MPE Home Metamath Proof Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  MPE Home  >  Th. List  >  btwnlng3 Structured version   Visualization version   GIF version

Theorem btwnlng3 29022
Description: Betweenness implies colinearity. (Contributed by Thierry Arnoux, 28-Mar-2019.)
Hypotheses
Ref Expression
btwnlng1.p 𝑃 = (Base‘𝐺)
btwnlng1.i 𝐼 = (Itv‘𝐺)
btwnlng1.l 𝐿 = (LineG‘𝐺)
btwnlng1.g (𝜑 → 𝐺 ∈ TarskiG)
btwnlng1.x (𝜑 → 𝑋 ∈ 𝑃)
btwnlng1.y (𝜑 → 𝑌 ∈ 𝑃)
btwnlng1.z (𝜑 → 𝑍 ∈ 𝑃)
btwnlng1.d (𝜑 → 𝑋 ≠ 𝑌)
btwnlng3.1 (𝜑 → 𝑌 ∈ (𝑋𝐼𝑍))
Assertion
Ref Expression
btwnlng3 (𝜑 → 𝑍 ∈ (𝑋𝐿𝑌))

Proof of Theorem btwnlng3
StepHypRef Expression
1 btwnlng3.1 . . 3 (𝜑 → 𝑌 ∈ (𝑋𝐼𝑍))
213mix3d 1357 . 2 (𝜑 → (𝑍 ∈ (𝑋𝐼𝑌) ∨ 𝑋 ∈ (𝑍𝐼𝑌) ∨ 𝑌 ∈ (𝑋𝐼𝑍)))
3 btwnlng1.p . . 3 𝑃 = (Base‘𝐺)
4 btwnlng1.l . . 3 𝐿 = (LineG‘𝐺)
5 btwnlng1.i . . 3 𝐼 = (Itv‘𝐺)
6 btwnlng1.g . . 3 (𝜑 → 𝐺 ∈ TarskiG)
7 btwnlng1.x . . 3 (𝜑 → 𝑋 ∈ 𝑃)
8 btwnlng1.y . . 3 (𝜑 → 𝑌 ∈ 𝑃)
9 btwnlng1.d . . 3 (𝜑 → 𝑋 ≠ 𝑌)
10 btwnlng1.z . . 3 (𝜑 → 𝑍 ∈ 𝑃)
113, 4, 5, 6, 7, 8, 9, 10tgellng 28949 . 2 (𝜑 → (𝑍 ∈ (𝑋𝐿𝑌) ↔ (𝑍 ∈ (𝑋𝐼𝑌) ∨ 𝑋 ∈ (𝑍𝐼𝑌) ∨ 𝑌 ∈ (𝑋𝐼𝑍))))
122, 11mpbird 260 1 (𝜑 → 𝑍 ∈ (𝑋𝐿𝑌))
Colors of variables:    wff setvar class
This proof depends on syntax axioms:   → wi 4   ∨ w3o 1102   = wceq 1570   ∈ wcel 2145   ≠ wne 2955  ‘cfv 6527  (class class class)co 7408  Basecbs 17348  TarskiGcstrkg 28822  Itvcitv 28828  LineGclng 28829
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-10 2178  ax-11 2194  ax-12 2213  ax-ext 2732  ax-sep 5248  ax-nul 5259  ax-pr 5390
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3or 1104  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-nf 1817  df-sb 2100  df-mo 2564  df-eu 2594  df-clab 2739  df-cleq 2752  df-clel 2835  df-nfc 2909  df-ne 2956  df-ral 3077  df-rex 3087  df-rab 3413  df-v 3452  df-sbc 3739  df-dif 3901  df-un 3903  df-in 3905  df-ss 3915  df-nul 4279  df-if 4482  df-pw 4558  df-sn 4584  df-pr 4586  df-op 4590  df-uni 4867  df-br 5103  df-opab 5167  df-id 5542  df-xp 5653  df-rel 5654  df-cnv 5655  df-co 5656  df-dm 5657  df-iota 6483  df-fun 6529  df-fv 6535  df-ov 7411  df-oprab 7412  df-mpo 7413  df-trkg 28848
This theorem is used by:  midexlem  29097  footexALT  29126  footexlem1  29127  footexlem2  29128  mideulem2  29143  opphllem1  29156  outpasch  29166  colhp  29181  plngrotlem1  29198  plngrotlem2  29199  prlngmolem1  29363  btwnlng13  35233  morleylemrneab  35234
  Copyright terms: Public domain W3C validator