Theorem ishlg 24647

Description: Rays : Definition 6.1 of [Schwabhauser] p. 43. With this definition, A ( K ` C ) B means that A and B are on the same ray with initial point C. This follows the same notation as Schwabhauser where rays are first defined as a relation. It is possible to recover the ray itself using e.g. ( ( K ` C ) " { A } ) (Contributed by Thierry Arnoux, 21-Dec-2019.)

Hypotheses

Ref	Expression
ishlg.p	|- P = ( Base ` G )
ishlg.i	|- I = (Itv ` G )
ishlg.k	|- K = (hlG ` G )
ishlg.a	|- ( ph -> A e. P )
ishlg.b	|- ( ph -> B e. P )
ishlg.c	|- ( ph -> C e. P )
ishlg.g	|- ( ph -> G e. V )

Assertion

Ref	Expression
ishlg	|- ( ph -> ( A ( K ` C ) B <-> ( A =/= C /\ B =/= C /\ ( A e. ( C I B ) \/ B e. ( C I A ) ) ) ) )

Proof of Theorem ishlg

Dummy variables a b c g are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		simpl 459	. . . . . 6 |- ( ( a = A /\ b = B ) -> a = A )
2	1	neeq1d 2683	. . . . 5 |- ( ( a = A /\ b = B ) -> ( a =/= C <-> A =/= C ) )
3		simpr 463	. . . . . 6 |- ( ( a = A /\ b = B ) -> b = B )
4	3	neeq1d 2683	. . . . 5 |- ( ( a = A /\ b = B ) -> ( b =/= C <-> B =/= C ) )
5	3	oveq2d 6306	. . . . . . 7 |- ( ( a = A /\ b = B ) -> ( C I b ) = ( C I B ) )
6	1, 5	eleq12d 2523	. . . . . 6 |- ( ( a = A /\ b = B ) -> ( a e. ( C I b ) <-> A e. ( C I B ) ) )
7	1	oveq2d 6306	. . . . . . 7 |- ( ( a = A /\ b = B ) -> ( C I a ) = ( C I A ) )
8	3, 7	eleq12d 2523	. . . . . 6 |- ( ( a = A /\ b = B ) -> ( b e. ( C I a ) <-> B e. ( C I A ) ) )
9	6, 8	orbi12d 716	. . . . 5 |- ( ( a = A /\ b = B ) -> ( ( a e. ( C I b ) \/ b e. ( C I a ) ) <-> ( A e. ( C I B ) \/ B e. ( C I A ) ) ) )
10	2, 4, 9	3anbi123d 1339	. . . 4 |- ( ( a = A /\ b = B ) -> ( ( a =/= C /\ b =/= C /\ ( a e. ( C I b ) \/ b e. ( C I a ) ) ) <-> ( A =/= C /\ B =/= C /\ ( A e. ( C I B ) \/ B e. ( C I A ) ) ) ) )
11		eqid 2451	. . . 4 |- { <. a , b >. | ( ( a e. P /\ b e. P ) /\ ( a =/= C /\ b =/= C /\ ( a e. ( C I b ) \/ b e. ( C I a ) ) ) ) } = { <. a , b >. | ( ( a e. P /\ b e. P ) /\ ( a =/= C /\ b =/= C /\ ( a e. ( C I b ) \/ b e. ( C I a ) ) ) ) }
12	10, 11	brab2a 4884	. . 3 |- ( A { <. a , b >. | ( ( a e. P /\ b e. P ) /\ ( a =/= C /\ b =/= C /\ ( a e. ( C I b ) \/ b e. ( C I a ) ) ) ) } B <-> ( ( A e. P /\ B e. P ) /\ ( A =/= C /\ B =/= C /\ ( A e. ( C I B ) \/ B e. ( C I A ) ) ) ) )
13	12	a1i 11	. 2 |- ( ph -> ( A { <. a , b >. | ( ( a e. P /\ b e. P ) /\ ( a =/= C /\ b =/= C /\ ( a e. ( C I b ) \/ b e. ( C I a ) ) ) ) } B <-> ( ( A e. P /\ B e. P ) /\ ( A =/= C /\ B =/= C /\ ( A e. ( C I B ) \/ B e. ( C I A ) ) ) ) ) )
14		ishlg.k	. . . . 5 |- K = (hlG ` G )
15		ishlg.g	. . . . . 6 |- ( ph -> G e. V )
16		elex 3054	. . . . . 6 |- ( G e. V -> G e. _V )
17		fveq2 5865	. . . . . . . . 9 |- ( g = G -> ( Base ` g ) = ( Base ` G ) )
18		ishlg.p	. . . . . . . . 9 |- P = ( Base ` G )
19	17, 18	syl6eqr 2503	. . . . . . . 8 |- ( g = G -> ( Base ` g ) = P )
20	19	eleq2d 2514	. . . . . . . . . . 11 |- ( g = G -> ( a e. ( Base ` g ) <-> a e. P ) )
21	19	eleq2d 2514	. . . . . . . . . . 11 |- ( g = G -> ( b e. ( Base ` g ) <-> b e. P ) )
22	20, 21	anbi12d 717	. . . . . . . . . 10 |- ( g = G -> ( ( a e. ( Base ` g ) /\ b e. ( Base ` g ) ) <-> ( a e. P /\ b e. P ) ) )
23		fveq2 5865	. . . . . . . . . . . . . . 15 |- ( g = G -> (Itv ` g ) = (Itv ` G ) )
24		ishlg.i	. . . . . . . . . . . . . . 15 |- I = (Itv ` G )
25	23, 24	syl6eqr 2503	. . . . . . . . . . . . . 14 |- ( g = G -> (Itv ` g ) = I )
26	25	oveqd 6307	. . . . . . . . . . . . 13 |- ( g = G -> ( c (Itv ` g ) b ) = ( c I b ) )
27	26	eleq2d 2514	. . . . . . . . . . . 12 |- ( g = G -> ( a e. ( c (Itv ` g ) b ) <-> a e. ( c I b ) ) )
28	25	oveqd 6307	. . . . . . . . . . . . 13 |- ( g = G -> ( c (Itv ` g ) a ) = ( c I a ) )
29	28	eleq2d 2514	. . . . . . . . . . . 12 |- ( g = G -> ( b e. ( c (Itv ` g ) a ) <-> b e. ( c I a ) ) )
30	27, 29	orbi12d 716	. . . . . . . . . . 11 |- ( g = G -> ( ( a e. ( c (Itv ` g ) b ) \/ b e. ( c (Itv ` g ) a ) ) <-> ( a e. ( c I b ) \/ b e. ( c I a ) ) ) )
31	30	3anbi3d 1345	. . . . . . . . . 10 |- ( g = G -> ( ( a =/= c /\ b =/= c /\ ( a e. ( c (Itv ` g ) b ) \/ b e. ( c (Itv ` g ) a ) ) ) <-> ( a =/= c /\ b =/= c /\ ( a e. ( c I b ) \/ b e. ( c I a ) ) ) ) )
32	22, 31	anbi12d 717	. . . . . . . . 9 |- ( g = G -> ( ( ( a e. ( Base ` g ) /\ b e. ( Base ` g ) ) /\ ( a =/= c /\ b =/= c /\ ( a e. ( c (Itv ` g ) b ) \/ b e. ( c (Itv ` g ) a ) ) ) ) <-> ( ( a e. P /\ b e. P ) /\ ( a =/= c /\ b =/= c /\ ( a e. ( c I b ) \/ b e. ( c I a ) ) ) ) ) )
33	32	opabbidv 4466	. . . . . . . 8 |- ( g = G -> { <. a , b >. | ( ( a e. ( Base ` g ) /\ b e. ( Base ` g ) ) /\ ( a =/= c /\ b =/= c /\ ( a e. ( c (Itv ` g ) b ) \/ b e. ( c (Itv ` g ) a ) ) ) ) } = { <. a , b >. | ( ( a e. P /\ b e. P ) /\ ( a =/= c /\ b =/= c /\ ( a e. ( c I b ) \/ b e. ( c I a ) ) ) ) } )
34	19, 33	mpteq12dv 4481	. . . . . . 7 |- ( g = G -> ( c e. ( Base ` g ) |-> { <. a , b >. | ( ( a e. ( Base ` g ) /\ b e. ( Base ` g ) ) /\ ( a =/= c /\ b =/= c /\ ( a e. ( c (Itv ` g ) b ) \/ b e. ( c (Itv ` g ) a ) ) ) ) } ) = ( c e. P |-> { <. a , b >. | ( ( a e. P /\ b e. P ) /\ ( a =/= c /\ b =/= c /\ ( a e. ( c I b ) \/ b e. ( c I a ) ) ) ) } ) )
35		df-hlg 24646	. . . . . . 7 |- hlG = ( g e. _V |-> ( c e. ( Base ` g ) |-> { <. a , b >. | ( ( a e. ( Base ` g ) /\ b e. ( Base ` g ) ) /\ ( a =/= c /\ b =/= c /\ ( a e. ( c (Itv ` g ) b ) \/ b e. ( c (Itv ` g ) a ) ) ) ) } ) )
36		fvex 5875	. . . . . . . . 9 |- ( Base ` G ) e. _V
37	18, 36	eqeltri 2525	. . . . . . . 8 |- P e. _V
38	37	mptex 6136	. . . . . . 7 |- ( c e. P |-> { <. a , b >. | ( ( a e. P /\ b e. P ) /\ ( a =/= c /\ b =/= c /\ ( a e. ( c I b ) \/ b e. ( c I a ) ) ) ) } ) e. _V
39	34, 35, 38	fvmpt 5948	. . . . . 6 |- ( G e. _V -> (hlG ` G ) = ( c e. P |-> { <. a , b >. | ( ( a e. P /\ b e. P ) /\ ( a =/= c /\ b =/= c /\ ( a e. ( c I b ) \/ b e. ( c I a ) ) ) ) } ) )
40	15, 16, 39	3syl 18	. . . . 5 |- ( ph -> (hlG ` G ) = ( c e. P |-> { <. a , b >. | ( ( a e. P /\ b e. P ) /\ ( a =/= c /\ b =/= c /\ ( a e. ( c I b ) \/ b e. ( c I a ) ) ) ) } ) )
41	14, 40	syl5eq 2497	. . . 4 |- ( ph -> K = ( c e. P |-> { <. a , b >. | ( ( a e. P /\ b e. P ) /\ ( a =/= c /\ b =/= c /\ ( a e. ( c I b ) \/ b e. ( c I a ) ) ) ) } ) )
42		neeq2 2687	. . . . . . . 8 |- ( c = C -> ( a =/= c <-> a =/= C ) )
43		neeq2 2687	. . . . . . . 8 |- ( c = C -> ( b =/= c <-> b =/= C ) )
44		oveq1 6297	. . . . . . . . . 10 |- ( c = C -> ( c I b ) = ( C I b ) )
45	44	eleq2d 2514	. . . . . . . . 9 |- ( c = C -> ( a e. ( c I b ) <-> a e. ( C I b ) ) )
46		oveq1 6297	. . . . . . . . . 10 |- ( c = C -> ( c I a ) = ( C I a ) )
47	46	eleq2d 2514	. . . . . . . . 9 |- ( c = C -> ( b e. ( c I a ) <-> b e. ( C I a ) ) )
48	45, 47	orbi12d 716	. . . . . . . 8 |- ( c = C -> ( ( a e. ( c I b ) \/ b e. ( c I a ) ) <-> ( a e. ( C I b ) \/ b e. ( C I a ) ) ) )
49	42, 43, 48	3anbi123d 1339	. . . . . . 7 |- ( c = C -> ( ( a =/= c /\ b =/= c /\ ( a e. ( c I b ) \/ b e. ( c I a ) ) ) <-> ( a =/= C /\ b =/= C /\ ( a e. ( C I b ) \/ b e. ( C I a ) ) ) ) )
50	49	anbi2d 710	. . . . . 6 |- ( c = C -> ( ( ( a e. P /\ b e. P ) /\ ( a =/= c /\ b =/= c /\ ( a e. ( c I b ) \/ b e. ( c I a ) ) ) ) <-> ( ( a e. P /\ b e. P ) /\ ( a =/= C /\ b =/= C /\ ( a e. ( C I b ) \/ b e. ( C I a ) ) ) ) ) )
51	50	opabbidv 4466	. . . . 5 |- ( c = C -> { <. a , b >. | ( ( a e. P /\ b e. P ) /\ ( a =/= c /\ b =/= c /\ ( a e. ( c I b ) \/ b e. ( c I a ) ) ) ) } = { <. a , b >. | ( ( a e. P /\ b e. P ) /\ ( a =/= C /\ b =/= C /\ ( a e. ( C I b ) \/ b e. ( C I a ) ) ) ) } )
52	51	adantl 468	. . . 4 |- ( ( ph /\ c = C ) -> { <. a , b >. | ( ( a e. P /\ b e. P ) /\ ( a =/= c /\ b =/= c /\ ( a e. ( c I b ) \/ b e. ( c I a ) ) ) ) } = { <. a , b >. | ( ( a e. P /\ b e. P ) /\ ( a =/= C /\ b =/= C /\ ( a e. ( C I b ) \/ b e. ( C I a ) ) ) ) } )
53		ishlg.c	. . . 4 |- ( ph -> C e. P )
54	37, 37	xpex 6595	. . . . . 6 |- ( P X. P ) e. _V
55		opabssxp 4909	. . . . . 6 |- { <. a , b >. | ( ( a e. P /\ b e. P ) /\ ( a =/= C /\ b =/= C /\ ( a e. ( C I b ) \/ b e. ( C I a ) ) ) ) } C_ ( P X. P )
56	54, 55	ssexi 4548	. . . . 5 |- { <. a , b >. | ( ( a e. P /\ b e. P ) /\ ( a =/= C /\ b =/= C /\ ( a e. ( C I b ) \/ b e. ( C I a ) ) ) ) } e. _V
57	56	a1i 11	. . . 4 |- ( ph -> { <. a , b >. | ( ( a e. P /\ b e. P ) /\ ( a =/= C /\ b =/= C /\ ( a e. ( C I b ) \/ b e. ( C I a ) ) ) ) } e. _V )
58	41, 52, 53, 57	fvmptd 5954	. . 3 |- ( ph -> ( K ` C ) = { <. a , b >. | ( ( a e. P /\ b e. P ) /\ ( a =/= C /\ b =/= C /\ ( a e. ( C I b ) \/ b e. ( C I a ) ) ) ) } )
59	58	breqd 4413	. 2 |- ( ph -> ( A ( K ` C ) B <-> A { <. a , b >. | ( ( a e. P /\ b e. P ) /\ ( a =/= C /\ b =/= C /\ ( a e. ( C I b ) \/ b e. ( C I a ) ) ) ) } B ) )
60		ishlg.a	. . . 4 |- ( ph -> A e. P )
61		ishlg.b	. . . 4 |- ( ph -> B e. P )
62	60, 61	jca 535	. . 3 |- ( ph -> ( A e. P /\ B e. P ) )
63	62	biantrurd 511	. 2 |- ( ph -> ( ( A =/= C /\ B =/= C /\ ( A e. ( C I B ) \/ B e. ( C I A ) ) ) <-> ( ( A e. P /\ B e. P ) /\ ( A =/= C /\ B =/= C /\ ( A e. ( C I B ) \/ B e. ( C I A ) ) ) ) ) )
64	13, 59, 63	3bitr4d 289	1 |- ( ph -> ( A ( K ` C ) B <-> ( A =/= C /\ B =/= C /\ ( A e. ( C I B ) \/ B e. ( C I A ) ) ) ) )

Syntax hints:   -> wi 4   <-> wb 188   \/ wo 370   /\ wa 371   /\ w3a 985   = wceq 1444   e. wcel 1887   =/= wne 2622   _Vcvv 3045   class class class wbr 4402   {copab 4460   |-> cmpt 4461   X. cxp 4832   ` cfv 5582  (class class class)co 6290   Basecbs 15121  Itvcitv 24484  hlGchlg 24645

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1669  ax-4 1682  ax-5 1758  ax-6 1805  ax-7 1851  ax-8 1889  ax-9 1896  ax-10 1915  ax-11 1920  ax-12 1933  ax-13 2091  ax-ext 2431  ax-rep 4515  ax-sep 4525  ax-nul 4534  ax-pow 4581  ax-pr 4639  ax-un 6583

This theorem depends on definitions:  df-bi 189  df-or 372  df-an 373  df-3an 987  df-tru 1447  df-ex 1664  df-nf 1668  df-sb 1798  df-eu 2303  df-mo 2304  df-clab 2438  df-cleq 2444  df-clel 2447  df-nfc 2581  df-ne 2624  df-ral 2742  df-rex 2743  df-reu 2744  df-rab 2746  df-v 3047  df-sbc 3268  df-csb 3364  df-dif 3407  df-un 3409  df-in 3411  df-ss 3418  df-nul 3732  df-if 3882  df-pw 3953  df-sn 3969  df-pr 3971  df-op 3975  df-uni 4199  df-iun 4280  df-br 4403  df-opab 4462  df-mpt 4463  df-id 4749  df-xp 4840  df-rel 4841  df-cnv 4842  df-co 4843  df-dm 4844  df-rn 4845  df-res 4846  df-ima 4847  df-iota 5546  df-fun 5584  df-fn 5585  df-f 5586  df-f1 5587  df-fo 5588  df-f1o 5589  df-fv 5590  df-ov 6293  df-hlg 24646

This theorem is referenced by:  hlcomb  24648  hlne1  24650  hlne2  24651  hlln  24652  hlid  24654  hltr  24655  hlbtwn  24656  btwnhl1  24657  btwnhl2  24658  btwnhl  24659  lnhl  24660  hlcgrex  24661  mirhl  24724  mirbtwnhl  24725  mirhl2  24726  hlperpnel  24767  opphllem4  24792  opphl  24796  hlpasch  24798  lnopp2hpgb  24805  cgracgr  24860  cgraswap  24862  cgrahl  24868  cgracol  24869