Step |
Hyp |
Ref |
Expression |
1 |
|
israg.p |
|- P = ( Base ` G ) |
2 |
|
israg.d |
|- .- = ( dist ` G ) |
3 |
|
israg.i |
|- I = ( Itv ` G ) |
4 |
|
israg.l |
|- L = ( LineG ` G ) |
5 |
|
israg.s |
|- S = ( pInvG ` G ) |
6 |
|
israg.g |
|- ( ph -> G e. TarskiG ) |
7 |
|
israg.a |
|- ( ph -> A e. P ) |
8 |
|
israg.b |
|- ( ph -> B e. P ) |
9 |
|
israg.c |
|- ( ph -> C e. P ) |
10 |
|
ragcom.1 |
|- ( ph -> <" A B C "> e. ( raG ` G ) ) |
11 |
|
eqid |
|- ( S ` B ) = ( S ` B ) |
12 |
1 2 3 4 5 6 8 11 9
|
mircl |
|- ( ph -> ( ( S ` B ) ` C ) e. P ) |
13 |
1 2 3 4 5 6 7 8 9
|
israg |
|- ( ph -> ( <" A B C "> e. ( raG ` G ) <-> ( A .- C ) = ( A .- ( ( S ` B ) ` C ) ) ) ) |
14 |
10 13
|
mpbid |
|- ( ph -> ( A .- C ) = ( A .- ( ( S ` B ) ` C ) ) ) |
15 |
1 2 3 6 7 9 7 12 14
|
tgcgrcomlr |
|- ( ph -> ( C .- A ) = ( ( ( S ` B ) ` C ) .- A ) ) |
16 |
1 2 3 4 5 6 8 11 12 7
|
miriso |
|- ( ph -> ( ( ( S ` B ) ` ( ( S ` B ) ` C ) ) .- ( ( S ` B ) ` A ) ) = ( ( ( S ` B ) ` C ) .- A ) ) |
17 |
1 2 3 4 5 6 8 11 9
|
mirmir |
|- ( ph -> ( ( S ` B ) ` ( ( S ` B ) ` C ) ) = C ) |
18 |
17
|
oveq1d |
|- ( ph -> ( ( ( S ` B ) ` ( ( S ` B ) ` C ) ) .- ( ( S ` B ) ` A ) ) = ( C .- ( ( S ` B ) ` A ) ) ) |
19 |
15 16 18
|
3eqtr2d |
|- ( ph -> ( C .- A ) = ( C .- ( ( S ` B ) ` A ) ) ) |
20 |
1 2 3 4 5 6 9 8 7
|
israg |
|- ( ph -> ( <" C B A "> e. ( raG ` G ) <-> ( C .- A ) = ( C .- ( ( S ` B ) ` A ) ) ) ) |
21 |
19 20
|
mpbird |
|- ( ph -> <" C B A "> e. ( raG ` G ) ) |