Theorem tgbtwncom 28828

Description: Betweenness commutes. Theorem 3.2 of [Schwabhauser] p. 30. (Contributed by Thierry Arnoux, 15-Mar-2019.)

Hypotheses

Ref	Expression
tkgeom.p	⊢ 𝑃 = (Base‘𝐺)
tkgeom.d	⊢ − = (dist‘𝐺)
tkgeom.i	⊢ 𝐼 = (Itv‘𝐺)
tkgeom.g	⊢ (𝜑 → 𝐺 ∈ TarskiG)
tgbtwntriv2.1	⊢ (𝜑 → 𝐴 ∈ 𝑃)
tgbtwntriv2.2	⊢ (𝜑 → 𝐵 ∈ 𝑃)
tgbtwncom.3	⊢ (𝜑 → 𝐶 ∈ 𝑃)
tgbtwncom.4	⊢ (𝜑 → 𝐵 ∈ (𝐴𝐼𝐶))

Assertion

Ref	Expression
tgbtwncom	⊢ (𝜑 → 𝐵 ∈ (𝐶𝐼𝐴))

Proof of Theorem tgbtwncom

Dummy variable 𝑥 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		tkgeom.p	. . . 4 ⊢ 𝑃 = (Base‘𝐺)
2		tkgeom.d	. . . 4 ⊢ − = (dist‘𝐺)
3		tkgeom.i	. . . 4 ⊢ 𝐼 = (Itv‘𝐺)
4		tkgeom.g	. . . . 5 ⊢ (𝜑 → 𝐺 ∈ TarskiG)
5	4	ad2antrr 739	. . . 4 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝑃) ∧ (𝑥 ∈ (𝐵𝐼𝐵) ∧ 𝑥 ∈ (𝐶𝐼𝐴))) → 𝐺 ∈ TarskiG)
6		tgbtwntriv2.2	. . . . 5 ⊢ (𝜑 → 𝐵 ∈ 𝑃)
7	6	ad2antrr 739	. . . 4 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝑃) ∧ (𝑥 ∈ (𝐵𝐼𝐵) ∧ 𝑥 ∈ (𝐶𝐼𝐴))) → 𝐵 ∈ 𝑃)
8		simplr 781	. . . 4 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝑃) ∧ (𝑥 ∈ (𝐵𝐼𝐵) ∧ 𝑥 ∈ (𝐶𝐼𝐴))) → 𝑥 ∈ 𝑃)
9		simprl 783	. . . 4 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝑃) ∧ (𝑥 ∈ (𝐵𝐼𝐵) ∧ 𝑥 ∈ (𝐶𝐼𝐴))) → 𝑥 ∈ (𝐵𝐼𝐵))
10	1, 2, 3, 5, 7, 8, 9	axtgbtwnid 28805	. . 3 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝑃) ∧ (𝑥 ∈ (𝐵𝐼𝐵) ∧ 𝑥 ∈ (𝐶𝐼𝐴))) → 𝐵 = 𝑥)
11		simprr 785	. . 3 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝑃) ∧ (𝑥 ∈ (𝐵𝐼𝐵) ∧ 𝑥 ∈ (𝐶𝐼𝐴))) → 𝑥 ∈ (𝐶𝐼𝐴))
12	10, 11	eqeltrd 2862	. 2 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝑃) ∧ (𝑥 ∈ (𝐵𝐼𝐵) ∧ 𝑥 ∈ (𝐶𝐼𝐴))) → 𝐵 ∈ (𝐶𝐼𝐴))
13		tgbtwntriv2.1	. . 3 ⊢ (𝜑 → 𝐴 ∈ 𝑃)
14		tgbtwncom.3	. . 3 ⊢ (𝜑 → 𝐶 ∈ 𝑃)
15		tgbtwncom.4	. . 3 ⊢ (𝜑 → 𝐵 ∈ (𝐴𝐼𝐶))
16	1, 2, 3, 4, 6, 14	tgbtwntriv2 28827	. . 3 ⊢ (𝜑 → 𝐶 ∈ (𝐵𝐼𝐶))
17	1, 2, 3, 4, 13, 6, 14, 6, 14, 15, 16	axtgpasch 28806	. 2 ⊢ (𝜑 → ∃𝑥 ∈ 𝑃 (𝑥 ∈ (𝐵𝐼𝐵) ∧ 𝑥 ∈ (𝐶𝐼𝐴)))
18	12, 17	r19.29a 3172	1 ⊢ (𝜑 → 𝐵 ∈ (𝐶𝐼𝐴))

This proof depends on syntax axioms:   → wi 4   ∧ wa 401   = wceq 1570   ∈ wcel 2145  ‘cfv 6537  (class class class)co 7416  Basecbs 17305  distcds 17355  TarskiGcstrkg 28766  Itvcitv 28772

This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1943  ax-6 2000  ax-7 2041  ax-8 2147  ax-9 2155  ax-ext 2734  ax-nul 5267

This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-sb 2100  df-clab 2741  df-cleq 2754  df-clel 2837  df-ne 2958  df-ral 3079  df-rex 3089  df-rab 3415  df-v 3455  df-sbc 3743  df-dif 3905  df-un 3907  df-in 3909  df-ss 3919  df-nul 4283  df-if 4486  df-pw 4562  df-sn 4588  df-pr 4590  df-op 4594  df-uni 4871  df-br 5108  df-iota 6493  df-fv 6545  df-ov 7419  df-trkgc 28787  df-trkgb 28788  df-trkgcb 28789  df-trkg 28792

This theorem is used by:  tgbtwncomb  28829  tgbtwntriv1  28831  tgbtwnexch3  28834  tgbtwnexch2  28836  tgbtwnouttr  28837  tgbtwnexch  28838  tgtrisegint  28839  tgifscgr  28848  tgcgrxfr  28858  tgbtwnconn1lem1  28912  tgbtwnconn1lem2  28913  tgbtwnconn1lem3  28914  tgbtwnconn1  28915  tgbtwnconn3  28917  tgbtwnconn22  28919  tgbtwnconnln1  28920  tgbtwnconnln2  28921  legtri3  28930  legtrid  28931  legbtwn  28934  tgcgrsub2  28935  hlln  28950  btwnhl2  28956  btwnhl  28957  hlcgrex  28959  hlcgreulem  28960  tglineeltr  28976  mirreu3  29003  mirmir  29011  mireq  29014  miriso  29019  mirconn  29027  mirbtwnhl  29029  mirhl2  29030  mircgrextend  29031  miduniq  29034  colmid  29037  krippenlem  29039  krippen  29040  midexlem  29041  ragflat  29056  ragcgr  29059  footexALT  29070  footexlem1  29071  footexlem2  29072  colperpexlem1  29083  colperpexlem3  29085  mideulem2  29087  opphllem  29088  midex  29090  oppcom  29097  opphllem5  29104  opphllem6  29105  oppmir  29109  outpasch  29110  hlpasch  29111  lnopp2hpgb  29118  colhp  29125  lnincplng  29139  plngrotlem1  29142  plngrotlem2  29143  midbtwn  29161  hypcgrlem1  29182  hypcgrlem2  29183  flatcgra  29209  cgrabtwn  29211  cgracol  29213  dfcgra2  29215  sacgr  29216  oacgr  29217  ragsupplcgra  29222  tgaaddcpbllem1  29226  tgaaddcpbllem2  29227  tgaaddcpbl2  29230  inagswap  29237  inaghl  29241  angmndaddov1lem  29259  angmndaddov2lem  29260  angmndaddcpbl  29263  prlngmolem1  29295  prlngsymquadopp  29308