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Theorem btwncolg1 26358
Description: Betweenness implies colinearity. (Contributed by Thierry Arnoux, 28-Mar-2019.)
Hypotheses
Ref Expression
tglngval.p 𝑃 = (Base‘𝐺)
tglngval.l 𝐿 = (LineG‘𝐺)
tglngval.i 𝐼 = (Itv‘𝐺)
tglngval.g (𝜑𝐺 ∈ TarskiG)
tglngval.x (𝜑𝑋𝑃)
tglngval.y (𝜑𝑌𝑃)
tgcolg.z (𝜑𝑍𝑃)
btwncolg1.z (𝜑𝑍 ∈ (𝑋𝐼𝑌))
Assertion
Ref Expression
btwncolg1 (𝜑 → (𝑍 ∈ (𝑋𝐿𝑌) ∨ 𝑋 = 𝑌))

Proof of Theorem btwncolg1
StepHypRef Expression
1 btwncolg1.z . . 3 (𝜑𝑍 ∈ (𝑋𝐼𝑌))
213mix1d 1333 . 2 (𝜑 → (𝑍 ∈ (𝑋𝐼𝑌) ∨ 𝑋 ∈ (𝑍𝐼𝑌) ∨ 𝑌 ∈ (𝑋𝐼𝑍)))
3 tglngval.p . . 3 𝑃 = (Base‘𝐺)
4 tglngval.l . . 3 𝐿 = (LineG‘𝐺)
5 tglngval.i . . 3 𝐼 = (Itv‘𝐺)
6 tglngval.g . . 3 (𝜑𝐺 ∈ TarskiG)
7 tglngval.x . . 3 (𝜑𝑋𝑃)
8 tglngval.y . . 3 (𝜑𝑌𝑃)
9 tgcolg.z . . 3 (𝜑𝑍𝑃)
103, 4, 5, 6, 7, 8, 9tgcolg 26357 . 2 (𝜑 → ((𝑍 ∈ (𝑋𝐿𝑌) ∨ 𝑋 = 𝑌) ↔ (𝑍 ∈ (𝑋𝐼𝑌) ∨ 𝑋 ∈ (𝑍𝐼𝑌) ∨ 𝑌 ∈ (𝑋𝐼𝑍))))
112, 10mpbird 260 1 (𝜑 → (𝑍 ∈ (𝑋𝐿𝑌) ∨ 𝑋 = 𝑌))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wo 844  w3o 1083   = wceq 1538  wcel 2115  cfv 6345  (class class class)co 7151  Basecbs 16485  TarskiGcstrkg 26233  Itvcitv 26239  LineGclng 26240
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1912  ax-6 1971  ax-7 2016  ax-8 2117  ax-9 2125  ax-10 2146  ax-11 2162  ax-12 2179  ax-ext 2796  ax-sep 5190  ax-nul 5197  ax-pr 5318
This theorem depends on definitions:  df-bi 210  df-an 400  df-or 845  df-3or 1085  df-3an 1086  df-tru 1541  df-ex 1782  df-nf 1786  df-sb 2071  df-mo 2624  df-eu 2655  df-clab 2803  df-cleq 2817  df-clel 2896  df-nfc 2964  df-ne 3015  df-ral 3138  df-rex 3139  df-rab 3142  df-v 3482  df-sbc 3759  df-dif 3922  df-un 3924  df-in 3926  df-ss 3936  df-nul 4277  df-if 4451  df-sn 4551  df-pr 4553  df-op 4557  df-uni 4825  df-br 5054  df-opab 5116  df-id 5448  df-xp 5549  df-rel 5550  df-cnv 5551  df-co 5552  df-dm 5553  df-iota 6304  df-fun 6347  df-fv 6353  df-ov 7154  df-oprab 7155  df-mpo 7156  df-trkgc 26251  df-trkgcb 26253  df-trkg 26256
This theorem is referenced by:  tgdim01ln  26367  lnxfr  26369  tgbtwnconn1lem3  26377  tgbtwnconnln3  26381  legov2  26389  ncolne1  26428  tglineeltr  26434  mirtrcgr  26486  symquadlem  26492  midexlem  26495  ragflat  26507  colperpexlem1  26533  opphllem  26538
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