
|
31 | simp33 | |
|
32 | brcolinear | |
|
33 | 22 29 30 31 32 | syl13anc | |
34 | 33 | adantr | |
35 | 21 28 34 | 3imtr4d | |
36 | 35 | ex | |
37 | 36 | com23 | |
38 | 37 | impd | |