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Theorem btwnlng13 35127
Description: If 𝑍 is between 𝑋 and 𝑌, or 𝑌 is between 𝑋 and 𝑍, then 𝑍 lies on the line 𝑋𝑌. (Contributed by SS, 4-Jun-2026.)
Hypotheses
Ref Expression
btwnlng13.p 𝑃 = (Base‘𝐺)
btwnlng13.i 𝐼 = (Itv‘𝐺)
btwnlng13.l 𝐿 = (LineG‘𝐺)
btwnlng13.g (𝜑𝐺 ∈ TarskiG)
btwnlng13.x (𝜑𝑋𝑃)
btwnlng13.y (𝜑𝑌𝑃)
btwnlng13.z (𝜑𝑍𝑃)
btwnlng13.d (𝜑𝑋𝑌)
btwnlng13.1 (𝜑 → (𝑍 ∈ (𝑋𝐼𝑌) ∨ 𝑌 ∈ (𝑋𝐼𝑍)))
Assertion
Ref Expression
btwnlng13 (𝜑𝑍 ∈ (𝑋𝐿𝑌))

Proof of Theorem btwnlng13
StepHypRef Expression
1 btwnlng13.p . . 3 𝑃 = (Base‘𝐺)
2 btwnlng13.i . . 3 𝐼 = (Itv‘𝐺)
3 btwnlng13.l . . 3 𝐿 = (LineG‘𝐺)
4 btwnlng13.g . . . 4 (𝜑𝐺 ∈ TarskiG)
54adantr 486 . . 3 ((𝜑𝑍 ∈ (𝑋𝐼𝑌)) → 𝐺 ∈ TarskiG)
6 btwnlng13.x . . . 4 (𝜑𝑋𝑃)
76adantr 486 . . 3 ((𝜑𝑍 ∈ (𝑋𝐼𝑌)) → 𝑋𝑃)
8 btwnlng13.y . . . 4 (𝜑𝑌𝑃)
98adantr 486 . . 3 ((𝜑𝑍 ∈ (𝑋𝐼𝑌)) → 𝑌𝑃)
10 btwnlng13.z . . . 4 (𝜑𝑍𝑃)
1110adantr 486 . . 3 ((𝜑𝑍 ∈ (𝑋𝐼𝑌)) → 𝑍𝑃)
12 btwnlng13.d . . . 4 (𝜑𝑋𝑌)
1312adantr 486 . . 3 ((𝜑𝑍 ∈ (𝑋𝐼𝑌)) → 𝑋𝑌)
14 simpr 490 . . 3 ((𝜑𝑍 ∈ (𝑋𝐼𝑌)) → 𝑍 ∈ (𝑋𝐼𝑌))
151, 2, 3, 5, 7, 9, 11, 13, 14btwnlng1 28948 . 2 ((𝜑𝑍 ∈ (𝑋𝐼𝑌)) → 𝑍 ∈ (𝑋𝐿𝑌))
164adantr 486 . . 3 ((𝜑𝑌 ∈ (𝑋𝐼𝑍)) → 𝐺 ∈ TarskiG)
176adantr 486 . . 3 ((𝜑𝑌 ∈ (𝑋𝐼𝑍)) → 𝑋𝑃)
188adantr 486 . . 3 ((𝜑𝑌 ∈ (𝑋𝐼𝑍)) → 𝑌𝑃)
1910adantr 486 . . 3 ((𝜑𝑌 ∈ (𝑋𝐼𝑍)) → 𝑍𝑃)
2012adantr 486 . . 3 ((𝜑𝑌 ∈ (𝑋𝐼𝑍)) → 𝑋𝑌)
21 simpr 490 . . 3 ((𝜑𝑌 ∈ (𝑋𝐼𝑍)) → 𝑌 ∈ (𝑋𝐼𝑍))
221, 2, 3, 16, 17, 18, 19, 20, 21btwnlng3 28950 . 2 ((𝜑𝑌 ∈ (𝑋𝐼𝑍)) → 𝑍 ∈ (𝑋𝐿𝑌))
23 btwnlng13.1 . 2 (𝜑 → (𝑍 ∈ (𝑋𝐼𝑌) ∨ 𝑌 ∈ (𝑋𝐼𝑍)))
2415, 22, 23mpjaodan 973 1 (𝜑𝑍 ∈ (𝑋𝐿𝑌))
Colors of variables:    wff setvar class
This proof depends on syntax axioms:  wi 4  wa 401  wo 861   = wceq 1570  wcel 2146  wne 2960  cfv 6541  (class class class)co 7420  Basecbs 17296  TarskiGcstrkg 28752  Itvcitv 28758  LineGclng 28759
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 2148  ax-9 2156  ax-10 2179  ax-11 2195  ax-12 2216  ax-ext 2737  ax-sep 5259  ax-nul 5271  ax-pr 5406
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 2569  df-eu 2599  df-clab 2744  df-cleq 2757  df-clel 2840  df-nfc 2914  df-ne 2961  df-ral 3082  df-rex 3092  df-rab 3419  df-v 3459  df-sbc 3747  df-dif 3909  df-un 3911  df-in 3913  df-ss 3923  df-nul 4287  df-if 4490  df-pw 4566  df-sn 4592  df-pr 4594  df-op 4598  df-uni 4875  df-br 5112  df-opab 5176  df-id 5558  df-xp 5669  df-rel 5670  df-cnv 5671  df-co 5672  df-dm 5673  df-iota 6497  df-fun 6543  df-fv 6549  df-ov 7423  df-oprab 7424  df-mpo 7425  df-trkg 28778
This theorem is used by:  morleylemrneab  35128
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